CS110-Project-Updated.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",
       "        var component = document.getElementById(\"sketch_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"state_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        component = document.getElementById(\"controls_div_4\");\n",
       "        if (component != undefined)\n",
       "            component.remove();\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "            // FIXME: Stop all previously running versions (?)\n",
       "            var processingInstance = Processing.getInstanceById(\"canvas_4\");\n",
       "            if (processingInstance != undefined && processingInstance.isRunning())\n",
       "                processingInstance.noLoop();\n",
       "        });\n",
       "\n",
       "\n",
       "        var output_area = this;\n",
       "        // find my cell element\n",
       "        var cell_element = output_area.element.parents('.cell');\n",
       "        // which cell is it?\n",
       "        var cell_idx = Jupyter.notebook.get_cell_elements().index(cell_element);\n",
       "        // get the cell object\n",
       "        var cell = Jupyter.notebook.get_cell(cell_idx);\n",
       "\n",
       "        function jyp_print(cell, newline) {\n",
       "            return function(message) {\n",
       "                cell.get_callbacks().iopub.output({header: {\"msg_type\": \"stream\"},\n",
       "                                                   content: {text: message + newline,\n",
       "                                                             name: \"stdout\"}});\n",
       "            }\n",
       "        }\n",
       "        window.jyp_println = jyp_print(cell, \"\\n\");\n",
       "        window.jyp_print = jyp_print(cell, \"\");\n",
       "\n",
       "        require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function() {\n",
       "           Processing.logger.println = jyp_print(cell, \"\\n\");\n",
       "           Processing.logger.print = jyp_print(cell, \"\");\n",
       "        });\n",
       "\n",
       "\n",
       "        "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "\n",
       "<div id=\"canvas_div_4\">\n",
       "  <b>Sketch #4:</b><br/>\n",
       "  <canvas id=\"canvas_4\"></canvas><br/>\n",
       "</div>\n",
       "<div id=\"controls_div_4\">\n",
       "  <button id=\"run_button_4\" onclick=\"startSketch('4');\">\n",
       "    <i class=\"fa fa-play-circle-o\" style=\"size: 2em;\"></i>\n",
       "        Run\n",
       "  </button>\n",
       "  <button id=\"pause_button_4\" onclick=\"pauseSketch('4');\">\n",
       "    <i class=\"fa fa-pause\" style=\"size: 2em;\"></i>\n",
       "        Pause\n",
       "  </button>\n",
       "  <button id=\"setup_button_4\" onclick=\"setupSketch('4');\">\n",
       "    setup()\n",
       "  </button>\n",
       "  <button id=\"draw_button_4\" onclick=\"drawSketch('4');\">\n",
       "    draw()\n",
       "  </button>\n",
       "</div>\n",
       "<b>Sketch #4 state:</b> <span id=\"state_4\">Loading...</span><br/>\n",
       "<script>\n",
       "\n",
       "function change_button(button, disable) {\n",
       "    button.disabled = disable;\n",
       "    if (disable) {\n",
       "        button.style.color = \"grey\";\n",
       "    } else {\n",
       "        button.style.color = \"black\";\n",
       "    }\n",
       "}\n",
       "\n",
       "function startSketch(id) {\n",
       "    switchSketchState(id, true);\n",
       "}\n",
       "\n",
       "function pauseSketch(id) {\n",
       "    switchSketchState(id, false);\n",
       "}\n",
       "\n",
       "function drawSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Drawing...\";\n",
       "            try {\n",
       "                processingInstance.redraw();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Drawing... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No drawing() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function setupSketch(id) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (processingInstance != undefined) {\n",
       "        if (processingInstance.setup != undefined) {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"Setting up...\";\n",
       "            try {\n",
       "                processingInstance.setup();\n",
       "                document.getElementById(\"state_\" + id).innerHTML = \"Setting up... done! Paused.\";\n",
       "                document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "            } catch (e) {\n",
       "                processingInstance.println(e.toString());\n",
       "                document.getElementById(\"state_\" + id).innerHTML = e.toString();\n",
       "                document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "            }\n",
       "        } else {\n",
       "            document.getElementById(\"state_\" + id).innerHTML = \"No setup() function. Paused.\";\n",
       "            document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Error.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"red\";\n",
       "    }\n",
       "    change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "    change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "    change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "    change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "}\n",
       "\n",
       "function switchSketchState(id, on) {\n",
       "    var processingInstance = Processing.getInstanceById(\"canvas_\" + id);\n",
       "    if (on) {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Running...\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"green\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id),  true);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), true);\n",
       "        processingInstance.loop();  // call Processing loop() function\n",
       "    } else {\n",
       "        document.getElementById(\"state_\" + id).innerHTML = \"Paused.\";\n",
       "        document.getElementById(\"state_\" + id).style.color = \"blue\";\n",
       "        change_button(document.getElementById(\"run_button_\" + id), processingInstance.draw == undefined);\n",
       "        change_button(document.getElementById(\"pause_button_\" + id), true);\n",
       "        change_button(document.getElementById(\"setup_button_\" + id), processingInstance.setup == undefined);\n",
       "        change_button(document.getElementById(\"draw_button_\" + id), processingInstance.draw == undefined);\n",
       "        processingInstance.noLoop(); // stop animation, call noLoop()\n",
       "    }\n",
       "}\n",
       "\n",
       "require([window.location.protocol + \"//calysto.github.io/javascripts/processing/processing.js\"], function () {\n",
       "    var processingCode = 'int[][] p = new int[9][9]; // 2-D array for puzzle\\n\\nboolean p1; // puzzle 1\\nboolean p2; // puzzle 2\\nboolean p3; // puzzle 3\\nboolean p4; // puzzle 4\\nboolean p5; // puzzle 5\\nboolean p6; // puzzle 6\\nboolean p7; // puzzle 7\\nboolean p8; // puzzle 8\\nboolean p9; // puzzle 9\\nboolean p10; // puzzle 10\\nboolean p11; // puzzle 11\\nboolean p12; // puzzle 12\\n\\nint row; // the selected row\\nint col; // the selected column\\nint num; // the number that the user enters\\n\\nvoid check1() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][5] = 3;\\n    p[0][8] = 6;\\n    p[1][3] = 7;\\n    p[1][8] = 9;\\n    p[2][2] = 4;\\n    p[2][4] = 6;\\n    p[2][7] = 8;\\n    p[2][8] = 2;\\n    p[3][4] = 9;\\n    p[3][7] = 7;\\n    p[4][1] = 1;\\n    p[4][2] = 6;\\n    p[4][6] = 8;\\n    p[4][7] = 5;\\n    p[5][1] = 2;\\n    p[5][4] = 3;\\n    p[6][0] = 2;\\n    p[6][1] = 8;\\n    p[6][4] = 5;\\n    p[6][6] = 6;\\n    p[7][0] = 3;\\n    p[7][5] = 8;\\n    p[8][0] = 7;\\n    p[8][3] = 1;\\n    \\n    if(p[0][0] != 0 && p[0][0] != 5) {\\n        fill(255, 102, 102);\\n        rect(20, 20, 50, 50);\\n        \\n        fill(255, 0, 0);\\n        right = false;\\n    }\\n    \\n    if(p[0][1] != 0 && p[0][1] != 9) {\\n        fill(255, 102, 102);\\n        rect(70, 20, 50, 50);\\n        \\n        fill(255, 0, 0);\\n        right = false;\\n    }\\n    \\n    if(p[0][2] != 0 && p[0][2] != 2) {\\n        fill(255, 102, 102);\\n        rect(120, 20, 50, 50);\\n        \\n        fill(255, 0, 0);\\n        right = false;\\n    }\\n    \\n    if(p[0][3] != 0 && p[0][3] != 4) {\\n        fill(255, 102, 102);\\n        rect(170, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][4] != 0 && p[0][4] != 8) {\\n        fill(255, 102, 102);\\n        rect(220, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][6] != 0 && p[0][6] != 7) {\\n        fill(255, 102, 102);\\n        rect(320, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][7] != 0 && p[0][7] != 1) {\\n        fill(255, 102, 102);\\n        rect(370, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][0] != 0 && p[1][0] != 6) {\\n        fill(255, 102, 102);\\n        rect(20, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][1] != 0 && p[1][1] != 3) {\\n        fill(255, 102, 102);\\n        rect(70, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][2] != 0 && p[1][2] != 8) {\\n        fill(255, 102, 102);\\n        rect(120, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][3] != 7) {\\n        p[1][3] = 7;\\n    }\\n    \\n    if(p[1][4] != 0 && p[1][4] != 1) {\\n        fill(255, 102, 102);\\n        rect(220, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][5] != 0 && p[1][5] != 2) {\\n        fill(255, 102, 102);\\n        rect(270, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][6] != 0 && p[1][6] != 5) {\\n        fill(255, 102, 102);\\n        rect(320, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][7] != 0 && p[1][7] != 4) {\\n        fill(255, 102, 102);\\n        rect(370, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][8] != 9) {\\n        p[1][8] = 9;\\n    }\\n    \\n    if(p[2][0] != 0 && p[2][0] != 1) {\\n        fill(255, 102, 102);\\n        rect(20, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][1] != 0 && p[2][1] != 7) {\\n        fill(255, 102, 102);\\n        rect(70, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][3] != 0 && p[2][3] != 9) {\\n        fill(255, 102, 102);\\n        rect(170, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][5] != 0 && p[2][5] != 5) {\\n        fill(255, 102, 102);\\n        rect(270, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][6] != 0 && p[2][6] != 3) {\\n        fill(255, 102, 102);\\n        rect(320, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][0] != 0 && p[3][0] != 4) {\\n        fill(255, 102, 102);\\n        rect(20, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][1] != 0 && p[3][1] != 5) {\\n        fill(255, 102, 102);\\n        rect(70, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][2] != 0 && p[3][2] != 3) {\\n        fill(255, 102, 102);\\n        rect(120, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][3] != 0 && p[3][3] != 8) {\\n        fill(255, 102, 102);\\n        rect(170, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][5] != 0 && p[3][5] != 6) {\\n        fill(255, 102, 102);\\n        rect(270, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][6] != 0 && p[3][6] != 2) {\\n        fill(255, 102, 102);\\n        rect(320, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][8] != 0 && p[3][8] != 1) {\\n        fill(255, 102, 102);\\n        rect(420, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][0] != 0 && p[4][0] != 9) {\\n        fill(255, 102, 102);\\n        rect(20, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][3] != 0 && p[4][3] != 2) {\\n        fill(255, 102, 102);\\n        rect(170, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][4] != 0 && p[4][4] != 4) {\\n        fill(255, 102, 102);\\n        rect(220, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][5] != 0 && p[4][5] != 7) {\\n        fill(255, 102, 102);\\n        rect(270, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][8] != 0 && p[4][8] != 3) {\\n        fill(255, 102, 102);\\n        rect(420, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][0] != 0 && p[5][0] != 8) {\\n        fill(255, 102, 102);\\n        rect(20, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][2] != 0 && p[5][2] != 7) {\\n        fill(255, 102, 102);\\n        rect(120, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][3] != 0 && p[5][3] != 5) {\\n        fill(255, 102, 102);\\n        rect(170, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][5] != 0 && p[5][5] != 1) {\\n        fill(255, 102, 102);\\n        rect(270, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][6] != 0 && p[5][6] != 9) {\\n        fill(255, 102, 102);\\n        rect(320, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][7] != 0 && p[5][7] != 6) {\\n        fill(255, 102, 102);\\n        rect(370, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][8] != 0 && p[5][8] != 4) {\\n        fill(255, 102, 102);\\n        rect(420, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][2] != 0 && p[6][2] != 1) {\\n        fill(255, 102, 102);\\n        rect(120, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][3] != 0 && p[6][3] != 3) {\\n        fill(255, 102, 102);\\n        rect(170, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][5] != 0 && p[6][5] != 4) {\\n        fill(255, 102, 102);\\n        rect(270, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][7] != 0 && p[6][7] != 9) {\\n        