Author: Eelco de Groot
Date: 22:49:20 05/05/05
Go up one level in this thread
On May 05, 2005 at 23:52:03, Steven Edwards wrote: >Here's WCSAC.0016: > >[D] r4rk1/pp1b2p1/2p4n/2Qp1p1R/3P4/3BP3/PP2NPq1/1K5R w - - 0 1 > >The book gives the answer 1. Rxh6, but a lengthy analysis says that the capture >is better if it's deferred a couple of moves: > >pes +2.257; >pv Qd6 Rf7 Nf4 Qxf2 Rxh6 gxh6 Qxh6 Rg7 Qh8+ Kf7 Qxa8 Rg1+ Rxg1 Qxg1+ Kc2 Qxe3 >Qxb7 Ke8; > >Is there a bug in the problem or in the analysis? Very cursory analysis by Pro Deo 1.1: 00:00:00.6 1,00 1 444 Qe7 00:00:00.6 0,83 2 833 Qe7 Rf7 00:00:00.7 0,66 3 1852 Qe7 Rf7 Qh4 00:00:00.7 0,83 3 2465 R5h2 Qg5 Nf4 00:00:00.7 0,83 3 3012 Rg1 00:00:00.7 1,76 3 3399 Rg1 Qxf2 Rxh6 Qxg1+ 00:00:00.8 1,76 4 5329 Rg1 Qxf2 Rxh6 Qxg1+ Nxg1 00:00:00.8 1,76 4 10473 Rxh6 00:00:00.8 2,37 4 12195 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rfe8 00:00:00.9 2,62 5 23538 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rf7 Nf3 00:00:01.1 2,61 6 55747 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rf7 Nf3 Rg7 Ne5 Rg1+ 00:00:01.8 2,61 7 119571 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rf7 Nf3 Rg7 Ne5 Rg1+ 00:00:03.6 2,76 8 330555 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rf7 Nf3 Rg7 Ne5 Be6 Bf1 00:00:05.5 2,76 8 617916 Qd6 00:00:05.9 3,35 8 688020 Qd6 Rad8 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Kh7 Qe7+ Kh8 00:00:09.6 3,60 9 1199102 Qd6 Rf6 Qxd7 Rf7 Qe6 Qxf2 Rg1 Kf8 00:00:17.2 3,94 10 2491887 Qd6 Rad8 Rg1 Qxf2 Rxh6 Qxg1+ Nxg1 gxh6 Qg6+ Kh8 Qxh6+ Kg8 Nf3 00:00:30.8 3,49 11 4774616 Qd6 Rf7 Nf4 Qxf2 Rxh6 gxh6 Qxh6 Rg7 Qh8+ Kf7 Qxa8 Qxe3 Qb8 Qxd4 00:01:04.0 3,57 12 10671384 Qd6 Rf7 Nf4 Qxf2 Rxh6 gxh6 Qxh6 Rg7 Qh8+ Kf7 Qxa8 Rg1+ Rxg1 Qxg1+ Kc2 00:02:21.7 3,80 13 24030809 Qd6 Rf7 Nf4 Qf3 Ka1 00:06:42.5 3,72 14 70716692 Qd6 Rf7 Nf4 Qf3 Rxh6 gxh6 Rg1+ Rg7 Rxg7+ Pro Deo 1.1 Betazoid T90b: 00:00:00.7 1,27 1 441 Qe7 00:00:00.7 1,13 2 832 Qe7 Rf7 00:00:00.8 0,91 3 1813 Qe7 Rf7 Qh4 00:00:00.8 1,07 3 2150 R5h2 Qg5 Nf4 00:00:00.8 1,07 3 3121 Rg1 00:00:00.8 1,73 3 3446 Rg1 Qxf2 Rxh6 Qxg1+ 00:00:00.9 1,73 3 3928 Rxh6 00:00:00.9 2,44 3 4260 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 00:00:00.9 2,28 4 6840 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rfe8 00:00:01.0 2,58 5 25144 Rxh6 gxh6 Rg1 Qg5 Rxg5+ hxg5 00:00:01.2 2,22 6 57225 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rf7 Ne2 Rg7 00:00:02.2 2,58 7 156693 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rf7 Nf3 Rg7 Qd6 h5 00:00:04.1 2,58 8 386515 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Rf7 Nf3 Rg7 Qd6 h5 00:00:05.3 2,58 8 581763 Qd6 00:00:06.9 3,38 8 660878 Qd6 Rad8 Rxh6 gxh6 Rg1 Qxg1+ Nxg1 Kh7 Qe7+ Kh8 00:00:14.0 3,64 9 1825917 Qd6 Rf7 Nf4 Qxf2 Rxh6 gxh6 Qxh6 Rg7 Qh8+ Kf7 Qxa8 00:00:20.2 3,64 10 2846262 Qd6 Rf7 Nf4 Qxf2 Rxh6 gxh6 Qxh6 Rg7 Qh8+ Kf7 Qxa8 00:00:43.8 3,69 11 6890583 Qd6 Rf7 Nf4 Rf6 Qxd7 Qxf2 Bxf5 Qxe3 Qxb7 Raf8 Ng2 00:01:42.7 3,95 12 17201439 Qd6 Rf7 Nf4 Qf3 R5h3 Qxf2 Rxh6 gxh6 Qxh6 Rg7 Qh8+ 00:04:02.0 3,96 13 42134140 Qd6 Rf7 Nf4 Qf3 R5h3 Qxf2 Rxh6 (Numbercruncher Celeron 500 MHz) Regards, Eelco
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