George Duke wrote on Thu, Feb 18, 2010 05:37 PM UTC:
Flowerman's at http://www.chessvariants.org/index/displaycomment.php?commentid=25071 is where we get the theory that Chess mutates every 500 years out of control. Roughly, 500 - 1000 Chaturanga, 1000 - 1500 Shatranj, 1500 - 2000 Strong mad Queen Shatranj. 500 year Comet Caissa is long period:
http://www.chessvariants.org/fiction.dir/poems/falconpoem4.html.
Then the Next Chesses from the top down this time, because CVers are far the more informed. Bodlaender may find here promotion differences too between Chaturanga and Shatranj, to the same Flowerman inquiry. The five hundred years,
http://www.chessvariants.org/index/displaycomment.php?commentid=22850, accord with Phoenix.