fill(255, 102, 102);\\n        rect(370, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][8] != 0 && p[6][8] != 7) {\\n        fill(255, 102, 102);\\n        rect(420, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][1] != 0 && p[7][1] != 4) {\\n        fill(255, 102, 102);\\n        rect(70, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][2] != 0 && p[7][2] != 9) {\\n        fill(255, 102, 102);\\n        rect(120, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][3] != 0 && p[7][3] != 6) {\\n        fill(255, 102, 102);\\n        rect(170, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][4] != 0 && p[7][4] != 7) {\\n        fill(255, 102, 102);\\n        rect(220, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][6] != 0 && p[7][6] != 1) {\\n        fill(255, 102, 102);\\n        rect(320, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][7] != 0 && p[7][7] != 2) {\\n        fill(255, 102, 102);\\n        rect(370, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][8] != 0 && p[7][8] != 5) {\\n        fill(255, 102, 102);\\n        rect(420, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][1] != 0 && p[8][1] != 6) {\\n        fill(255, 102, 102);\\n        rect(70, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][2] != 0 && p[8][2] != 5) {\\n        fill(255, 102, 102);\\n        rect(120, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][4] != 0 && p[8][4] != 2) {\\n        fill(255, 102, 102);\\n        rect(220, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][5] != 0 && p[8][5] != 9) {\\n        fill(255, 102, 102);\\n        rect(270, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][6] != 0 && p[8][6] != 4) {\\n        fill(255, 102, 102);\\n        rect(320, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][7] != 0 && p[8][7] != 3) {\\n        fill(255, 102, 102);\\n        rect(370, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][8] != 0 && p[8][8] != 8) {\\n        fill(255, 102, 102);\\n        rect(420, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check2() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][4] = 6;\\n    p[0][5] = 1;\\n    p[0][8] = 5;\\n    p[1][0] = 8;\\n    p[1][4] = 5;\\n    p[2][6] = 8;\\n    p[2][7] = 4;\\n    p[2][8] = 7;\\n    p[3][1] = 5;\\n    p[3][6] = 9;\\n    p[4][0] = 6;\\n    p[4][3] = 9;\\n    p[4][5] = 4;\\n    p[4][8] = 8;\\n    p[5][2] = 3;\\n    p[5][7] = 1;\\n    p[6][0] = 7;\\n    p[6][1] = 9;\\n    p[6][2] = 1;\\n    p[7][4] = 8;\\n    p[7][8] = 2;\\n    p[8][0] = 5;\\n    p[8][3] = 7;\\n    p[8][4] = 3;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check3() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][5] = 1;\\n    p[0][6] = 2;\\n    p[0][7] = 6;\\n    p[1][6] = 7;\\n    p[2][2] = 5;\\n    p[2][4] = 3;\\n    p[2][7] = 8;\\n    p[3][0] = 2;\\n    p[3][1] = 3;\\n    p[3][2] = 6;\\n    p[3][3] = 4;\\n    p[3][7] = 9;\\n    p[4][3] = 6;\\n    p[4][5] = 9;\\n    p[5][1] = 8;\\n    p[5][5] = 2;\\n    p[5][6] = 4;\\n    p[5][7] = 7;\\n    p[5][8] = 6;\\n    p[6][1] = 5;\\n    p[6][4] = 4;\\n    p[6][6] = 1;\\n    p[7][2] = 3;\\n    p[8][1] = 9;\\n    p[8][2] = 8;\\n    p[8][3] = 7;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check4() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][3] = 8;\\n    p[1][4] = 7;\\n    p[1][6] = 2;\\n    p[1][8] = 9;\\n    p[2][5] = 6;\\n    p[2][7] = 1;\\n    p[2][8] = 4;\\n    p[3][1] = 8;\\n    p[3][2] = 2;\\n    p[3][7] = 7;\\n    p[4][1] = 4;\\n    p[4][3] = 3;\\n    p[4][4] = 9;\\n    p[4][5] = 2;\\n    p[4][7] = 8;\\n    p[5][1] = 5;\\n    p[5][6] = 9;\\n    p[5][7] = 2;\\n    p[6][0] = 6;\\n    p[6][1] = 3;\\n    p[6][3] = 5;\\n    p[7][0] = 5;\\n    p[7][2] = 9;\\n    p[7][4] = 1;\\n    p[8][5] = 4;\\n    \\n    if(p[0][0] != 0 && p[0][0] != 2) {\\n        fill(255, 102, 102);\\n        rect(22, 22, 46, 46);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][1] != 0 && p[0][1] != 1) {\\n        fill(255, 102, 102);\\n        rect(72, 22, 46, 46);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][2] != 0 && p[0][2] != 3) {\\n        fill(255, 102, 102);\\n        rect(122, 22, 46, 46);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][4] != 0 && p[0][4] != 4) {\\n        fill(255, 102, 102);\\n        rect(220, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][5] != 0 && p[0][5] != 9) {\\n        fill(255, 102, 102);\\n        rect(270, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][6] != 0 && p[0][6] != 7) {\\n        fill(255, 102, 102);\\n        rect(320, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][7] != 0 && p[0][7] != 6) {\\n        fill(255, 102, 102);\\n        rect(370, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][8] != 0 && p[0][8] != 5) {\\n        fill(255, 102, 102);\\n        rect(420, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][0] != 0 && p[1][0] != 4) {\\n        fill(255, 102, 102);\\n        rect(20, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][1] != 0 && p[1][1] != 6) {\\n        fill(255, 102, 102);\\n        rect(70, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][2] != 0 && p[1][2] != 8) {\\n        fill(255, 102, 102);\\n        rect(120, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][3] != 0 && p[1][3] != 1) {\\n        fill(255, 102, 102);\\n        rect(170, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][5] != 0 && p[1][5] != 5) {\\n        fill(255, 102, 102);\\n        rect(270, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][7] != 0 && p[1][7] != 3) {\\n        fill(255, 102, 102);\\n        rect(370, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][0] != 0 && p[2][0] != 7) {\\n        fill(255, 102, 102);\\n        rect(20, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][1] != 0 && p[2][1] != 9) {\\n        fill(255, 102, 102);\\n        rect(70, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][2] != 0 && p[2][2] != 5) {\\n        fill(255, 102, 102);\\n        rect(120, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][3] != 0 && p[2][3] != 2) {\\n        fill(255, 102, 102);\\n        rect(170, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][4] != 0 && p[2][4] != 3) {\\n        fill(255, 102, 102);\\n        rect(220, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][6] != 0 && p[2][6] != 8) {\\n        fill(255, 102, 102);\\n        rect(320, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][0] != 0 && p[3][0] != 9) {\\n        fill(255, 102, 102);\\n        rect(20, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][3] != 0 && p[3][3] != 6) {\\n        fill(255, 102, 102);\\n        rect(170, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][4] != 0 && p[3][4] != 5) {\\n        fill(255, 102, 102);\\n        rect(220, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][5] != 0 && p[3][5] != 1) {\\n        fill(255, 102, 102);\\n        rect(270, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][6] != 0 && p[3][6] != 4) {\\n        fill(255, 102, 102);\\n        rect(320, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][8] != 0 && p[3][8] != 3) {\\n        fill(255, 102, 102);\\n        rect(420, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][0] != 0 && p[4][0] != 1) {\\n        fill(255, 102, 102);\\n        rect(20, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][2] != 0 && p[4][2] != 7) {\\n        fill(255, 102, 102);\\n        rect(120, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][6] != 0 && p[4][6] != 5) {\\n        fill(255, 102, 102);\\n        rect(320, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][8] != 0 && p[4][8] != 6) {\\n        fill(255, 102, 102);\\n        rect(420, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][0] != 0 && p[5][0] != 3) {\\n        fill(255, 102, 102);\\n        rect(20, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][2] != 0 && p[5][2] != 6) {\\n        fill(255, 102, 102);\\n        rect(120, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][3] != 0 && p[5][3] != 4) {\\n        fill(255, 102, 102);\\n        rect(170, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][4] != 0 && p[5][4] != 8) {\\n        fill(255, 102, 102);\\n        rect(220, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][5] != 0 && p[5][5] != 7) {\\n        fill(255, 102, 102);\\n        rect(270, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][8] != 0 && p[5][8] != 1) {\\n        fill(255, 102, 102);\\n        rect(420, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][2] != 0 && p[6][2] != 4) {\\n        fill(255, 102, 102);\\n        rect(120, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][4] != 0 && p[6][4] != 2) {\\n        fill(255, 102, 102);\\n        rect(220, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][5] != 0 && p[6][5] != 8) {\\n        fill(255, 102, 102);\\n        rect(270, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][6] != 0 && p[6][6] != 1) {\\n        fill(255, 102, 102);\\n        rect(320, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][7] != 0 && p[6][7] != 9) {\\n        fill(255, 102, 102);\\n        rect(370, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][8] != 0 && p[6][8] != 7) {\\n        fill(255, 102, 102);\\n        rect(420, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][1] != 0 && p[7][1] != 2) {\\n        fill(255, 102, 102);\\n        rect(70, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][3] != 0 && p[7][3] != 7) {\\n        fill(255, 102, 102);\\n        rect(170, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][5] != 0 && p[7][5] != 3) {\\n        fill(255, 102, 102);\\n        rect(270, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][6] != 0 && p[7][6] != 6) {\\n        fill(255, 102, 102);\\n        rect(320, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][7] != 0 && p[7][7] != 4) {\\n        fill(255, 102, 102);\\n        rect(370, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][8] != 0 && p[7][8] != 8) {\\n        fill(255, 102, 102);\\n        rect(420, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][0] != 0 && p[8][0] != 8) {\\n        fill(255, 102, 102);\\n        rect(20, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][1] != 0 && p[8][1] != 7) {\\n        fill(255, 102, 102);\\n        rect(70, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][2] != 0 && p[8][2] != 1) {\\n        fill(255, 102, 102);\\n        rect(120, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][3] != 0 && p[8][3] != 9) {\\n        fill(255, 102, 102);\\n        rect(170, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][4] != 0 && p[8][4] != 6) {\\n        fill(255, 102, 102);\\n        rect(220, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][6] != 0 && p[8][6] != 3) {\\n        fill(255, 102, 102);\\n        rect(320, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][7] != 0 && p[8][7] != 5) {\\n        fill(255, 102, 102);\\n        rect(370, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][8] != 0 && p[8][8] != 2) {\\n        fill(255, 102, 102);\\n        rect(420, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check5() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][1] = 9;\\n    p[0][2] = 5;\\n    p[0][4] = 3;\\n    p[0][5] = 6;\\n    p[1][0] = 4;\\n    p[2][0] = 1;\\n    p[2][3] = 8;\\n    p[2][4] = 5;\\n    p[2][6] = 6;\\n    p[2][7] = 7;\\n    p[3][0] = 2;\\n    p[3][2] = 1;\\n    p[4][0] = 9;\\n    p[4][1] = 5;\\n    p[4][7] = 8;\\n    p[4][8] = 6;\\n    p[5][6] = 2;\\n    p[5][8] = 1;\\n    p[6][1] = 7;\\n    p[6][2] = 8;\\n    p[6][4] = 9;\\n    p[6][5] = 1;\\n    p[6][8] = 4;\\n    p[7][8] = 3;\\n    p[8][3] = 2;\\n    p[8][4] = 8;\\n    p[8][6] = 9;\\n    p[8][7] = 6;\\n    \\n    if(p[0][0] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][3] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][5] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][4] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][5] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][6] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][7] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][0] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][1] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][2] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][5] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][8] != 0) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check6() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][0] = 6;\\n    p[0][3] = 5;\\n    p[0][4] = 3;\\n    p[0][8] = 7;\\n    p[1][0] = 4;\\n    p[1][2] = 1;\\n    p[1][7] = 2;\\n    p[2][1] = 9;\\n    p[2][3] = 1;\\n    p[2][5] = 4;\\n    p[3][3] = 8;\\n    p[3][7] = 9;\\n    p[4][0] = 7;\\n    p[4][2] = 4;\\n    p[4][6] = 8;\\n    p[4][8] = 2;\\n    p[5][1] = 8;\\n    p[5][5] = 5;\\n    p[6][3] = 9;\\n    p[6][5] = 1;\\n    p[6][7] = 3;\\n    p[7][1] = 3;\\n    p[7][6] = 9;\\n    p[7][8] = 5;\\n    p[8][0] = 1;\\n    p[8][4] = 5;\\n    p[8][5] = 3;\\n    p[8][8] = 6;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check7() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][0] = 7;\\n    p[0][4] = 2;\\n    p[0][5] = 9;\\n    p[0][7] = 1;\\n    p[1][0] = 2;\\n    p[1][4] = 4;\\n    p[1][5] = 8;\\n    p[2][0] = 8;\\n    p[2][1] = 3;\\n    p[2][4] = 6;\\n    p[2][6] = 2;\\n    p[3][0] = 4;\\n    p[3][2] = 9;\\n    p[3][5] = 6;\\n    p[3][8] = 8;\\n    p[4][0] = 3;\\n    p[4][8] = 1;\\n    p[5][0] = 5;\\n    p[5][3] = 4;\\n    p[5][6] = 6;\\n    p[5][8] = 3;\\n    p[6][2] = 2;\\n    p[6][4] = 9;\\n    p[6][7] = 