Author: José de Jesús García Ruvalcaba
Date: 12:17:33 09/21/99
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On September 20, 1999 at 20:01:19, James Robertson wrote: >On September 20, 1999 at 19:11:43, Peter McKenzie wrote: > >>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 > >I'll reiterate my answer to Jeremiah: I'm aware of such positions, but have yet >to see one in an actual game (and I've seen a _lot_ of games). > >James The Saavedra position arose in an actual game, only that both players misplayed it quite badly. It was published with faulty analysis by one of the players. It is credited to Saavedra as he was the first one to publish the correct solution. José.
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