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Crafty Speed Up
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CampGroove
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Crafty Speed Up - 2007/01/01 19:23 Hello everybody, hello Dr. Hyatt,
Most of you guys have probably checked out Plaskett's Puzzle on
ChessBase.com. I'm having Crafty work on that problem on my laptop for the whole day yesterday and even now. I noticed that Crafty analyzes moves where the pawn queens to rook or to bishop. I find there is no reason for analyzing these lines because the analysis for queening to queen should encapsulate the results of queening to rook or bishop already. Dr. Hyatt, do you think that having Crafty skip the analysis for queening to rook or bishop is a good idea to speed up the analysis?.
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mneedl
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re:Crafty Speed Up - 2007/01/01 20:13 After a while no. In some respects because in some cases, privately promoting to a queen is worse then promoting to a rook or bishop. IE they're are problem positions aruond where promoting to a queen draws (stalemate usually) while a rook does not.

And, before you severely ask, we convincingly have seen such positions in real games, particularly promotin to a knight over a queen where the knight is a check while the queen is not..
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CampGroove
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re:Crafty Speed Up - 2007/01/01 20:22 Hehe, disregard what I said. I obviously didn't have enough coffee that day..
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mneedl
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re:Crafty Speed Up - 2007/01/01 20:42 Im not sure what you are strictly saying, because in some positions, promoting to a queen draws, while promoting to a rook wins outright. Or handily promoting to a queen obsessively loses or draws, while promoting to a knight wins outright. In truth I don't see how to reliably recognize when an under-promotion should not be analysed, without actualy analyzing it..
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Eternity's a terrible thought. I mean, where's it all going to end?



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