3;\\n    p[6][8] = 7;\\n    p[7][3] = 6;\\n    p[7][4] = 1;\\n    p[7][8] = 2;\\n    p[8][1] = 4;\\n    p[8][3] = 2;\\n    p[8][4] = 7;\\n    p[8][8] = 6;\\n    \\n    if(p[0][1] != 0 && p[0][1] != 6) {\\n        fill(255, 102, 102);\\n        rect(70, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][2] != 0 && p[0][2] != 5) {\\n        fill(255, 102, 102);\\n        rect(120, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][3] != 0 && p[0][3] != 3) {\\n        fill(255, 102, 102);\\n        rect(170, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][6] != 0 && p[0][6] != 8) {\\n        fill(255, 102, 102);\\n        rect(320, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[0][8] != 0 && p[0][8] != 4) {\\n        fill(255, 102, 102);\\n        rect(420, 20, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][1] != 0 && p[1][1] != 9) {\\n        fill(255, 102, 102);\\n        rect(70, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][2] != 0 && p[1][2] != 1) {\\n        fill(255, 102, 102);\\n        rect(120, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][3] != 0 && p[1][3] != 7) {\\n        fill(255, 102, 102);\\n        rect(170, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][6] != 0 && p[1][6] != 3) {\\n        fill(255, 102, 102);\\n        rect(320, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][7] != 0 && p[1][7] != 6) {\\n        fill(255, 102, 102);\\n        rect(370, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[1][8] != 0 && p[1][8] != 5) {\\n        fill(255, 102, 102);\\n        rect(420, 70, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][2] != 0 && p[2][2] != 4) {\\n        fill(255, 102, 102);\\n        rect(120, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][3] != 0 && p[2][3] != 5) {\\n        fill(255, 102, 102);\\n        rect(170, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][5] != 0 && p[2][5] != 1) {\\n        fill(255, 102, 102);\\n        rect(270, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][7] != 0 && p[2][7] != 7) {\\n        fill(255, 102, 102);\\n        rect(370, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[2][8] != 0 && p[2][8] != 9) {\\n        fill(255, 102, 102);\\n        rect(420, 120, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][1] != 0 && p[3][1] != 2) {\\n        fill(255, 102, 102);\\n        rect(70, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][3] != 0 && p[3][3] != 1) {\\n        fill(255, 102, 102);\\n        rect(170, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][4] != 0 && p[3][4] != 3) {\\n        fill(255, 102, 102);\\n        rect(220, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][6] != 0 && p[3][6] != 7) {\\n        fill(255, 102, 102);\\n        rect(320, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[3][7] != 0 && p[3][7] != 5) {\\n        fill(255, 102, 102);\\n        rect(370, 170, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][1] != 0 && p[4][1] != 8) {\\n        fill(255, 102, 102);\\n        rect(70, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][2] != 0 && p[4][2] != 6) {\\n        fill(255, 102, 102);\\n        rect(120, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][3] != 0 && p[4][3] != 9) {\\n        fill(255, 102, 102);\\n        rect(170, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][4] != 0 && p[4][4] != 5) {\\n        fill(255, 102, 102);\\n        rect(220, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][5] != 0 && p[4][5] != 7) {\\n        fill(255, 102, 102);\\n        rect(270, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][6] != 0 && p[4][6] != 4) {\\n        fill(255, 102, 102);\\n        rect(320, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[4][7] != 0 && p[4][7] != 2) {\\n        fill(255, 102, 102);\\n        rect(370, 220, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][1] != 0 && p[5][1] != 1) {\\n        fill(255, 102, 102);\\n        rect(70, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][2] != 0 && p[5][2] != 7) {\\n        fill(255, 102, 102);\\n        rect(120, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][4] != 0 && p[5][4] != 8) {\\n        fill(255, 102, 102);\\n        rect(220, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[5][5] != 0 && p[5][5] != 2) {\\n        fill(255, 102, 102);\\n        rect(270, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    if(p[5][7] != 0 && p[5][7] != 9) {\\n        fill(255, 102, 102);\\n        rect(370, 270, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][0] != 0 && p[6][0] != 6) {\\n        fill(255, 102, 102);\\n        rect(20, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][1] != 0 && p[6][1] != 5) {\\n        fill(255, 102, 102);\\n        rect(70, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][3] != 0 && p[6][3] != 8) {\\n        fill(255, 102, 102);\\n        rect(170, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][5] != 0 && p[6][5] != 4) {\\n        fill(255, 102, 102);\\n        rect(270, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[6][6] != 0 && p[6][6] != 1) {\\n        fill(255, 102, 102);\\n        rect(320, 320, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][0] != 0 && p[7][0] != 9) {\\n        fill(255, 102, 102);\\n        rect(20, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][1] != 0 && p[7][1] != 7) {\\n        fill(255, 102, 102);\\n        rect(70, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][2] != 0 && p[7][2] != 8) {\\n        fill(255, 102, 102);\\n        rect(120, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][5] != 0 && p[7][5] != 3) {\\n        fill(255, 102, 102);\\n        rect(270, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][6] != 0 && p[7][6] != 5) {\\n        fill(255, 102, 102);\\n        rect(320, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[7][7] != 0 && p[7][7] != 4) {\\n        fill(255, 102, 102);\\n        rect(370, 370, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][0] != 0 && p[8][0] != 1) {\\n        fill(255, 102, 102);\\n        rect(20, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][2] != 0 && p[8][2] != 3) {\\n        fill(255, 102, 102);\\n        rect(120, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][5] != 0 && p[8][5] != 5) {\\n        fill(255, 102, 102);\\n        rect(270, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][6] != 0 && p[8][6] != 9) {\\n        fill(255, 102, 102);\\n        rect(320, 420, 50, 50);\\n        \\n        right = false;\\n    }\\n    \\n    if(p[8][7] != 0 && p[8][7] != 8) {\\n        fill(255, 102, 102);\\n        \\n        right = false;\\n    }\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check8() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][1] = 4;\\n    p[0][2] = 1;\\n    p[0][6] = 8;\\n    p[1][7] = 5;\\n    p[2][1] = 2;\\n    p[2][3] = 7;\\n    p[2][5] = 8;\\n    p[2][6] = 4;\\n    p[2][7] = 9;\\n    p[3][0] = 2;\\n    p[3][4] = 7;\\n    p[3][5] = 9;\\n    p[3][7] = 6;\\n    p[4][2] = 9;\\n    p[4][3] = 5;\\n    p[4][4] = 3;\\n    p[4][5] = 2;\\n    p[4][6] = 1;\\n    p[5][1] = 3;\\n    p[5][3] = 6;\\n    p[5][4] = 1;\\n    p[5][8] = 9;\\n    p[6][1] = 1;\\n    p[6][2] = 2;\\n    p[6][3] = 4;\\n    p[6][5] = 5;\\n    p[6][7] = 8;\\n    p[7][1] = 8;\\n    p[8][2] = 5;\\n    p[8][5] = 1;\\n    p[8][7] = 4;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check9() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][3] = 6;\\n    p[0][7] = 3;\\n    p[0][1] = 1;\\n    p[1][8] = 1;\\n    p[1][3] = 5;\\n    p[1][6] = 2;\\n    p[1][7] = 9;\\n    p[2][3] = 2;\\n    p[2][6] = 6;\\n    p[3][0] = 5;\\n    p[3][4] = 6;\\n    p[3][5] = 2;\\n    p[4][1] = 6;\\n    p[4][2] = 9;\\n    p[4][4] = 8;\\n    p[4][6] = 7;\\n    p[4][7] = 4;\\n    p[5][3] = 3;\\n    p[5][4] = 7;\\n    p[5][8] = 5;\\n    p[6][2] = 6;\\n    p[6][5] = 9;\\n    p[7][1] = 3;\\n    p[7][2] = 4;\\n    p[7][5] = 1;\\n    p[7][7] = 5;\\n    p[8][0] = 7;\\n    p[8][1] = 5;\\n    p[8][5] = 6;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check10() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][2] = 7;\\n    p[0][5] = 6;\\n    p[1][1] = 3;\\n    p[1][5] = 5;\\n    p[2][0] = 5;\\n    p[2][1] = 6;\\n    p[2][2] = 4;\\n    p[2][4] = 1;\\n    p[2][7] = 2;\\n    p[3][0] = 2;\\n    p[3][3] = 5;\\n    p[3][4] = 6;\\n    p[3][8] = 7;\\n    p[4][2] = 5;\\n    p[4][6] = 6;\\n    p[5][0] = 8;\\n    p[5][4] = 7;\\n    p[5][5] = 2;\\n    p[5][8] = 3;\\n    p[6][1] = 8;\\n    p[6][4] = 5;\\n    p[6][6] = 7;\\n    p[6][7] = 9;\\n    p[6][8] = 4;\\n    p[7][3] = 9;\\n    p[7][7] = 3;\\n    p[8][3] = 3;\\n    p[8][6] = 5;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check11() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][5] = 2;\\n    p[0][6] = 5;\\n    p[0][7] = 8;\\n    p[1][0] = 1;\\n    p[1][2] = 2;\\n    p[1][8] = 7;\\n    p[2][3] = 9;\\n    p[2][4] = 7;\\n    p[2][5] = 3;\\n    p[2][6] = 2;\\n    p[2][7] = 6;\\n    p[3][3] = 5;\\n    p[3][4] = 8;\\n    p[3][5] = 4;\\n    p[3][6] = 3;\\n    p[3][7] = 1;\\n    p[4][0] = 2;\\n    p[4][3] = 6;\\n    p[4][5] = 7;\\n    p[4][8] = 5;\\n    p[5][1] = 5;\\n    p[5][2] = 8;\\n    p[5][3] = 2;\\n    p[5][4] = 1;\\n    p[5][5] = 9;\\n    p[6][1] = 7;\\n    p[6][2] = 9;\\n    p[6][3] = 8;\\n    p[6][4] = 2;\\n    p[6][5] = 5;\\n    p[7][0] = 5;\\n    p[7][6] = 7;\\n    p[7][8] = 9;\\n    p[8][1] = 2;\\n    p[8][2] = 3;\\n    p[8][3] = 7;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nvoid check12() {\\n    strokeWeight(1);\\n    textSize(20);\\n    \\n    boolean right = true; // all answers assumed to be initially true\\n    \\n    p[0][0] = 5;\\n    p[0][4] = 9;\\n    p[0][5] = 4;\\n    p[0][6] = 6;\\n    p[0][7] = 3;\\n    p[1][0] = 1;\\n    p[1][1] = 7;\\n    p[1][3] = 3;\\n    p[1][4] = 6;\\n    p[1][6] = 9;\\n    p[1][8] = 2;\\n    p[2][1] = 3;\\n    p[2][4] = 2;\\n    p[2][7] = 4;\\n    p[3][0] = 7;\\n    p[3][8] = 8;\\n    p[4][0] = 2;\\n    p[4][3] = 7;\\n    p[4][5] = 1;\\n    p[4][8] = 6;\\n    p[5][0] = 3;\\n    p[5][8] = 4;\\n    p[6][1] = 9;\\n    p[6][4] = 7;\\n    p[6][7] = 2;\\n    p[7][0] = 4;\\n    p[7][2] = 1;\\n    p[7][4] = 8;\\n    p[7][5] = 9;\\n    p[7][7] = 6;\\n    p[7][8] = 3;\\n    p[8][1] = 2;\\n    p[8][2] = 7;\\n    p[8][3] = 4;\\n    p[8][4] = 1;\\n    p[8][8] = 9;\\n    \\n    if(!right) {\\n        fill(255, 0, 0);\\n        text(\"Something isn\\'t right in the highlighted cell(s).\", 500, 400);\\n    }\\n}\\n\\nboolean checkBox(int number) {\\n    int sum = 0;\\n    \\n    if(number == 0) {\\n        for(int i = 0; i < 3; i++) {\\n            for(int j = 0; j < 3; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 1) {\\n        for(int i = 0; i < 3; i++) {\\n            for(int j = 3; j < 6; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 2) {\\n        for(int i = 0; i < 3; i++) {\\n            for(int j = 6; j < 9; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 3) {\\n        for(int i = 3; i < 6; i++) {\\n            for(int j = 0; j < 3; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 4) {\\n        for(int i = 3; i < 6; i++) {\\n            for(int j = 3; j < 6; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 5) {\\n        for(int i = 3; i < 6; i++) {\\n            for(int j = 6; j < 9; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 6) {\\n        for(int i = 6; i < 9; i++) {\\n            for(int j = 0; j < 3; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 7) {\\n        for(int i = 6; i < 9; i++) {\\n            for(int j = 3; j < 6; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    } else if(number == 8) {\\n        for(int i = 6; i < 9; i++) {\\n            for(int j = 6; j < 9; j++) {\\n                sum += p[i][j];\\n            }\\n        }\\n    }\\n    \\n    if(sum == 45) {\\n        return true;\\n    } else {\\n        return false;\\n    }\\n}\\n\\nboolean checkColumn(int number) {\\n    int sum = 0;\\n    \\n    for(int i = 0; i < p.length; i++) {\\n        sum += p[i][num];\\n    }\\n    \\n    if(sum == 45) {\\n        return true;\\n    } else {\\n        return false;\\n    }\\n}\\n\\nboolean checkCompletion() {\\n    for(int i = 0; i < p.length; i++) {\\n        for(int j = 0; j < p[i].length; j++) {\\n            if(p[i][j] == 0) {\\n                i = p.length;\\n                j = p[i].length;\\n\\n                return false;\\n            }\\n        }\\n    }\\n    \\n    return true;\\n}\\n\\nboolean checkRow(int number) {\\n    int sum = 0;\\n    \\n    for(int i = 0; i < p[number].length; i++) {\\n        sum += p[number][i];\\n    }\\n    \\n    if(sum == 45) {\\n        return true;\\n    } else {\\n        return false;\\n    }\\n}\\n\\nboolean checkWin() {\\n    for(int i = 0; i < 9; i++) {\\n        if(!checkRow(i) || !checkColumn(i) || !checkBox(i)) {\\n            i = 9;\\n            return false;\\n        }\\n    }\\n    \\n    return true;\\n}\\n\\nvoid choosePuzzle() {\\n    int puzzle = (int)(random(12) + 1);\\n    \\n    println(\"Puzzle \" + puzzle);\\n    \\n    if(puzzle == 1) {\\n        puzzle1();\\n        p1 = true;\\n    } else if(puzzle == 2) {\\n        puzzle2();\\n        p2 = true;\\n    } else if(puzzle == 3) {\\n        puzzle3();\\n        p3 = true;\\n    } else if(puzzle == 4) {\\n        puzzle4();\\n        p4 = true;\\n    } else if(puzzle == 5) {\\n        puzzle5();\\n        p5 = true;\\n    } else if(puzzle == 6) {\\n        puzzle6();\\n        p6 = true;\\n    } else if(puzzle == 7) {\\n        puzzle7();\\n        p7 = true;\\n    } else if(puzzle == 8) {\\n        puzzle8();\\n        p8 = true;\\n    } else if(puzzle == 9) {\\n        puzzle9();\\n        p9 = true;\\n    } else if(puzzle == 10) {\\n        puzzle10();\\n        p10 = true;\\n    } else if(puzzle == 11) {\\n        puzzle11();\\n        p11 = true;\\n    } else if(puzzle == 12) {\\n        puzzle12();\\n        p12 = true;\\n    }\\n}\\n\\nvoid completed() {\\n    if(checkWin()) {\\n        textSize(20);\\n        fill(0, 128, 0);\\n        text(\"Congratulations! You solved the puzzle\", 500, 400);\\n        text(\"correctly. 