<img alt="Euler Square icon" width="64" src="html5/src/img/icons/euler-64.png" /> Euler Square

Leonhard Euler's Magic Square

• <em>Start an</em> <b>Euler Square</b> <em>solitaire game and solve the puzzle on your own at</em>
  • http://omerkel.github.io/eulersquare/html5/src
  • http://omerkel.github.io/eulersquare/html5/src/index_de.html (German language)

Keywords: Leonhard Euler, Euler Square, Euler'sches Quadrat, Magic Square, Graeco-Latin square, Griechisch-Lateinisches Quadrat, Javascript, Firefox OS, Geeksphone, Mobile device, Catherine the Great, Katharina die Große, 36 officers problem, thirty-six officers problem, Albrecht Dürer, Melencolia § I

To get more detailed background information visit the info page while Euler Square puzzle is running.

<table> <tr> <td><img width="100%" ondragstart="return false;" alt="Application as installed in FirefoxOS (B2G), own work, Oliver Merkel, Creative Commons Attribution-Share Alike license" src="doc/img/eulerb2g.png" /></td> <td><img width="100%" ondragstart="return false;" alt="Euler Square application showing gameplay in MS IE10 on Win8 desktop instead of smaller resolution device, own work, Oliver Merkel, Creative Commons License, This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License." src="doc/img/euler_ie10gameplay.png" /></td> </tr><tr> <td>Application as installed in FirefoxOS (B2G), own work, Oliver Merkel,<br /><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</td> <td>Euler Square application showing gameplay in MS IE10 on Win8 desktop instead of smaller resolution device, own work, Oliver Merkel,<br /><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</td> </tr> </table>

Beware: Spoiler

If you still plan to solve the Euler Square puzzle on your own from scratch then do not look too closely onto the next screenshots.

<table> <tr> <td><img width="100%" ondragstart="return false;" alt="Screenshot of an initial version of Euler Square in Firefox OS Simulator. This 10x10 Graeco-Latin Square has a valid 3x3 Graeco-Latin Square included, own work, Oliver Merkel, Creative Commons Attribution-Share Alike license" src="doc/img/euler10b2g.png" /></td> <td><img width="100%" ondragstart="return false;" alt="Euler Square of order seven on a Geeksphone Peak mobile device, own work, Oliver Merkel, Creative Commons Attribution-Share Alike license" src="doc/img/euler_square_7_geeksphone_peak.jpg" /></td> </tr><tr> <td>Screenshot of an initial version of Euler Square in Firefox OS Simulator. This 10x10 Graeco-Latin Square has a valid 3x3 Graeco-Latin Square included, own work, Oliver Merkel,<br /><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</td> <td>Euler Square of order seven on a Geeksphone Peak mobile device, own work, Oliver Merkel,<br /><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.<td> </tr><tr> <td><img width="100%" ondragstart="return false;" alt="Another 10x10 solution with tiles of same inner and outer color on long diagonal only, own work, Oliver Merkel, Creative Commons Attribution-Share Alike license" src="doc/img/euler_another10x10.png" /></td> </tr><tr> <td>Another solution sized 10x10. This solution has tiles of same inner and outer color on long diagonal only, own work, Oliver Merkel,<br /><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</td> </tr> </table>