Author: Uri Blass
Date: 12:32:34 12/03/02
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On December 03, 2002 at 13:44:21, Colin Frayn wrote: >Here's an interedting position that arose in an ICC game between Beowulf and a >human player. it's one of those positions where Beowulf knows it's behind, but >can't possibly realise how bad his position is because he doesn't realise how >his h7 rook is utterly trapped. > >[D]r4k2/2R2p1r/4pBp1/4P2p/pR3P1P/Pb2K1P1/8/8 b - - > >I'm not sure how to get round this without adding in some hideously slow code. >I already have mobility code in for the rook but then it's difficult to >distinguish between a rook that's in a nice defensive position that it could get >out of and which will transform itself into an open file fairly quickly after a >pawn exchange, and something like this where there is no sequence of moves to >retrieve the rook from its corner. What is beowulf's score? Here is some analysis by movei depth=14 -1.01 f8e8 e3f2 e8f8 b4d4 a8e8 d4d8 e8d8 f6d8 f8e8 d8f6 b3d5 f2e3 h7h6 c7a7 d5c6 Nodes: 17724223 NPS: 165988 Time: 00:01:46.78 depth=15 -1.19 f8e8 e3f2 e8f8 b4d4 a8e8 c7d7 b3d5 d7d6 e8b8 d4a4 f8e8 a4d4 b8c8 d4d1 h7h6 Nodes: 42223126 NPS: 170151 Time: 00:04:08.15 depth=16 -1.30 f8e8 e3f2 e8f8 b4d4 a8e8 d4d8 e8d8 f6d8 b3d5 d8f6 f8e8 c7e7 e8f8 e7d7 d5c6 d7d8 c6e8 f2f3 h7h6 Nodes: 86221969 NPS: 171938 Time: 00:08:21.47 Uri
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