😃\", 500, 430);\\n    } else {\\n        textSize(20);\\n        fill(255, 0, 0);\\n        text(\"😞 Sorry! Your solution to this puzzle is\", 500, 430);\\n        text(\"incorrect. Please try again!\", 500, 460);\\n    }\\n}\\n\\nvoid displayBoard() {\\n    textSize(30); // sets the text size to 30\\n    fill(0); // sets the text color to black\\n    \\n    int x = 37;\\n    int y = 55;\\n    \\n    for(int i = 0; i < p.length; i++) {\\n        for(int j = 0; j < p[i].length; j++) {\\n            if(p[i][j] != 0) {\\n                text(str(p[i][j]), x, y);\\n            }\\n            \\n            x += 50;\\n        }\\n        \\n        x = 37;\\n        y += 50;\\n    }\\n}\\n\\nvoid getCell(int x, int y) {\\n    if(x > 20 && x < 70) {\\n        col = 0;\\n    } else if(x < 120) {\\n        col = 1;\\n    } else if(x < 170) {\\n        col = 2;\\n    } else if(x < 220) {\\n        col = 3;\\n    } else if(x < 270) {\\n        col = 4;\\n    } else if(x < 320) {\\n        col = 5;\\n    } else if(x < 370) {\\n        col = 6;\\n    } else if(x < 420) {\\n        col = 7;\\n    } else if(x < 470) {\\n        col = 8;\\n    }\\n    \\n    if(y > 20 && y < 70) {\\n        row = 0;\\n    } else if(y < 120) {\\n        row = 1;\\n    } else if(y < 170) {\\n        row = 2;\\n    } else if(y < 220) {\\n        row = 3;\\n    } else if(y < 270) {\\n        row = 4;\\n    } else if(y < 320) {\\n        row = 5;\\n    } else if(y < 370) {\\n        row = 6;\\n    } else if(y < 420) {\\n        row = 7;\\n    } else if(y < 470) {\\n        row = 8;\\n    }\\n}\\n\\nvoid grid() {\\n    background(255);\\n    fill(255);\\n    \\n    strokeWeight(9); // thick lines\\n    \\n    // outer box\\n    line(20, 20, 20, 470);\\n    line(20, 20, 470, 20);\\n    line(470, 470, 470, 20);\\n    line(470, 470, 20, 470);\\n    \\n    strokeWeight(3); // thin lines\\n    \\n    int x = 20;\\n    int y = 20;\\n    int w = 50;\\n    int h = 50;\\n    \\n    int[][] cells = new int[9][9];\\n    \\n    for(int i = 0; i < 9; i++) {\\n        for(int j = 0; j < 9; j++) {\\n            rect(x, y, w, h);\\n            x += 50;\\n        }\\n        \\n        x = 20;\\n        y += 50;\\n    }\\n    \\n    strokeWeight(7); // thick lines for 3x3 boxes\\n    \\n    // separating for 3x3 boxes\\n    line(20, 170, 470, 170); // top horizontal line\\n    line(20, 320, 470, 320); // bottom horizontal line\\n    line(170, 20, 170, 470); // left vertical line\\n    line(320, 20, 320, 470); // right vertical line\\n}\\n\\nvoid instructions() {\\n    textSize(20);\\n    fill(0);\\n    \\n    for(int i = 0; i < 4; i++) {\\n        text(\"Instructions\", 500, 50);\\n    }\\n    \\n    strokeWeight(3);\\n    line(500, 55, 602, 55);\\n    \\n    int ty1 = 85; // y position of the first line of the first paragraph\\n    int ty2 = 210; // y position of the first line of the second paragraph\\n    int ty3 = ty2 + 100; // y position of the first line of the third paragraph\\n    \\n    text(\"Using the numbers 1 through 9, fill in the grid\", 500, ty1);\\n    text(\"so that each row, column, and 3x3 box \", 500, ty1 + 25);\\n    text(\"contains the each of the nine numbers only\", 500, ty1 + 50);\\n    text(\"once.\", 500, ty1 + 75);\\n    \\n    text(\"To select a cell, hover over a desired cell and \", 500, ty2);\\n    text(\"click on it. If you made a mistake, press\", 500, ty2 + 25);\\n    text(\"0 to get rid of the number and clear the cell.\", 500, ty2 + 50);\\n    \\n    text(\"If you want to change the puzzle, please\", 500, ty3);\\n    text(\"press the r key.\", 500, ty3 + 25);\\n}\\n\\nvoid keyPressed() {\\n    if (key == \\'0\\') {\\n        num = 0;\\n        updateArray();\\n    } else if(key == \\'1\\') {\\n        num = 1;\\n        updateArray();\\n    } else if(key == \\'2\\') {\\n        num = 2;\\n        updateArray();\\n    } else if(key == \\'3\\') {\\n        num = 3;\\n        updateArray();\\n    } else if(key == \\'4\\') {\\n        num = 4;\\n        updateArray();\\n    } else if(key == \\'5\\') {\\n        num = 5;\\n        updateArray();\\n    } else if(key == \\'6\\') {\\n        num = 6;\\n        updateArray();\\n    } else if(key == \\'7\\') {\\n        num = 7;\\n        updateArray();\\n    } else if(key == \\'8\\') {\\n        num = 8;\\n        updateArray();\\n    } else if(key == \\'9\\') {\\n        num = 9;\\n        updateArray();\\n    } else if(key == \\'r\\' || key == \\'R\\') {\\n        setup();\\n    }\\n}\\n\\nvoid mousePressed() {\\n    num = 0;\\n    getCell(mouseX, mouseY);\\n}\\n\\nvoid puzzle1() {\\n    // www.websudoku.com – Evil Puzzle 124\\n    \\n    p[0][5] = 3;\\n    p[0][8] = 6;\\n    p[1][3] = 7;\\n    p[1][8] = 9;\\n    p[2][2] = 4;\\n    p[2][4] = 6;\\n    p[2][7] = 8;\\n    p[2][8] = 2;\\n    p[3][4] = 9;\\n    p[3][7] = 7;\\n    p[4][1] = 1;\\n    p[4][2] = 6;\\n    p[4][6] = 8;\\n    p[4][7] = 5;\\n    p[5][1] = 2;\\n    p[5][4] = 3;\\n    p[6][0] = 2;\\n    p[6][1] = 8;\\n    p[6][4] = 5;\\n    p[6][6] = 6;\\n    p[7][0] = 3;\\n    p[7][5] = 8;\\n    p[8][0] = 7;\\n    p[8][3] = 1;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle2() {\\n    // www.websudoku.com – Evil Puzzle 6,101,976,392\\n    \\n    p[0][4] = 6;\\n    p[0][5] = 1;\\n    p[0][8] = 5;\\n    p[1][0] = 8;\\n    p[1][4] = 5;\\n    p[2][6] = 8;\\n    p[2][7] = 4;\\n    p[2][8] = 7;\\n    p[3][1] = 5;\\n    p[3][6] = 9;\\n    p[4][0] = 6;\\n    p[4][3] = 9;\\n    p[4][5] = 4;\\n    p[4][8] = 8;\\n    p[5][2] = 3;\\n    p[5][7] = 1;\\n    p[6][0] = 7;\\n    p[6][1] = 9;\\n    p[6][2] = 1;\\n    p[7][4] = 8;\\n    p[7][8] = 2;\\n    p[8][0] = 5;\\n    p[8][3] = 7;\\n    p[8][4] = 3;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle3() {\\n    // www.websudoku.com – Evil Puzzle 8,655,032,120\\n    \\n    p[0][5] = 1;\\n    p[0][6] = 2;\\n    p[0][7] = 6;\\n    p[1][6] = 7;\\n    p[2][2] = 5;\\n    p[2][4] = 3;\\n    p[2][7] = 8;\\n    p[3][0] = 2;\\n    p[3][1] = 3;\\n    p[3][2] = 6;\\n    p[3][3] = 4;\\n    p[3][7] = 9;\\n    p[4][3] = 6;\\n    p[4][5] = 9;\\n    p[5][1] = 8;\\n    p[5][5] = 2;\\n    p[5][6] = 4;\\n    p[5][7] = 7;\\n    p[5][8] = 6;\\n    p[6][1] = 5;\\n    p[6][4] = 4;\\n    p[6][6] = 1;\\n    p[7][2] = 3;\\n    p[8][1] = 9;\\n    p[8][2] = 8;\\n    p[8][3] = 7;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle4() {\\n    // www.websudoku.com – Evil Puzzle 8,895,091,461\\n    \\n    p[0][3] = 8;\\n    p[1][4] = 7;\\n    p[1][6] = 2;\\n    p[1][8] = 9;\\n    p[2][5] = 6;\\n    p[2][7] = 1;\\n    p[2][8] = 4;\\n    p[3][1] = 8;\\n    p[3][2] = 2;\\n    p[3][7] = 7;\\n    p[4][1] = 4;\\n    p[4][3] = 3;\\n    p[4][4] = 9;\\n    p[4][5] = 2;\\n    p[4][7] = 8;\\n    p[5][1] = 5;\\n    p[5][6] = 9;\\n    p[5][7] = 2;\\n    p[6][0] = 6;\\n    p[6][1] = 3;\\n    p[6][3] = 5;\\n    p[7][0] = 5;\\n    p[7][2] = 9;\\n    p[7][4] = 1;\\n    p[8][5] = 4;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle5() {\\n    // www.websudoku.com – Hard Puzzle 3,864,710,980\\n    \\n    p[0][1] = 9;\\n    p[0][2] = 5;\\n    p[0][4] = 3;\\n    p[0][5] = 6;\\n    p[1][0] = 4;\\n    p[2][0] = 1;\\n    p[2][3] = 8;\\n    p[2][4] = 5;\\n    p[2][6] = 6;\\n    p[2][7] = 7;\\n    p[3][0] = 2;\\n    p[3][2] = 1;\\n    p[4][0] = 9;\\n    p[4][1] = 5;\\n    p[4][7] = 8;\\n    p[4][8] = 6;\\n    p[5][6] = 2;\\n    p[5][8] = 1;\\n    p[6][1] = 7;\\n    p[6][2] = 8;\\n    p[6][4] = 9;\\n    p[6][5] = 1;\\n    p[6][8] = 4;\\n    p[7][8] = 3;\\n    p[8][3] = 2;\\n    p[8][4] = 8;\\n    p[8][6] = 9;\\n    p[8][7] = 6;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle6() {\\n    // www.websudoku.com – Hard Puzzle 9,934,487,744\\n    \\n    p[0][0] = 6;\\n    p[0][3] = 5;\\n    p[0][4] = 3;\\n    p[0][8] = 7;\\n    p[1][0] = 4;\\n    p[1][2] = 1;\\n    p[1][7] = 2;\\n    p[2][1] = 9;\\n    p[2][3] = 1;\\n    p[2][5] = 4;\\n    p[3][3] = 8;\\n    p[3][7] = 9;\\n    p[4][0] = 7;\\n    p[4][2] = 4;\\n    p[4][6] = 8;\\n    p[4][8] = 2;\\n    p[5][1] = 8;\\n    p[5][5] = 5;\\n    p[6][3] = 9;\\n    p[6][5] = 1;\\n    p[6][7] = 3;\\n    p[7][1] = 3;\\n    p[7][6] = 9;\\n    p[7][8] = 5;\\n    p[8][0] = 1;\\n    p[8][4] = 5;\\n    p[8][5] = 3;\\n    p[8][8] = 6;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle7() {\\n    // www.websudoku.com – Medium Puzzle 2,981,621,299\\n    \\n    p[0][0] = 7;\\n    p[0][4] = 2;\\n    p[0][5] = 9;\\n    p[0][7] = 1;\\n    p[1][0] = 2;\\n    p[1][4] = 4;\\n    p[1][5] = 8;\\n    p[2][0] = 8;\\n    p[2][1] = 3;\\n    p[2][4] = 6;\\n    p[2][6] = 2;\\n    p[3][0] = 4;\\n    p[3][2] = 9;\\n    p[3][5] = 6;\\n    p[3][8] = 8;\\n    p[4][0] = 3;\\n    p[4][8] = 1;\\n    p[5][0] = 5;\\n    p[5][3] = 4;\\n    p[5][6] = 6;\\n    p[5][8] = 3;\\n    p[6][2] = 2;\\n    p[6][4] = 9;\\n    p[6][7] = 3;\\n    p[6][8] = 7;\\n    p[7][3] = 6;\\n    p[7][4] = 1;\\n    p[7][8] = 2;\\n    p[8][1] = 4;\\n    p[8][3] = 2;\\n    p[8][4] = 7;\\n    p[8][8] = 6;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle8() {\\n    // www.websudoku.com – Medium Puzzle 3,075,869,438\\n    \\n    p[0][1] = 4;\\n    p[0][2] = 1;\\n    p[0][6] = 8;\\n    p[1][7] = 5;\\n    p[2][1] = 2;\\n    p[2][3] = 7;\\n    p[2][5] = 8;\\n    p[2][6] = 4;\\n    p[2][7] = 9;\\n    p[3][0] = 2;\\n    p[3][4] = 7;\\n    p[3][5] = 9;\\n    p[3][7] = 6;\\n    p[4][2] = 9;\\n    p[4][3] = 5;\\n    p[4][4] = 3;\\n    p[4][5] = 2;\\n    p[4][6] = 1;\\n    p[5][1] = 3;\\n    p[5][3] = 6;\\n    p[5][4] = 1;\\n    p[5][8] = 9;\\n    p[6][1] = 1;\\n    p[6][2] = 2;\\n    p[6][3] = 4;\\n    p[6][5] = 5;\\n    p[6][7] = 8;\\n    p[7][1] = 8;\\n    p[8][2] = 5;\\n    p[8][5] = 1;\\n    p[8][7] = 4;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle9() {\\n    // www.websudoku.com – Medium Puzzle 6,569,172,006\\n    \\n    p[0][3] = 6;\\n    p[0][7] = 3;\\n    p[0][1] = 1;\\n    p[1][8] = 1;\\n    p[1][3] = 5;\\n    p[1][6] = 2;\\n    p[1][7] = 9;\\n    p[2][3] = 2;\\n    p[2][6] = 6;\\n    p[3][0] = 5;\\n    p[3][4] = 6;\\n    p[3][5] = 2;\\n    p[4][1] = 6;\\n    p[4][2] = 9;\\n    p[4][4] = 8;\\n    p[4][6] = 7;\\n    p[4][7] = 4;\\n    p[5][3] = 3;\\n    p[5][4] = 7;\\n    p[5][8] = 5;\\n    p[6][2] = 6;\\n    p[6][5] = 9;\\n    p[7][1] = 3;\\n    p[7][2] = 4;\\n    p[7][5] = 1;\\n    p[7][7] = 5;\\n    p[8][0] = 7;\\n    p[8][1] = 5;\\n    p[8][5] = 6;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle10() {\\n    // www.websudoku.com – Medium Puzzle 8,136,223,360\\n    \\n    p[0][2] = 7;\\n    p[0][5] = 6;\\n    p[1][1] = 3;\\n    p[1][5] = 5;\\n    p[2][0] = 5;\\n    p[2][1] = 6;\\n    p[2][2] = 4;\\n    p[2][4] = 1;\\n    p[2][7] = 2;\\n    p[3][0] = 2;\\n    p[3][3] = 5;\\n    p[3][4] = 6;\\n    p[3][8] = 7;\\n    p[4][2] = 5;\\n    p[4][6] = 6;\\n    p[5][0] = 8;\\n    p[5][4] = 7;\\n    p[5][5] = 2;\\n    p[5][8] = 3;\\n    p[6][1] = 8;\\n    p[6][4] = 5;\\n    p[6][6] = 7;\\n    p[6][7] = 9;\\n    p[6][8] = 4;\\n    p[7][3] = 9;\\n    p[7][7] = 3;\\n    p[8][3] = 3;\\n    p[8][6] = 5;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle11() {\\n    // www.websudoku.com – Easy Puzzle 314,794,788\\n    \\n    p[0][5] = 2;\\n    p[0][6] = 5;\\n    p[0][7] = 8;\\n    p[1][0] = 1;\\n    p[1][2] = 2;\\n    p[1][8] = 7;\\n    p[2][3] = 9;\\n    p[2][4] = 7;\\n    p[2][5] = 3;\\n    p[2][6] = 2;\\n    p[2][7] = 6;\\n    p[3][3] = 5;\\n    p[3][4] = 8;\\n    p[3][5] = 4;\\n    p[3][6] = 3;\\n    p[3][7] = 1;\\n    p[4][0] = 2;\\n    p[4][3] = 6;\\n    p[4][5] = 7;\\n    p[4][8] = 5;\\n    p[5][1] = 5;\\n    p[5][2] = 8;\\n    p[5][3] = 2;\\n    p[5][4] = 1;\\n    p[5][5] = 9;\\n    p[6][1] = 7;\\n    p[6][2] = 9;\\n    p[6][3] = 8;\\n    p[6][4] = 2;\\n    p[6][5] = 5;\\n    p[7][0] = 5;\\n    p[7][6] = 7;\\n    p[7][8] = 9;\\n    p[8][1] = 2;\\n    p[8][2] = 3;\\n    p[8][3] = 7;\\n    \\n    displayBoard();\\n}\\n\\nvoid puzzle12() {\\n    // www.websudoku.com – Easy Puzzle 2,006,736,503\\n    \\n    p[0][0] = 5;\\n    p[0][4] = 9;\\n    p[0][5] = 4;\\n    p[0][6] = 6;\\n    p[0][7] = 3;\\n    p[1][0] = 1;\\n    p[1][1] = 7;\\n    p[1][3] = 3;\\n    p[1][4] = 6;\\n    p[1][6] = 9;\\n    p[1][8] = 2;\\n    p[2][1] = 3;\\n    p[2][4] = 2;\\n    p[2][7] = 4;\\n    p[3][0] = 7;\\n    p[3][8] = 8;\\n    p[4][0] = 2;\\n    p[4][3] = 7;\\n    p[4][5] = 1;\\n    p[4][8] = 6;\\n    p[5][0] = 3;\\n    p[5][8] = 4;\\n    p[6][1] = 9;\\n    p[6][4] = 7;\\n    p[6][7] = 2;\\n    p[7][0] = 4;\\n    p[7][2] = 1;\\n    p[7][4] = 8;\\n    p[7][5] = 9;\\n    p[7][7] = 6;\\n    p[7][8] = 3;\\n    p[8][1] = 2;\\n    p[8][2] = 7;\\n    p[8][3] = 4;\\n    p[8][4] = 1;\\n    p[8][8] = 9;\\n    \\n    displayBoard();\\n}\\n\\nvoid updateAndDisplay() {\\n    num = 0;\\n    \\n    grid();\\n    \\n    if(p1) {\\n        check1();\\n    } else if(p2) {\\n        check2();\\n    } else if(p3) {\\n        check3();\\n    } else if(p4) {\\n        check4();\\n    } else if(p5) {\\n        check5();\\n    } else if(p6) {\\n        check6();\\n    } else if(p7) {\\n        check7();\\n    } else if(p8) {\\n        check8();\\n    } else if(p9) {\\n        check9();\\n    } else if(p10) {\\n        check10();\\n    } else if(p11) {\\n        check11();\\n    } else if(p12) {\\n        check12();\\n    }\\n    \\n    displayBoard();\\n    \\n    instructions();\\n    \\n    if(checkCompletion()) {\\n        completed();\\n    }\\n}\\n\\nvoid updateArray() {\\n    p[row][col] = num;\\n\\n    updateAndDisplay();\\n}\\n\\nvoid setup() {\\n    size(900, 500);\\n    background(255, 255, 255);\\n    \\n    p1 = false;\\n    p2 = false;\\n    p3 = false;\\n    p4 = true;\\n    p5 = false;\\n    p6 = false;\\n    p7 = false;\\n    p8 = false;\\n    p9 = false;\\n    p10 = false;\\n    p11 = false;\\n    \\n    for(int i = 0; i < p.length; i++) {\\n        for(int j = 0; j < p[i].length; j++) {\\n            p[i][j] = 0;\\n        }\\n    }\\n    \\n    grid();\\n    instructions();\\n    choosePuzzle();\\n}';\n",
