Hexagonal board for <a href="https://en.wikipedia.org/wiki/three-handed_chess" class="extiw" title="w:three-handed chess">three-handed chess</a>.
<a rel="nofollow" class="external text" href="http://www.przyslop.zawoja.pl/szachy_dla_trzech/index.html">Dr Jacek Filek</a>
2010-07-30; chessboard manufactured in 2008
<span class="int-own-work" lang="en">Own work</span>