Diagram of backgammon checker movement.
<a href="//commons.wikimedia.org/wiki/User:Ptkfgs" title="User:Ptkfgs">Ptkfgs</a>
Created using <a rel="nofollow" class="external text" href="http://www.gnubg.org">GNU Backgammon</a> and <a href="https://en.wikipedia.org/wiki/Dia_(software)" class="extiw" title="w:Dia (software)">Dia</a>