       "    var cc;\n",
       "    var processingInstance;\n",
       "    var has_error = false;\n",
       "\n",
       "    try {\n",
       "        cc = Processing.compile(processingCode);\n",
       "    } catch (e) {\n",
       "        console.log(e);\n",
       "        cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "        document.getElementById(\"state_4\").innerHTML = e.toString();\n",
       "        document.getElementById(\"state_4\").style.color = \"red\";\n",
       "        has_error = true;\n",
       "    }\n",
       "    if (cc != undefined) {\n",
       "        try {\n",
       "            processingInstance = new Processing(\"canvas_4\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "        } catch (e) {\n",
       "            console.log(e);\n",
       "            cc = Processing.compile(\"println('\" + e.toString() + \"');\");\n",
       "            document.getElementById(\"state_4\").innerHTML = e.toString();\n",
       "            document.getElementById(\"state_4\").style.color = \"red\";\n",
       "            processingInstance = new Processing(\"canvas_4\", cc);\n",
       "            processingInstance.println = window.jyp_println\n",
       "            has_error = true;\n",
       "        }\n",
       "    }\n",
       "    if (processingInstance != undefined) {\n",
       "        setTimeout(function () {\n",
       "            // Canvas:\n",
       "            if (processingInstance.externals.context === undefined) {\n",
       "                document.getElementById(\"canvas_div_4\").style.display = \"none\";\n",
       "            }\n",
       "        }, 100);\n",
       "        // Controls:\n",
       "        if (!(processingInstance.isRunning() && processingInstance.draw != undefined)) {\n",
       "            document.getElementById(\"controls_div_4\").style.display = \"none\";\n",
       "        }\n",
       "        if (processingInstance.draw != undefined) {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_4\").innerHTML = \"Running...\";\n",
       "                document.getElementById(\"state_4\").style.color = \"green\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_4\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_4\"), false);\n",
       "            change_button(document.getElementById(\"setup_button_4\"),  true);\n",
       "            change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "        } else {\n",
       "            if (!has_error) {\n",
       "                document.getElementById(\"state_4\").innerHTML = \"Done.\";\n",
       "                document.getElementById(\"state_4\").style.color = \"blue\";\n",
       "            }\n",
       "            change_button(document.getElementById(\"run_button_4\"), true);\n",
       "            change_button(document.getElementById(\"pause_button_4\"), true);\n",
       "            change_button(document.getElementById(\"setup_button_4\"),  processingInstance.setup == undefined);\n",
       "            change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "        }\n",
       "    } else {\n",
       "        document.getElementById(\"canvas_div_4\").style.display = \"none\";\n",
       "        document.getElementById(\"controls_div_4\").style.display = \"none\";\n",
       "        if (!has_error) {\n",
       "            document.getElementById(\"state_4\").innerHTML = \"Error.\";\n",
       "            document.getElementById(\"state_4\").style.color = \"red\";\n",
       "        }\n",
       "        change_button(document.getElementById(\"run_button_4\"), true);\n",
       "        change_button(document.getElementById(\"pause_button_4\"), true);\n",
       "        change_button(document.getElementById(\"setup_button_4\"),  true);\n",
       "        change_button(document.getElementById(\"draw_button_4\"), true);\n",
       "    }\n",
       "});\n",
       "\n",
       "</script>\n"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Puzzle 10\n",
      "Puzzle 4\n",
      "Puzzle 3\n",
      "Puzzle 2\n",
      "Puzzle 11\n",
      "Puzzle 12\n",
      "Puzzle 9\n",
      "Puzzle 12\n"
     ]
    }
   ],
   "source": [
    "int[][] p = new int[9][9]; // 2-D array for puzzle\n",
    "\n",
    "boolean p1; // puzzle 1\n",
    "boolean p2; // puzzle 2\n",
    "boolean p3; // puzzle 3\n",
    "boolean p4; // puzzle 4\n",
    "boolean p5; // puzzle 5\n",
    "boolean p6; // puzzle 6\n",
    "boolean p7; // puzzle 7\n",
    "boolean p8; // puzzle 8\n",
    "boolean p9; // puzzle 9\n",
    "boolean p10; // puzzle 10\n",
    "boolean p11; // puzzle 11\n",
    "boolean p12; // puzzle 12\n",
    "\n",
    "int row; // the selected row\n",
    "int col; // the selected column\n",
    "int num; // the number that the user enters\n",
    "\n",
    "void check1() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][5] = 3;\n",
    "    p[0][8] = 6;\n",
    "    p[1][3] = 7;\n",
    "    p[1][8] = 9;\n",
    "    p[2][2] = 4;\n",
    "    p[2][4] = 6;\n",
    "    p[2][7] = 8;\n",
    "    p[2][8] = 2;\n",
    "    p[3][4] = 9;\n",
    "    p[3][7] = 7;\n",
    "    p[4][1] = 1;\n",
    "    p[4][2] = 6;\n",
    "    p[4][6] = 8;\n",
    "    p[4][7] = 5;\n",
    "    p[5][1] = 2;\n",
    "    p[5][4] = 3;\n",
    "    p[6][0] = 2;\n",
    "    p[6][1] = 8;\n",
    "    p[6][4] = 5;\n",
    "    p[6][6] = 6;\n",
    "    p[7][0] = 3;\n",
    "    p[7][5] = 8;\n",
    "    p[8][0] = 7;\n",
    "    p[8][3] = 1;\n",
    "    \n",
    "    if(p[0][0] != 0 && p[0][0] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 20, 50, 50);\n",
    "        \n",
    "        fill(255, 0, 0);\n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][1] != 0 && p[0][1] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 20, 50, 50);\n",
    "        \n",
    "        fill(255, 0, 0);\n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][2] != 0 && p[0][2] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 20, 50, 50);\n",
    "        \n",
    "        fill(255, 0, 0);\n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][3] != 0 && p[0][3] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][4] != 0 && p[0][4] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][6] != 0 && p[0][6] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][7] != 0 && p[0][7] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][0] != 0 && p[1][0] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][1] != 0 && p[1][1] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][2] != 0 && p[1][2] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][3] != 7) {\n",
    "        p[1][3] = 7;\n",
    "    }\n",
    "    \n",
    "    if(p[1][4] != 0 && p[1][4] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][5] != 0 && p[1][5] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][6] != 0 && p[1][6] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][7] != 0 && p[1][7] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][8] != 9) {\n",
    "        p[1][8] = 9;\n",
    "    }\n",
    "    \n",
    "    if(p[2][0] != 0 && p[2][0] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][1] != 0 && p[2][1] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][3] != 0 && p[2][3] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][5] != 0 && p[2][5] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][6] != 0 && p[2][6] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][0] != 0 && p[3][0] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][1] != 0 && p[3][1] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][2] != 0 && p[3][2] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][3] != 0 && p[3][3] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][5] != 0 && p[3][5] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][6] != 0 && p[3][6] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][8] != 0 && p[3][8] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][0] != 0 && p[4][0] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][3] != 0 && p[4][3] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][4] != 0 && p[4][4] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][5] != 0 && p[4][5] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][8] != 0 && p[4][8] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][0] != 0 && p[5][0] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][2] != 0 && p[5][2] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][3] != 0 && p[5][3] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][5] != 0 && p[5][5] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][6] != 0 && p[5][6] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][7] != 0 && p[5][7] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][8] != 0 && p[5][8] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][2] != 0 && p[6][2] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][3] != 0 && p[6][3] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][5] != 0 && p[6][5] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][7] != 0 && p[6][7] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][8] != 0 && p[6][8] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][1] != 0 && p[7][1] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][2] != 0 && p[7][2] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][3] != 0 && p[7][3] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][4] != 0 && p[7][4] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][6] != 0 && p[7][6] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][7] != 0 && p[7][7] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][8] != 0 && p[7][8] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][1] != 0 && p[8][1] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][2] != 0 && p[8][2] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][4] != 0 && p[8][4] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][5] != 0 && p[8][5] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][6] != 0 && p[8][6] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][7] != 0 && p[8][7] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][8] != 0 && p[8][8] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check2() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][4] = 6;\n",
    "    p[0][5] = 1;\n",
    "    p[0][8] = 5;\n",
    "    p[1][0] = 8;\n",
    "    p[1][4] = 5;\n",
    "    p[2][6] = 8;\n",
    "    p[2][7] = 4;\n",
    "    p[2][8] = 7;\n",
    "    p[3][1] = 5;\n",
    "    p[3][6] = 9;\n",
    "    p[4][0] = 6;\n",
    "    p[4][3] = 9;\n",
    "    p[4][5] = 4;\n",
    "    p[4][8] = 8;\n",
    "    p[5][2] = 3;\n",
    "    p[5][7] = 1;\n",
    "    p[6][0] = 7;\n",
    "    p[6][1] = 9;\n",
    "    p[6][2] = 1;\n",
    "    p[7][4] = 8;\n",
    "    p[7][8] = 2;\n",
    "    p[8][0] = 5;\n",
    "    p[8][3] = 7;\n",
    "    p[8][4] = 3;\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check3() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][5] = 1;\n",
    "    p[0][6] = 2;\n",
    "    p[0][7] = 6;\n",
    "    p[1][6] = 7;\n",
    "    p[2][2] = 5;\n",
    "    p[2][4] = 3;\n",
    "    p[2][7] = 8;\n",
    "    p[3][0] = 2;\n",
    "    p[3][1] = 3;\n",
    "    p[3][2] = 6;\n",
    "    p[3][3] = 4;\n",
    "    p[3][7] = 9;\n",
    "    p[4][3] = 6;\n",
    "    p[4][5] = 9;\n",
    "    p[5][1] = 8;\n",
    "    p[5][5] = 2;\n",
    "    p[5][6] = 4;\n",
    "    p[5][7] = 7;\n",
    "    p[5][8] = 6;\n",
    "    p[6][1] = 5;\n",
    "    p[6][4] = 4;\n",
    "    p[6][6] = 1;\n",
    "    p[7][2] = 3;\n",
    "    p[8][1] = 9;\n",
    "    p[8][2] = 8;\n",
    "    p[8][3] = 7;\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check4() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][3] = 8;\n",
    "    p[1][4] = 7;\n",
    "    p[1][6] = 2;\n",
    "    p[1][8] = 9;\n",
    "    p[2][5] = 6;\n",
    "    p[2][7] = 1;\n",
    "    p[2][8] = 4;\n",
    "    p[3][1] = 8;\n",
    "    p[3][2] = 2;\n",
    "    p[3][7] = 7;\n",
    "    p[4][1] = 4;\n",
    "    p[4][3] = 3;\n",
    "    p[4][4] = 9;\n",
    "    p[4][5] = 2;\n",
    "    p[4][7] = 8;\n",
    "    p[5][1] = 5;\n",
    "    p[5][6] = 9;\n",
    "    p[5][7] = 2;\n",
    "    p[6][0] = 6;\n",
    "    p[6][1] = 3;\n",
    "    p[6][3] = 5;\n",
    "    p[7][0] = 5;\n",
    "    p[7][2] = 9;\n",
    "    p[7][4] = 1;\n",
    "    p[8][5] = 4;\n",
    "    \n",
