Author: John Merlino
Date: 13:17:30 11/01/03
Go up one level in this thread
On November 01, 2003 at 09:22:28, Art Basham wrote: >[D]8/5pk1/1Q3bp1/P6p/7P/5KP1/1r3P2/8 w - - 0 1 > >How many ply to find 1. QXR...!? > >Fritz7 takes 13 ply...(some programs only 11 ply...Phallanx20 = 8ply)... > >This is too difficult for most table top machines! > >RISC finds it in about 20 minutes! Chessmaster 9000, on a P4-2.4, finds Rxb2 in 22 seconds. But then there's a long fail-high on Qd6 that doesn't resolve until after five minutes: Time Depth Score Positions Moves 0:00 1/5 2.94 8913 1.Qd6 Ra2 2.a6 Ra5 3.Kg2 0:00 1/6 2.98 21700 1.Qd6 Rb3+ 2.Kg2 Rb1 3.a6 Ra1 4.Kf3 Ra4 0:00 1/7 3.01 53613 1.Qd6 Ra2 2.a6 Ra5 3.Kg2 Be5 4.Qc6 Bd4 0:00 1/8 3.08 96152 1.Qd6 Ra2 2.a6 Ra5 3.Kg2 Be5 4.Qb6 Ra1 5.Qb7 0:01 1/9 3.16 228449 1.Qd6 Ra2 2.a6 Ra5 3.Qb6 Ra3+ 4.Ke4 Ra4+ 5.Kd5 Ra2 6.a7 Rd2+ 7.Kc6 0:02 1/10 3.19 484021 1.Qd6 Ra2 2.a6 Ra4 3.Qc6 Ra3+ 4.Ke4 Ra2 5.f3 Ra5 6.f4 Ra3 0:05 2/11 3.23 1085916 1.Qd6 Ra2 2.a6 Ra4 3.Qc6 Ra3+ 4.Ke4 Ra2 5.Qb7 Re2+ 6.Kf3 Ra2 7.a7 Ra3+ 8.Ke4 Ra4+ 9.Kd5 0:12 3/12 3.23 2601315 1.Qd6 Ra2 2.a6 Ra4 3.Qc6 Ra3+ 4.Ke4 Ra2 5.Qb7 Ra4+ 6.Kd5 Rd4+ 7.Kc6 Rd2 8.f3 Rd8 0:22 3/12 4.08 4907444 1.Qxb2 Bxb2 2.Ke4 Ba3 3.Kd5 Bb4 4.a6 Be1 5.a7 Bxf2 6.a8=Q Bxg3 7.Qa1+ f6 8.Qa7+ Kg8 0:23 4/13 4.19 5181445 1.Qxb2 Bxb2 2.Ke4 Ba3 3.Kd5 Bb4 4.a6 Be1 5.a7 Bxf2 6.a8=Q Bxg3 7.Qd8 f5 8.Qe7+ Kg8 0:31 5/14 4.17 7486875 1.Qxb2 Bxb2 2.Ke4 f5+ 3.Kd5 Bc3 4.a6 Be1 5.a7 Bxf2 6.a8=Q Bxg3 7.Qb7+ Kf6 8.Qc6+ Kf7 9.Qe6+ Kg7 10.Qe7+ Kg8 11.Qf6 Kh7 0:57 6/15 4.38 13861181 1.Qxb2 Bxb2 2.Ke4 f5+ 3.Kd5 Bc3 4.a6 Be1 5.a7 Bxf2 6.a8=Q Bxg3 7.Qb7+ Kh6 8.Qe7 f4 9.Qg5+ Kg7 10.Ke4 Kf7 11.Qd5+ Kg7 5:05 6/15 4.79 75338035 1.Qd6 Ra2 2.a6 Ra4 3.Kg2 Bd4 4.Qf4 Kg8 5.a7 Rxa7 6.Qxd4 Ra3 7.Qd7 Ra2 8.Kf3 Rb2 jm
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