Author: Andrew Platt
Date: 14:19:04 09/25/04
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On September 25, 2004 at 16:35:05, Stuart Cracraft wrote: >So do you solve WAC 141 in a reasonable amount of time? As I said, I don't see the mate score in a reasonable time but I do find Qxf4!: 6 -178 6 45906 Kf1 b4 Bc4 Nd5 Bg5 f5 6 -178 6 47494 Kf1 b4 Bc4 Nd5 Bg5 f5 7 -172 26 191354 Kf1 a5 Bg5 Nd3 Qc2 Re1+ Kg2 Re8 7 -172 28 201701 Kf1 a5 Bg5 Nd3 Qc2 Re1+ Kg2 Re8 8 -163 89 666343 Kf1 a5 Bg5 Ne6 Bxe6 Rxe6 Kg1 f5 8 -163 92 692725 Kf1 a5 Bg5 Ne6 Bxe6 Rxe6 Kg1 f5 9 -124 823 6360825 Kf1 Rc8 Qb1 Nd5 Kg1 b4 Bg5 Be7 f4 9 +137 1218 9592419 Qxf4 ++ 9 +764 1459 11570166 Qxf4 Bxf4 Rxh5 gxh5 Rxh5 Bh6 Rxh6 Qg3+ fxg3 Re2+ Kh3 Rh2+ Kxh2 a5 9 +764 1462 11596859 Qxf4 Bxf4 Rxh5 gxh5 Rxh5 Bh6 Rxh6 Qg3+ fxg3 Re2+ Kh3 Rh2+ Kxh2 a5 10 +764 1834 14726581 Qxf4 Bxf4 Rxh5 gxh5 10 +764 1870 15025646 Qxf4 Bxf4 Rxh5 gxh5 As you can see it misses the mate near the bottom. It extends at Rxh5 (mate threat), Rxh5 again, Rxh6 (mate threat still), Qg3+ (check). I forget exactly why it misses the mate at the bottom. I know it drops into qsearch with Rh8# being move it doesn't consider because it's a capture; I think the line it comes up with happens because it has the most extensions and captures! I don't consider this conclusive; I expect I could change the search for something else and find this one disappears again! Andy.
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