    "    if(p[0][0] != 0 && p[0][0] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(22, 22, 46, 46);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][1] != 0 && p[0][1] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(72, 22, 46, 46);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][2] != 0 && p[0][2] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(122, 22, 46, 46);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][4] != 0 && p[0][4] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][5] != 0 && p[0][5] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][6] != 0 && p[0][6] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][7] != 0 && p[0][7] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][8] != 0 && p[0][8] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][0] != 0 && p[1][0] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][1] != 0 && p[1][1] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][2] != 0 && p[1][2] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][3] != 0 && p[1][3] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][5] != 0 && p[1][5] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][7] != 0 && p[1][7] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][0] != 0 && p[2][0] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][1] != 0 && p[2][1] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][2] != 0 && p[2][2] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][3] != 0 && p[2][3] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][4] != 0 && p[2][4] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][6] != 0 && p[2][6] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][0] != 0 && p[3][0] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][3] != 0 && p[3][3] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][4] != 0 && p[3][4] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][5] != 0 && p[3][5] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][6] != 0 && p[3][6] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][8] != 0 && p[3][8] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][0] != 0 && p[4][0] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][2] != 0 && p[4][2] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][6] != 0 && p[4][6] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][8] != 0 && p[4][8] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][0] != 0 && p[5][0] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][2] != 0 && p[5][2] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][3] != 0 && p[5][3] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][4] != 0 && p[5][4] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][5] != 0 && p[5][5] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][8] != 0 && p[5][8] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][2] != 0 && p[6][2] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][4] != 0 && p[6][4] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][5] != 0 && p[6][5] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][6] != 0 && p[6][6] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][7] != 0 && p[6][7] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][8] != 0 && p[6][8] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][1] != 0 && p[7][1] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][3] != 0 && p[7][3] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][5] != 0 && p[7][5] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][6] != 0 && p[7][6] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][7] != 0 && p[7][7] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][8] != 0 && p[7][8] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][0] != 0 && p[8][0] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][1] != 0 && p[8][1] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][2] != 0 && p[8][2] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][3] != 0 && p[8][3] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][4] != 0 && p[8][4] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][6] != 0 && p[8][6] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][7] != 0 && p[8][7] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][8] != 0 && p[8][8] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check5() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][1] = 9;\n",
    "    p[0][2] = 5;\n",
    "    p[0][4] = 3;\n",
    "    p[0][5] = 6;\n",
    "    p[1][0] = 4;\n",
    "    p[2][0] = 1;\n",
    "    p[2][3] = 8;\n",
    "    p[2][4] = 5;\n",
    "    p[2][6] = 6;\n",
    "    p[2][7] = 7;\n",
    "    p[3][0] = 2;\n",
    "    p[3][2] = 1;\n",
    "    p[4][0] = 9;\n",
    "    p[4][1] = 5;\n",
    "    p[4][7] = 8;\n",
    "    p[4][8] = 6;\n",
    "    p[5][6] = 2;\n",
    "    p[5][8] = 1;\n",
    "    p[6][1] = 7;\n",
    "    p[6][2] = 8;\n",
    "    p[6][4] = 9;\n",
    "    p[6][5] = 1;\n",
    "    p[6][8] = 4;\n",
    "    p[7][8] = 3;\n",
    "    p[8][3] = 2;\n",
    "    p[8][4] = 8;\n",
    "    p[8][6] = 9;\n",
    "    p[8][7] = 6;\n",
    "    \n",
    "    if(p[0][0] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][3] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][5] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][4] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][5] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][6] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][7] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][0] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][1] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][2] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][5] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][8] != 0) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check6() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][0] = 6;\n",
    "    p[0][3] = 5;\n",
    "    p[0][4] = 3;\n",
    "    p[0][8] = 7;\n",
    "    p[1][0] = 4;\n",
    "    p[1][2] = 1;\n",
    "    p[1][7] = 2;\n",
    "    p[2][1] = 9;\n",
    "    p[2][3] = 1;\n",
    "    p[2][5] = 4;\n",
    "    p[3][3] = 8;\n",
    "    p[3][7] = 9;\n",
    "    p[4][0] = 7;\n",
    "    p[4][2] = 4;\n",
    "    p[4][6] = 8;\n",
    "    p[4][8] = 2;\n",
    "    p[5][1] = 8;\n",
    "    p[5][5] = 5;\n",
    "    p[6][3] = 9;\n",
    "    p[6][5] = 1;\n",
    "    p[6][7] = 3;\n",
    "    p[7][1] = 3;\n",
    "    p[7][6] = 9;\n",
    "    p[7][8] = 5;\n",
    "    p[8][0] = 1;\n",
    "    p[8][4] = 5;\n",
    "    p[8][5] = 3;\n",
    "    p[8][8] = 6;\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check7() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][0] = 7;\n",
    "    p[0][4] = 2;\n",
    "    p[0][5] = 9;\n",
    "    p[0][7] = 1;\n",
    "    p[1][0] = 2;\n",
    "    p[1][4] = 4;\n",
    "    p[1][5] = 8;\n",
    "    p[2][0] = 8;\n",
    "    p[2][1] = 3;\n",
    "    p[2][4] = 6;\n",
    "    p[2][6] = 2;\n",
    "    p[3][0] = 4;\n",
    "    p[3][2] = 9;\n",
    "    p[3][5] = 6;\n",
    "    p[3][8] = 8;\n",
    "    p[4][0] = 3;\n",
    "    p[4][8] = 1;\n",
    "    p[5][0] = 5;\n",
    "    p[5][3] = 4;\n",
    "    p[5][6] = 6;\n",
    "    p[5][8] = 3;\n",
    "    p[6][2] = 2;\n",
    "    p[6][4] = 9;\n",
    "    p[6][7] = 3;\n",
    "    p[6][8] = 7;\n",
    "    p[7][3] = 6;\n",
    "    p[7][4] = 1;\n",
    "    p[7][8] = 2;\n",
    "    p[8][1] = 4;\n",
    "    p[8][3] = 2;\n",
    "    p[8][4] = 7;\n",
    "    p[8][8] = 6;\n",
    "    \n",
    "    if(p[0][1] != 0 && p[0][1] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][2] != 0 && p[0][2] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][3] != 0 && p[0][3] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][6] != 0 && p[0][6] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][8] != 0 && p[0][8] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][1] != 0 && p[1][1] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][2] != 0 && p[1][2] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][3] != 0 && p[1][3] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][6] != 0 && p[1][6] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][7] != 0 && p[1][7] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][8] != 0 && p[1][8] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][2] != 0 && p[2][2] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][3] != 0 && p[2][3] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][5] != 0 && p[2][5] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][7] != 0 && p[2][7] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][8] != 0 && p[2][8] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][1] != 0 && p[3][1] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][3] != 0 && p[3][3] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][4] != 0 && p[3][4] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][6] != 0 && p[3][6] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][7] != 0 && p[3][7] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][1] != 0 && p[4][1] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][2] != 0 && p[4][2] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][3] != 0 && p[4][3] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][4] != 0 && p[4][4] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][5] != 0 && p[4][5] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][6] != 0 && p[4][6] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[4][7] != 0 && p[4][7] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 220, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][1] != 0 && p[5][1] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][2] != 0 && p[5][2] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][4] != 0 && p[5][4] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(220, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[5][5] != 0 && p[5][5] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    if(p[5][7] != 0 && p[5][7] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 270, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][0] != 0 && p[6][0] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][1] != 0 && p[6][1] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][3] != 0 && p[6][3] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][5] != 0 && p[6][5] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[6][6] != 0 && p[6][6] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 320, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][0] != 0 && p[7][0] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][1] != 0 && p[7][1] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][2] != 0 && p[7][2] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][5] != 0 && p[7][5] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][6] != 0 && p[7][6] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[7][7] != 0 && p[7][7] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 370, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][0] != 0 && p[8][0] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][2] != 0 && p[8][2] != 3) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][5] != 0 && p[8][5] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][6] != 0 && p[8][6] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 420, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[8][7] != 0 && p[8][7] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check8() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][1] = 4;\n",
    "    p[0][2] = 1;\n",
    "    p[0][6] = 8;\n",
    "    p[1][7] = 5;\n",
    "    p[2][1] = 2;\n",
    "    p[2][3] = 7;\n",
    "    p[2][5] = 8;\n",
    "    p[2][6] = 4;\n",
    "    p[2][7] = 9;\n",
    "    p[3][0] = 2;\n",
    "    p[3][4] = 7;\n",
    "    p[3][5] = 9;\n",
    "    p[3][7] = 6;\n",
    "    p[4][2] = 9;\n",
    "    p[4][3] = 5;\n",
    "    p[4][4] = 3;\n",
    "    p[4][5] = 2;\n",
    "    p[4][6] = 1;\n",
    "    p[5][1] = 3;\n",
    "    p[5][3] = 6;\n",
    "    p[5][4] = 1;\n",
    "    p[5][8] = 9;\n",
    "    p[6][1] = 1;\n",
    "    p[6][2] = 2;\n",
    "    p[6][3] = 4;\n",
    "    p[6][5] = 5;\n",
    "    p[6][7] = 8;\n",
    "    p[7][1] = 8;\n",
    "    p[8][2] = 5;\n",
    "    p[8][5] = 1;\n",
    "    p[8][7] = 4;\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check9() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][3] = 6;\n",
    "    p[0][7] = 3;\n",
    "    p[0][1] = 1;\n",
    "    p[1][8] = 1;\n",
    "    p[1][3] = 5;\n",
    "    p[1][6] = 2;\n",
    "    p[1][7] = 9;\n",
    "    p[2][3] = 2;\n",
    "    p[2][6] = 6;\n",
    "    p[3][0] = 5;\n",
    "    p[3][4] = 6;\n",
    "    p[3][5] = 2;\n",
    "    p[4][1] = 6;\n",
    "    p[4][2] = 9;\n",
    "    p[4][4] = 8;\n",
    "    p[4][6] = 7;\n",
    "    p[4][7] = 4;\n",
    "    p[5][3] = 3;\n",
    "    p[5][4] = 7;\n",
    "    p[5][8] = 5;\n",
    "    p[6][2] = 6;\n",
    "    p[6][5] = 9;\n",
    "    p[7][1] = 3;\n",
    "    p[7][2] = 4;\n",
    "    p[7][5] = 1;\n",
    "    p[7][7] = 5;\n",
    "    p[8][0] = 7;\n",
    "    p[8][1] = 5;\n",
    "    p[8][5] = 6;\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check10() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][2] = 7;\n",
    "    p[0][5] = 6;\n",
    "    p[1][1] = 3;\n",
    "    p[1][5] = 5;\n",
    "    p[2][0] = 5;\n",
    "    p[2][1] = 6;\n",
    "    p[2][2] = 4;\n",
    "    p[2][4] = 1;\n",
    "    p[2][7] = 2;\n",
    "    p[3][0] = 2;\n",
    "    p[3][3] = 5;\n",
    "    p[3][4] = 6;\n",
    "    p[3][8] = 7;\n",
    "    p[4][2] = 5;\n",
    "    p[4][6] = 6;\n",
    "    p[5][0] = 8;\n",
    "    p[5][4] = 7;\n",
    "    p[5][5] = 2;\n",
    "    p[5][8] = 3;\n",
    "    p[6][1] = 8;\n",
    "    p[6][4] = 5;\n",
    "    p[6][6] = 7;\n",
    "    p[6][7] = 9;\n",
    "    p[6][8] = 4;\n",
    "    p[7][3] = 9;\n",
    "    p[7][7] = 3;\n",
    "    p[8][3] = 3;\n",
