Author: Peter McKenzie
Date: 16:11:43 09/20/99
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On September 20, 1999 at 16:15:46, James Robertson wrote: >On September 20, 1999 at 14:51:35, Robert Hyatt wrote: > >>On September 20, 1999 at 14:08:26, Jon Dart wrote: >> >>>Arasan doesn't generate rook or bishop underpromotions except at >>>ply 0 (I think Crafty does the same thing). >> >> >>No. Crafty generates all promotions in normal search, but only generates >>queen promotions in the q-search. I think leaving out underpromotions is a >>mistake in the regular search... but in the q-search only doing queens seems >>reasonable if you don't handle checks and escaping from check. If you do, I'd >>likely throw in knight promotions... >> >> > >My program only generates Queen and Knight promotions, as I have never seen a >position where a Bishop/Rook promotion was any good.... I have run across a few Check out the Saavedra position - in my opinion one of the coolest known chess positions. The position looks deceptively simple, the sort of position you could easily imagine occuring in a real game. The solution has a couple of nice twists (including under promotion to a Rook). If you like chess and don't know this position, you are in for a real treat. Check out: http://www.xs4all.nl/~timkr/chess/saavedra.htm cheers, Peter
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