Sudoku for your Website

Show candidates New:

Solve:
Clear:

This HTML5 and JavaScript game enables several setting options. It's a modified version of the SudokuJS software created by Jonas Ohlsson. You can either generate a simple Sudoku game or you can use the features such as the Sudoku solver, the degree of difficulty buttons or the candidates toggle.

You can put this Sudoku game on your own website for free. Download the game source files or copy the following HTML code.

Sudoku HTML Code

<!--
This Sudoku game is licensed under the MIT license:

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
-->

<style>
.sudoku-board {
 min-height: 22.75rem;
 margin-top: 3px;
 margin-bottom: 1em;
}

.sudoku-board-cell {
 display: inline-block;
 position: relative;
 border: 1px solid #ddd;
 background: white;
 max-width: 11.11111%;
}

[data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(9n+1) {
 border-left-width: 2px;
 border-left-color: #808080;
}

[data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n):nth-of-type(-n+9) {
 border-top-width: 2px;
 border-top-color: #808080;
}

[data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(3n) {
 border-right-width: 2px;
 border-right-color: #808080;
}

[data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n+19):nth-of-type(-n+27),
[data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n+46):nth-of-type(-n+54),
[data-board-size="9"].sudoku-board .sudoku-board-cell:nth-of-type(n+73):nth-of-type(-n+81) {
 border-bottom-width: 2px;
 border-bottom-color: #808080;
}

.sudoku-board-cell input {
 background: none;
 font-size: 19.2px;
 font-size: 1.2rem;
 text-align: center;
 width: 2em;
 max-width: 100%;
 height: 2em;
 border: 0;
 position: relative;
 z-index: 1; /*on top of candidates*/
}

.sudoku-board-cell .highlight-val {
 color: #00d;
}

.sudoku-board-cell .board-cell--error {
 background: #d00;
 color: #eee;
}

.sudoku-board-cell .candidates {
 display: none; /*hidden by default*/
 position: absolute;
 top: 0; bottom: 0; left: 0; right: 0;
 text-align: center;
 font-size: .75em;
 letter-spacing: -.5px;
 font-family: monospace, sans-serif;
 line-height: 0;
 text-align: justify;
}

.sudoku-board .candidates:after {
 content: "";
 display: inline-block;
 width: 100%;
}

@media(max-width: 23em){
 .sudoku-board .candidates {
  letter-spacing: -2px;
 }
}
 .showCandidates .candidates {
  display: block;
 }

.sudoku-board .candidates div {
 display: inline-block;
 width: 20%;
 line-height: 1.13;
 vertical-align: top;
 *display: inline;
 *zoom: 1;
}

.candidate--highlight {
 background-color: yellow;
}
.candidate--to-remove {
 background-color: red;
 color: white;
}

.sudokubutton1,.sudokubutton2,.sudokubutton3,.sudokubutton4,
.sudokubutton5,.sudokubutton6,.sudokubutton7 {
color: white;
-webkit-transition-duration: 0.3s;
transition-duration: 0.3s;
padding: 1px 6px;
}
.sudokubutton1 {
background-color: #3cbf71;
}
.sudokubutton2 {
background-color: #ff9224;
}
.sudokubutton3 {
background-color: #ff3c3c;
}
.sudokubutton4 {
background-color: #020202;
}
.sudokubutton5,.sudokubutton6 {
background-color: #4040ff;
}
.sudokubutton7 {
background-color: #899db6;
}
.sudokubutton1:hover,.sudokubutton2:hover,.sudokubutton3:hover,.sudokubutton4:hover,
.sudokubutton5:hover,.sudokubutton6:hover,.sudokubutton7:hover {
background-color: #EDEDED;
color: black;
cursor: pointer;
}

* {
 margin:0; padding:0;
 -moz-box-sizing: border-box;
 -webkit-box-sizing: border-box;
 box-sizing: border-box;
}

.wrap {
 padding: 2em 1em;
 width: 400px;
 max-width: 100%;
 margin-left: auto;
 margin-right: auto;
}

@media(min-width: 30em) {
 .wrap {
  width: 490px;
 }
 .sudoku-board input {
  font-size: 24px;
  font-size: 1.5rem;
 }
 .sudoku-board .candidates {
  font-size: .8em;
 }
}
</style>

<div class="wrap">
		

<label for="toggleCandidates">Show candidates </label>
<input id="toggleCandidates" class="js-candidate-toggle" type="checkbox"/>

New:
<button type="button" class="sudokubutton1 js-generate-board-btn--easy">Easy</button>
<button type="button" class="sudokubutton2 js-generate-board-btn--medium">Medium</button>
<button type="button" class="sudokubutton3 js-generate-board-btn--hard">Hard</button>
<button type="button" class="sudokubutton4 js-generate-board-btn--very-hard">Very Hard</button>

<div id="sudoku" class="sudoku-board">
</div>

Solve: <button type="button" class="sudokubutton5 js-solve-step-btn">One Step</button>
<button type="button" class="sudokubutton6 js-solve-all-btn">All</button>
<br>

Clear: <button type="button" class="sudokubutton7 js-clear-board-btn">Board</button>
</div>

$solveStepBtn.on("click", mySudokuJS.solveStep);
 $solveAllBtn.on("click", mySudokuJS.solveAll);
 $clearBoardBtn.on("click", mySudokuJS.clearBoard);

$generateBoardBtnEasy.on("click", function(){
  mySudokuJS.generateBoard("easy");
 });
 $generateBoardBtnMedium.on("click", function(){
  mySudokuJS.generateBoard("medium");
 });
 $generateBoardBtnHard.on("click", function(){
  mySudokuJS.generateBoard("hard");
 });
 $generateBoardBtnVeryHard.on("click", function(){
  mySudokuJS.generateBoard("very hard");
 });

$candidateToggle.on("change", function(){
  if($candidateToggle.is(":checked"))
   mySudokuJS.showCandidates();
  else
   mySudokuJS.hideCandidates();
 });
 $candidateToggle.trigger("change");
</script>

The IFrame version consists of a simple Sudoku game only without additional features.

IFrame Code

Why is the HTML code not working on my WordPress page?

The Sudoku game needs HTML and CSS code as well as JavaScript code to work properly. Unfortunately JavaScript is only supported in the business version of WordPress.com with installed plugins. Customers with free and premium plans cannot use JavaScript. The same applies to <iframe> tags. Some other free website builders also cause problems when executing CSS and JavaScript code.