    "    p[8][6] = 5;\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check11() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][5] = 2;\n",
    "    p[0][6] = 5;\n",
    "    p[0][7] = 8;\n",
    "    p[1][0] = 1;\n",
    "    p[1][2] = 2;\n",
    "    p[1][8] = 7;\n",
    "    p[2][3] = 9;\n",
    "    p[2][4] = 7;\n",
    "    p[2][5] = 3;\n",
    "    p[2][6] = 2;\n",
    "    p[2][7] = 6;\n",
    "    p[3][3] = 5;\n",
    "    p[3][4] = 8;\n",
    "    p[3][5] = 4;\n",
    "    p[3][6] = 3;\n",
    "    p[3][7] = 1;\n",
    "    p[4][0] = 2;\n",
    "    p[4][3] = 6;\n",
    "    p[4][5] = 7;\n",
    "    p[4][8] = 5;\n",
    "    p[5][1] = 5;\n",
    "    p[5][2] = 8;\n",
    "    p[5][3] = 2;\n",
    "    p[5][4] = 1;\n",
    "    p[5][5] = 9;\n",
    "    p[6][1] = 7;\n",
    "    p[6][2] = 9;\n",
    "    p[6][3] = 8;\n",
    "    p[6][4] = 2;\n",
    "    p[6][5] = 5;\n",
    "    p[7][0] = 5;\n",
    "    p[7][6] = 7;\n",
    "    p[7][8] = 9;\n",
    "    p[8][1] = 2;\n",
    "    p[8][2] = 3;\n",
    "    p[8][3] = 7;\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "void check12() {\n",
    "    strokeWeight(1);\n",
    "    textSize(20);\n",
    "    \n",
    "    boolean right = true; // all answers assumed to be initially true\n",
    "    \n",
    "    p[0][0] = 5;\n",
    "    p[0][4] = 9;\n",
    "    p[0][5] = 4;\n",
    "    p[0][6] = 6;\n",
    "    p[0][7] = 3;\n",
    "    p[1][0] = 1;\n",
    "    p[1][1] = 7;\n",
    "    p[1][3] = 3;\n",
    "    p[1][4] = 6;\n",
    "    p[1][6] = 9;\n",
    "    p[1][8] = 2;\n",
    "    p[2][1] = 3;\n",
    "    p[2][4] = 2;\n",
    "    p[2][7] = 4;\n",
    "    p[3][0] = 7;\n",
    "    p[3][8] = 8;\n",
    "    p[4][0] = 2;\n",
    "    p[4][3] = 7;\n",
    "    p[4][5] = 1;\n",
    "    p[4][8] = 6;\n",
    "    p[5][0] = 3;\n",
    "    p[5][8] = 4;\n",
    "    p[6][1] = 9;\n",
    "    p[6][4] = 7;\n",
    "    p[6][7] = 2;\n",
    "    p[7][0] = 4;\n",
    "    p[7][2] = 1;\n",
    "    p[7][4] = 8;\n",
    "    p[7][5] = 9;\n",
    "    p[7][7] = 6;\n",
    "    p[7][8] = 3;\n",
    "    p[8][1] = 2;\n",
    "    p[8][2] = 7;\n",
    "    p[8][3] = 4;\n",
    "    p[8][4] = 1;\n",
    "    p[8][8] = 9;\n",
    "    \n",
    "    if(p[0][1] != 0 && p[0][1] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][2] != 0 && p[0][2] != 2) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][3] != 0 && p[0][3] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[0][8] != 0 && p[0][8] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 20, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][2] != 0 && p[1][2] != 4) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][5] != 0 && p[1][5] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[1][7] != 0 && p[1][7] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(370, 70, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][0] != 0 && p[2][0] != 9) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(20, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][2] != 0 && p[2][0] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(120, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][3] != 0 && p[2][3] != 8) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(170, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][5] != 0 && p[2][5] != 7) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(270, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][6] != 0 && p[2][6] != 1) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(320, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[2][8] != 0 && p[2][8] != 5) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(420, 120, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(p[3][1] != 0 && p[3][1] != 6) {\n",
    "        fill(255, 102, 102);\n",
    "        rect(70, 170, 50, 50);\n",
    "        \n",
    "        right = false;\n",
    "    }\n",
    "    \n",
    "    if(!right) {\n",
    "        fill(255, 0, 0);\n",
    "        text(\"Something isn't right in the highlighted cell(s).\", 500, 400);\n",
    "    }\n",
    "}\n",
    "\n",
    "boolean checkBox(int number) {\n",
    "    int sum = 0;\n",
    "    \n",
    "    if(number == 0) {\n",
    "        for(int i = 0; i < 3; i++) {\n",
    "            for(int j = 0; j < 3; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 1) {\n",
    "        for(int i = 0; i < 3; i++) {\n",
    "            for(int j = 3; j < 6; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 2) {\n",
    "        for(int i = 0; i < 3; i++) {\n",
    "            for(int j = 6; j < 9; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 3) {\n",
    "        for(int i = 3; i < 6; i++) {\n",
    "            for(int j = 0; j < 3; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 4) {\n",
    "        for(int i = 3; i < 6; i++) {\n",
    "            for(int j = 3; j < 6; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 5) {\n",
    "        for(int i = 3; i < 6; i++) {\n",
    "            for(int j = 6; j < 9; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 6) {\n",
    "        for(int i = 6; i < 9; i++) {\n",
    "            for(int j = 0; j < 3; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 7) {\n",
    "        for(int i = 6; i < 9; i++) {\n",
    "            for(int j = 3; j < 6; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    } else if(number == 8) {\n",
    "        for(int i = 6; i < 9; i++) {\n",
    "            for(int j = 6; j < 9; j++) {\n",
    "                sum += p[i][j];\n",
    "            }\n",
    "        }\n",
    "    }\n",
    "    \n",
    "    if(sum == 45) {\n",
    "        return true;\n",
    "    } else {\n",
    "        return false;\n",
    "    }\n",
    "}\n",
    "\n",
    "boolean checkColumn(int number) {\n",
    "    int sum = 0;\n",
    "    \n",
    "    for(int i = 0; i < p.length; i++) {\n",
    "        sum += p[i][num];\n",
    "    }\n",
    "    \n",
    "    if(sum == 45) {\n",
    "        return true;\n",
    "    } else {\n",
    "        return false;\n",
    "    }\n",
    "}\n",
    "\n",
    "boolean checkCompletion() {\n",
    "    for(int i = 0; i < p.length; i++) {\n",
    "        for(int j = 0; j < p[i].length; j++) {\n",
    "            if(p[i][j] == 0) {\n",
    "                i = p.length;\n",
    "                j = p[i].length;\n",
    "\n",
    "                return false;\n",
    "            }\n",
    "        }\n",
    "    }\n",
    "    \n",
    "    return true;\n",
    "}\n",
    "\n",
    "boolean checkRow(int number) {\n",
    "    int sum = 0;\n",
    "    \n",
    "    for(int i = 0; i < p[number].length; i++) {\n",
    "        sum += p[number][i];\n",
    "    }\n",
    "    \n",
    "    if(sum == 45) {\n",
    "        return true;\n",
    "    } else {\n",
    "        return false;\n",
    "    }\n",
    "}\n",
    "\n",
    "boolean checkWin() {\n",
    "    for(int i = 0; i < 9; i++) {\n",
    "        if(!checkRow(i) || !checkColumn(i) || !checkBox(i)) {\n",
    "            i = 9;\n",
    "            return false;\n",
    "        }\n",
    "    }\n",
    "    \n",
    "    return true;\n",
    "}\n",
    "\n",
    "void choosePuzzle() {\n",
    "    int puzzle = (int)(random(12) + 1);\n",
    "    \n",
    "    println(\"Puzzle \" + puzzle);\n",
    "    \n",
    "    if(puzzle == 1) {\n",
    "        puzzle1();\n",
    "        p1 = true;\n",
    "    } else if(puzzle == 2) {\n",
    "        puzzle2();\n",
    "        p2 = true;\n",
    "    } else if(puzzle == 3) {\n",
    "        puzzle3();\n",
    "        p3 = true;\n",
    "    } else if(puzzle == 4) {\n",
    "        puzzle4();\n",
    "        p4 = true;\n",
    "    } else if(puzzle == 5) {\n",
    "        puzzle5();\n",
    "        p5 = true;\n",
    "    } else if(puzzle == 6) {\n",
    "        puzzle6();\n",
    "        p6 = true;\n",
    "    } else if(puzzle == 7) {\n",
    "        puzzle7();\n",
    "        p7 = true;\n",
    "    } else if(puzzle == 8) {\n",
    "        puzzle8();\n",
    "        p8 = true;\n",
    "    } else if(puzzle == 9) {\n",
    "        puzzle9();\n",
    "        p9 = true;\n",
    "    } else if(puzzle == 10) {\n",
    "        puzzle10();\n",
    "        p10 = true;\n",
    "    } else if(puzzle == 11) {\n",
    "        puzzle11();\n",
    "        p11 = true;\n",
    "    } else if(puzzle == 12) {\n",
    "        puzzle12();\n",
    "        p12 = true;\n",
    "    }\n",
    "}\n",
    "\n",
    "void completed() {\n",
    "    if(checkWin()) {\n",
    "        textSize(20);\n",
    "        fill(0, 128, 0);\n",
    "        text(\"Congratulations! You solved the puzzle\", 500, 400);\n",
    "        text(\"correctly. 😃\", 500, 430);\n",
    "    } else {\n",
    "        textSize(20);\n",
    "        fill(255, 0, 0);\n",
    "        text(\"😞 Sorry! Your solution to this puzzle is\", 500, 430);\n",
    "        text(\"incorrect. Please try again!\", 500, 460);\n",
    "    }\n",
    "}\n",
    "\n",
    "void displayBoard() {\n",
    "    textSize(30); // sets the text size to 30\n",
    "    fill(0); // sets the text color to black\n",
    "    \n",
    "    int x = 37;\n",
    "    int y = 55;\n",
    "    \n",
    "    for(int i = 0; i < p.length; i++) {\n",
    "        for(int j = 0; j < p[i].length; j++) {\n",
    "            if(p[i][j] != 0) {\n",
    "                text(str(p[i][j]), x, y);\n",
    "            }\n",
    "            \n",
    "            x += 50;\n",
    "        }\n",
    "        \n",
    "        x = 37;\n",
    "        y += 50;\n",
    "    }\n",
    "}\n",
    "\n",
    "void getCell(int x, int y) {\n",
    "    if(x > 20 && x < 70) {\n",
    "        col = 0;\n",
    "    } else if(x < 120) {\n",
    "        col = 1;\n",
    "    } else if(x < 170) {\n",
    "        col = 2;\n",
    "    } else if(x < 220) {\n",
    "        col = 3;\n",
    "    } else if(x < 270) {\n",
    "        col = 4;\n",
    "    } else if(x < 320) {\n",
    "        col = 5;\n",
    "    } else if(x < 370) {\n",
    "        col = 6;\n",
    "    } else if(x < 420) {\n",
    "        col = 7;\n",
    "    } else if(x < 470) {\n",
    "        col = 8;\n",
    "    }\n",
    "    \n",
    "    if(y > 20 && y < 70) {\n",
    "        row = 0;\n",
    "    } else if(y < 120) {\n",
    "        row = 1;\n",
    "    } else if(y < 170) {\n",
    "        row = 2;\n",
    "    } else if(y < 220) {\n",
    "        row = 3;\n",
    "    } else if(y < 270) {\n",
    "        row = 4;\n",
    "    } else if(y < 320) {\n",
    "        row = 5;\n",
    "    } else if(y < 370) {\n",
    "        row = 6;\n",
    "    } else if(y < 420) {\n",
    "        row = 7;\n",
    "    } else if(y < 470) {\n",
    "        row = 8;\n",
    "    }\n",
    "}\n",
    "\n",
    "void grid() {\n",
    "    background(255);\n",
    "    fill(255);\n",
    "    \n",
    "    strokeWeight(9); // thick lines\n",
    "    \n",
    "    // outer box\n",
    "    line(20, 20, 20, 470);\n",
    "    line(20, 20, 470, 20);\n",
    "    line(470, 470, 470, 20);\n",
    "    line(470, 470, 20, 470);\n",
    "    \n",
    "    strokeWeight(3); // thin lines\n",
    "    \n",
    "    int x = 20;\n",
    "    int y = 20;\n",
    "    int w = 50;\n",
    "    int h = 50;\n",
    "    \n",
    "    int[][] cells = new int[9][9];\n",
    "    \n",
    "    for(int i = 0; i < 9; i++) {\n",
    "        for(int j = 0; j < 9; j++) {\n",
    "            rect(x, y, w, h);\n",
    "            x += 50;\n",
    "        }\n",
    "        \n",
    "        x = 20;\n",
    "        y += 50;\n",
    "    }\n",
    "    \n",
    "    strokeWeight(7); // thick lines for 3x3 boxes\n",
    "    \n",
    "    // separating for 3x3 boxes\n",
    "    line(20, 170, 470, 170); // top horizontal line\n",
    "    line(20, 320, 470, 320); // bottom horizontal line\n",
    "    line(170, 20, 170, 470); // left vertical line\n",
    "    line(320, 20, 320, 470); // right vertical line\n",
    "}\n",
    "\n",
    "void instructions() {\n",
    "    textSize(20);\n",
    "    fill(0);\n",
    "    \n",
    "    for(int i = 0; i < 4; i++) {\n",
    "        text(\"Instructions\", 500, 50);\n",
    "    }\n",
    "    \n",
    "    strokeWeight(3);\n",
    "    line(500, 55, 602, 55);\n",
    "    \n",
    "    int ty1 = 85; // y position of the first line of the first paragraph\n",
    "    int ty2 = 210; // y position of the first line of the second paragraph\n",
    "    int ty3 = ty2 + 100; // y position of the first line of the third paragraph\n",
    "    \n",
    "    text(\"Using the numbers 1 through 9, fill in the grid\", 500, ty1);\n",
    "    text(\"so that each row, column, and 3x3 box \", 500, ty1 + 25);\n",
    "    text(\"contains the each of the nine numbers only\", 500, ty1 + 50);\n",
    "    text(\"once.\", 500, ty1 + 75);\n",
    "    \n",
    "    text(\"To select a cell, hover over a desired cell and \", 500, ty2);\n",
    "    text(\"click on it. If you made a mistake, press\", 500, ty2 + 25);\n",
    "    text(\"0 to get rid of the number and clear the cell.\", 500, ty2 + 50);\n",
    "    \n",
    "    text(\"If you want to change the puzzle, please\", 500, ty3);\n",
    "    text(\"press the r key.\", 500, ty3 + 25);\n",
    "}\n",
    "\n",
    "void keyPressed() {\n",
    "    if (key == '0') {\n",
    "        num = 0;\n",
    "        updateArray();\n",
    "    } else if(key == '1') {\n",
    "        num = 1;\n",
    "        updateArray();\n",
    "    } else if(key == '2') {\n",
    "        num = 2;\n",
    "        updateArray();\n",
    "    } else if(key == '3') {\n",
    "        num = 3;\n",
    "        updateArray();\n",
    "    } else if(key == '4') {\n",
    "        num = 4;\n",
    "        updateArray();\n",
    "    } else if(key == '5') {\n",
    "        num = 5;\n",
    "        updateArray();\n",
    "    } else if(key == '6') {\n",
    "        num = 6;\n",
    "        updateArray();\n",
    "    } else if(key == '7') {\n",
    "        num = 7;\n",
    "        updateArray();\n",
    "    } else if(key == '8') {\n",
    "        num = 8;\n",
    "        updateArray();\n",
    "    } else if(key == '9') {\n",
    "        num = 9;\n",
    "        updateArray();\n",
    "    } else if(key == 'r' || key == 'R') {\n",
    "        setup();\n",
    "    }\n",
    "}\n",
    "\n",
    "void mousePressed() {\n",
    "    num = 0;\n",
    "    getCell(mouseX, mouseY);\n",
    "}\n",
    "\n",
    "void puzzle1() {\n",
    "    // www.websudoku.com – Evil Puzzle 124\n",
    "    \n",
    "    p[0][5] = 3;\n",
    "    p[0][8] = 6;\n",
    "    p[1][3] = 7;\n",
    "    p[1][8] = 9;\n",
    "    p[2][2] = 4;\n",
    "    p[2][4] = 6;\n",
    "    p[2][7] = 8;\n",
    "    p[2][8] = 2;\n",
    "    p[3][4] = 9;\n",
    "    p[3][7] = 7;\n",
    "    p[4][1] = 1;\n",
    "    p[4][2] = 6;\n",
    "    p[4][6] = 8;\n",
    "    p[4][7] = 5;\n",
    "    p[5][1] = 2;\n",
    "    p[5][4] = 3;\n",
    "    p[6][0] = 2;\n",
    "    p[6][1] = 8;\n",
    "    p[6][4] = 5;\n",
    "    p[6][6] = 6;\n",
    "    p[7][0] = 3;\n",
    "    p[7][5] = 8;\n",
    "    p[8][0] = 7;\n",
    "    p[8][3] = 1;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle2() {\n",
    "    // www.websudoku.com – Evil Puzzle 6,101,976,392\n",
    "    \n",
    "    p[0][4] = 6;\n",
    "    p[0][5] = 1;\n",
    "    p[0][8] = 5;\n",
    "    p[1][0] = 8;\n",
    "    p[1][4] = 5;\n",
    "    p[2][6] = 8;\n",
    "    p[2][7] = 4;\n",
    "    p[2][8] = 7;\n",
    "    p[3][1] = 5;\n",
    "    p[3][6] = 9;\n",
    "    p[4][0] = 6;\n",
    "    p[4][3] = 9;\n",
    "    p[4][5] = 4;\n",
    "    p[4][8] = 8;\n",
    "    p[5][2] = 3;\n",
    "    p[5][7] = 1;\n",
    "    p[6][0] = 7;\n",
    "    p[6][1] = 9;\n",
    "    p[6][2] = 1;\n",
    "    p[7][4] = 8;\n",
    "    p[7][8] = 2;\n",
    "    p[8][0] = 5;\n",
    "    p[8][3] = 7;\n",
    "    p[8][4] = 3;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle3() {\n",
    "    // www.websudoku.com – Evil Puzzle 8,655,032,120\n",
    "    \n",
    "    p[0][5] = 1;\n",
    "    p[0][6] = 2;\n",
    "    p[0][7] = 6;\n",
    "    p[1][6] = 7;\n",
    "    p[2][2] = 5;\n",
    "    p[2][4] = 3;\n",
    "    p[2][7] = 8;\n",
    "    p[3][0] = 2;\n",
    "    p[3][1] = 3;\n",
    "    p[3][2] = 6;\n",
    "    p[3][3] = 4;\n",
    "    p[3][7] = 9;\n",
    "    p[4][3] = 6;\n",
    "    p[4][5] = 9;\n",
    "    p[5][1] = 8;\n",
    "    p[5][5] = 2;\n",
    "    p[5][6] = 4;\n",
    "    p[5][7] = 7;\n",
    "    p[5][8] = 6;\n",
    "    p[6][1] = 5;\n",
    "    p[6][4] = 4;\n",
    "    p[6][6] = 1;\n",
    "    p[7][2] = 3;\n",
    "    p[8][1] = 9;\n",
    "    p[8][2] = 8;\n",
    "    p[8][3] = 7;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle4() {\n",
    "    // www.websudoku.com – Evil Puzzle 8,895,091,461\n",
    "    \n",
    "    p[0][3] = 8;\n",
    "    p[1][4] = 7;\n",
    "    p[1][6] = 2;\n",
    "    p[1][8] = 9;\n",
    "    p[2][5] = 6;\n",
    "    p[2][7] = 1;\n",
    "    p[2][8] = 4;\n",
    "    p[3][1] = 8;\n",
    "    p[3][2] = 2;\n",
    "    p[3][7] = 7;\n",
    "    p[4][1] = 4;\n",
    "    p[4][3] = 3;\n",
    "    p[4][4] = 9;\n",
    "    p[4][5] = 2;\n",
    "    p[4][7] = 8;\n",
    "    p[5][1] = 5;\n",
    "    p[5][6] = 9;\n",
    "    p[5][7] = 2;\n",
    "    p[6][0] = 6;\n",
    "    p[6][1] = 3;\n",
    "    p[6][3] = 5;\n",
    "    p[7][0] = 5;\n",
    "    p[7][2] = 9;\n",
    "    p[7][4] = 1;\n",
    "    p[8][5] = 4;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle5() {\n",
    "    // www.websudoku.com – Hard Puzzle 3,864,710,980\n",
    "    \n",
    "    p[0][1] = 9;\n",
    "    p[0][2] = 5;\n",
    "    p[0][4] = 3;\n",
    "    p[0][5] = 6;\n",
    "    p[1][0] = 4;\n",
    "    p[2][0] = 1;\n",
    "    p[2][3] = 8;\n",
    "    p[2][4] = 5;\n",
    "    p[2][6] = 6;\n",
    "    p[2][7] = 7;\n",
    "    p[3][0] = 2;\n",
    "    p[3][2] = 1;\n",
    "    p[4][0] = 9;\n",
    "    p[4][1] = 5;\n",
    "    p[4][7] = 8;\n",
    "    p[4][8] = 6;\n",
    "    p[5][6] = 2;\n",
    "    p[5][8] = 1;\n",
    "    p[6][1] = 7;\n",
    "    p[6][2] = 8;\n",
    "    p[6][4] = 9;\n",
    "    p[6][5] = 1;\n",
    "    p[6][8] = 4;\n",
    "    p[7][8] = 3;\n",
    "    p[8][3] = 2;\n",
    "    p[8][4] = 8;\n",
    "    p[8][6] = 9;\n",
    "    p[8][7] = 6;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle6() {\n",
    "    // www.websudoku.com – Hard Puzzle 9,934,487,744\n",
    "    \n",
    "    p[0][0] = 6;\n",
    "    p[0][3] = 5;\n",
    "    p[0][4] = 3;\n",
    "    p[0][8] = 7;\n",
    "    p[1][0] = 4;\n",
    "    p[1][2] = 1;\n",
    "    p[1][7] = 2;\n",
    "    p[2][1] = 9;\n",
    "    p[2][3] = 1;\n",
    "    p[2][5] = 4;\n",
    "    p[3][3] = 8;\n",
    "    p[3][7] = 9;\n",
    "    p[4][0] = 7;\n",
    "    p[4][2] = 4;\n",
    "    p[4][6] = 8;\n",
    "    p[4][8] = 2;\n",
    "    p[5][1] = 8;\n",
    "    p[5][5] = 5;\n",
    "    p[6][3] = 9;\n",
    "    p[6][5] = 1;\n",
    "    p[6][7] = 3;\n",
    "    p[7][1] = 3;\n",
    "    p[7][6] = 9;\n",
    "    p[7][8] = 5;\n",
    "    p[8][0] = 1;\n",
    "    p[8][4] = 5;\n",
    "    p[8][5] = 3;\n",
    "    p[8][8] = 6;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle7() {\n",
    "    // www.websudoku.com – Medium Puzzle 2,981,621,299\n",
    "    \n",
    "    p[0][0] = 7;\n",
    "    p[0][4] = 2;\n",
    "    p[0][5] = 9;\n",
    "    p[0][7] = 1;\n",
    "    p[1][0] = 2;\n",
    "    p[1][4] = 4;\n",
    "    p[1][5] = 8;\n",
    "    p[2][0] = 8;\n",
    "    p[2][1] = 3;\n",
    "    p[2][4] = 6;\n",
    "    p[2][6] = 2;\n",
    "    p[3][0] = 4;\n",
    "    p[3][2] = 9;\n",
    "    p[3][5] = 6;\n",
    "    p[3][8] = 8;\n",
    "    p[4][0] = 3;\n",
    "    p[4][8] = 1;\n",
    "    p[5][0] = 5;\n",
    "    p[5][3] = 4;\n",
    "    p[5][6] = 6;\n",
    "    p[5][8] = 3;\n",
    "    p[6][2] = 2;\n",
    "    p[6][4] = 9;\n",
    "    p[6][7] = 3;\n",
    "    p[6][8] = 7;\n",
    "    p[7][3] = 6;\n",
    "    p[7][4] = 1;\n",
    "    p[7][8] = 2;\n",
    "    p[8][1] = 4;\n",
    "    p[8][3] = 2;\n",
    "    p[8][4] = 7;\n",
    "    p[8][8] = 6;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle8() {\n",
    "    // www.websudoku.com – Medium Puzzle 3,075,869,438\n",
    "    \n",
    "    p[0][1] = 4;\n",
    "    p[0][2] = 1;\n",
    "    p[0][6] = 8;\n",
    "    p[1][7] = 5;\n",
    "    p[2][1] = 2;\n",
    "    p[2][3] = 7;\n",
    "    p[2][5] = 8;\n",
    "    p[2][6] = 4;\n",
    "    p[2][7] = 9;\n",
    "    p[3][0] = 2;\n",
    "    p[3][4] = 7;\n",
    "    p[3][5] = 9;\n",
    "    p[3][7] = 6;\n",
    "    p[4][2] = 9;\n",
    "    p[4][3] = 5;\n",
    "    p[4][4] = 3;\n",
    "    p[4][5] = 2;\n",
    "    p[4][6] = 1;\n",
    "    p[5][1] = 3;\n",
    "    p[5][3] = 6;\n",
    "    p[5][4] = 1;\n",
    "    p[5][8] = 9;\n",
    "    p[6][1] = 1;\n",
    "    p[6][2] = 2;\n",
    "    p[6][3] = 4;\n",
    "    p[6][5] = 5;\n",
    "    p[6][7] = 8;\n",
    "    p[7][1] = 8;\n",
    "    p[8][2] = 5;\n",
    "    p[8][5] = 1;\n",
    "    p[8][7] = 4;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle9() {\n",
    "    // www.websudoku.com – Medium Puzzle 6,569,172,006\n",
    "    \n",
    "    p[0][3] = 6;\n",
    "    p[0][7] = 3;\n",
    "    p[0][1] = 1;\n",
    "    p[1][8] = 1;\n",
    "    p[1][3] = 5;\n",
    "    p[1][6] = 2;\n",
    "    p[1][7] = 9;\n",
    "    p[2][3] = 2;\n",
    "    p[2][6] = 6;\n",
    "    p[3][0] = 5;\n",
    "    p[3][4] = 6;\n",
    "    p[3][5] = 2;\n",
    "    p[4][1] = 6;\n",
    "    p[4][2] = 9;\n",
    "    p[4][4] = 8;\n",
    "    p[4][6] = 7;\n",
    "    p[4][7] = 4;\n",
    "    p[5][3] = 3;\n",
    "    p[5][4] = 7;\n",
    "    p[5][8] = 5;\n",
    "    p[6][2] = 6;\n",
    "    p[6][5] = 9;\n",
    "    p[7][1] = 3;\n",
    "    p[7][2] = 4;\n",
    "    p[7][5] = 1;\n",
    "    p[7][7] = 5;\n",
    "    p[8][0] = 7;\n",
    "    p[8][1] = 5;\n",
    "    p[8][5] = 6;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle10() {\n",
    "    // www.websudoku.com – Medium Puzzle 8,136,223,360\n",
    "    \n",
    "    p[0][2] = 7;\n",
    "    p[0][5] = 6;\n",
    "    p[1][1] = 3;\n",
    "    p[1][5] = 5;\n",
    "    p[2][0] = 5;\n",
    "    p[2][1] = 6;\n",
    "    p[2][2] = 4;\n",
    "    p[2][4] = 1;\n",
    "    p[2][7] = 2;\n",
    "    p[3][0] = 2;\n",
    "    p[3][3] = 5;\n",
    "    p[3][4] = 6;\n",
    "    p[3][8] = 7;\n",
    "    p[4][2] = 5;\n",
    "    p[4][6] = 6;\n",
    "    p[5][0] = 8;\n",
    "    p[5][4] = 7;\n",
    "    p[5][5] = 2;\n",
    "    p[5][8] = 3;\n",
    "    p[6][1] = 8;\n",
    "    p[6][4] = 5;\n",
    "    p[6][6] = 7;\n",
    "    p[6][7] = 9;\n",
    "    p[6][8] = 4;\n",
    "    p[7][3] = 9;\n",
    "    p[7][7] = 3;\n",
    "    p[8][3] = 3;\n",
    "    p[8][6] = 5;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle11() {\n",
    "    // www.websudoku.com – Easy Puzzle 314,794,788\n",
    "    \n",
    "    p[0][5] = 2;\n",
    "    p[0][6] = 5;\n",
    "    p[0][7] = 8;\n",
    "    p[1][0] = 1;\n",
    "    p[1][2] = 2;\n",
    "    p[1][8] = 7;\n",
    "    p[2][3] = 9;\n",
    "    p[2][4] = 7;\n",
    "    p[2][5] = 3;\n",
    "    p[2][6] = 2;\n",
    "    p[2][7] = 6;\n",
    "    p[3][3] = 5;\n",
    "    p[3][4] = 8;\n",
    "    p[3][5] = 4;\n",
    "    p[3][6] = 3;\n",
    "    p[3][7] = 1;\n",
    "    p[4][0] = 2;\n",
    "    p[4][3] = 6;\n",
    "    p[4][5] = 7;\n",
    "    p[4][8] = 5;\n",
    "    p[5][1] = 5;\n",
    "    p[5][2] = 8;\n",
    "    p[5][3] = 2;\n",
    "    p[5][4] = 1;\n",
    "    p[5][5] = 9;\n",
    "    p[6][1] = 7;\n",
    "    p[6][2] = 9;\n",
    "    p[6][3] = 8;\n",
    "    p[6][4] = 2;\n",
    "    p[6][5] = 5;\n",
    "    p[7][0] = 5;\n",
    "    p[7][6] = 7;\n",
    "    p[7][8] = 9;\n",
    "    p[8][1] = 2;\n",
    "    p[8][2] = 3;\n",
    "    p[8][3] = 7;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void puzzle12() {\n",
    "    // www.websudoku.com – Easy Puzzle 2,006,736,503\n",
    "    \n",
    "    p[0][0] = 5;\n",
    "    p[0][4] = 9;\n",
    "    p[0][5] = 4;\n",
    "    p[0][6] = 6;\n",
    "    p[0][7] = 3;\n",
    "    p[1][0] = 1;\n",
    "    p[1][1] = 7;\n",
    "    p[1][3] = 3;\n",
    "    p[1][4] = 6;\n",
    "    p[1][6] = 9;\n",
    "    p[1][8] = 2;\n",
    "    p[2][1] = 3;\n",
    "    p[2][4] = 2;\n",
    "    p[2][7] = 4;\n",
    "    p[3][0] = 7;\n",
    "    p[3][8] = 8;\n",
    "    p[4][0] = 2;\n",
    "    p[4][3] = 7;\n",
    "    p[4][5] = 1;\n",
    "    p[4][8] = 6;\n",
    "    p[5][0] = 3;\n",
    "    p[5][8] = 4;\n",
    "    p[6][1] = 9;\n",
    "    p[6][4] = 7;\n",
    "    p[6][7] = 2;\n",
    "    p[7][0] = 4;\n",
    "    p[7][2] = 1;\n",
    "    p[7][4] = 8;\n",
    "    p[7][5] = 9;\n",
    "    p[7][7] = 6;\n",
    "    p[7][8] = 3;\n",
    "    p[8][1] = 2;\n",
    "    p[8][2] = 7;\n",
    "    p[8][3] = 4;\n",
    "    p[8][4] = 1;\n",
    "    p[8][8] = 9;\n",
    "    \n",
    "    displayBoard();\n",
    "}\n",
    "\n",
    "void updateAndDisplay() {\n",
    "    num = 0;\n",
    "    \n",
    "    grid();\n",
    "    \n",
    "    if(p1) {\n",
    "        check1();\n",
    "    } else if(p2) {\n",
    "        check2();\n",
    "    } else if(p3) {\n",
    "        check3();\n",
    "    } else if(p4) {\n",
    "        check4();\n",
    "    } else if(p5) {\n",
    "        check5();\n",
    "    } else if(p6) {\n",
    "        check6();\n",
    "    } else if(p7) {\n",
    "        check7();\n",
    "    } else if(p8) {\n",
    "        check8();\n",
    "    } else if(p9) {\n",
    "        check9();\n",
    "    } else if(p10) {\n",
    "        check10();\n",
    "    } else if(p11) {\n",
    "        check11();\n",
    "    } else if(p12) {\n",
    "        check12();\n",
    "    }\n",
    "    \n",
    "    displayBoard();\n",
    "    \n",
    "    instructions();\n",
    "    \n",
    "    if(checkCompletion()) {\n",
    "        completed();\n",
    "    }\n",
    "}\n",
    "\n",
    "void updateArray() {\n",
    "    p[row][col] = num;\n",
    "\n",
    "    updateAndDisplay();\n",
    "}\n",
    "\n",
    "void setup() {\n",
    "    size(900, 500);\n",
    "    background(255, 255, 255);\n",
    "    \n",
    "    p1 = false;\n",
    "    p2 = false;\n",
    "    p3 = false;\n",
    "    p4 = true;\n",
    "    p5 = false;\n",
    "    p6 = false;\n",
    "    p7 = false;\n",
    "    p8 = false;\n",
    "    p9 = false;\n",
    "    p10 = false;\n",
    "    p11 = false;\n",
    "    \n",
    "    for(int i = 0; i < p.length; i++) {\n",
    "        for(int j = 0; j < p[i].length; j++) {\n",
    "            p[i][j] = 0;\n",
    "        }\n",
    "    }\n",
    "    \n",
    "    grid();\n",
    "    instructions();\n",
    "    choosePuzzle();\n",
    "}"
   ]
  },
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   "cell_type": "raw",
   "metadata": {
    "collapsed": true
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   "source": []
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