Author: George Tsavdaris
Date: 15:24:35 05/28/03
Go up one level in this thread
>This position is one that was posted many months ago, in which several programs >were able to find Rxh5, and a couple of them were able to announce mate (in 12 >moves or so). CM9000, however, found Qxf4! in less than 20 seconds on a P3-750, >and announced Mate in 10. > >[D]4r1k1/qp1r1p2/2pb1Bp1/p6p/2PP1n1R/1P3P2/P4P2/2Q2K1R w > Yes, easy for the King! CM9000-Mate (a personality i created for finding quickly mate) anounce also mate in 10, in 11 seconds on a P3-1000 GHz. Time Depth Score Positions Moves 0:03 1/7 10.69 451086 1.Qc1xf4 Re8-e1+ 2.Kf1xe1 Rd7-e7+ 3.Ke1-f1 Re7-e1+ 4.Kf1xe1 Qa7-b8 5.Qf4-h6 Qb8-e8+ 6.Ke1-f1 0:04 1/8 11.23 515563 1.Qc1xf4 Re8-e1+ 2.Kf1xe1 Qa7xd4 3.Qf4xd4 Bd6-b4+ 4.Ke1-f1 Rd7xd4 5.Rh4xd4 Kg8-h7 6.Rd4-d8 0:11 1/9 Mate10 1713177 1.Qc1xf4 Re8-e1+ 2.Kf1-g2 Re1-g1+ 3.Kg2xg1 Qa7-c5 4.Rh4xh5 g6xh5 5.Qf4-h6 Qc5-g5+ 6.Qh6xg5+ Kg8-f8 7.Qg5-g8+ Kf8xg8 8.Rh1xh5 Bd6-h2+ 9.Rh5xh2 Kg8-f8 10.Rh2-h8# 0:12 1/10 Mate10 1815300 1.Qc1xf4 Re8-e1+ 2.Kf1-g2 Re1-g1+ 3.Kg2xg1 Qa7-c5 4.Rh4xh5 g6xh5 5.Qf4-h6 Qc5-g5+ 6.Qh6xg5+ Kg8-f8 7.Qg5-g8+ Kf8xg8 8.Rh1xh5 Bd6-h2+ 9.Rh5xh2 Kg8-f8 10.Rh2-h8# 0:13 1/11 Mate10 2079153 1.Qc1xf4 Re8-e1+ 2.Kf1-g2 Re1-g1+ 3.Kg2xg1 Qa7-c5 4.Rh4xh5 g6xh5 5.Qf4-h6 Qc5-g5+ 6.Qh6xg5+ Kg8-f8 7.Qg5-g8+ Kf8xg8 8.Rh1xh5 Bd6-h2+ 9.Rh5xh2 Kg8-f8 10.Rh2-h8# > >So, just for fun, I wondered what the situation would be if it were Black to >move in this position. > >[D]4r1k1/qp1r1p2/2pb1Bp1/p6p/2PP1n1R/1P3P2/P4P2/2Q2K1R b > >And I discovered that, at least for The King, finding the relatively obvious (at >least for a patzer like me) move Re6 is much more difficult than I thought it >would be. Instead, The King plays with odd moves like Rde7(??), causing a big >fail low that takes almost three minutes to finally resolve to Re6 on a P3-750. > >Do any other programs have this "problem"? Is it a "problem" at all, or is it >actually a good test position with Black to move? > CM9000-Mate finds Re6 in 37 seconds on a P3-1000 GHz : Time Depth Score Positions Moves 0:25 1/9 6.17 3025064 1...a5-a4 2.Qc1xf4 Re8-e1+ 3.Kf1-g2 Bd6-f8 4.Rh1xe1 Qa7-a5 5.Re1-e8 Qa5-b4 6.Qf4-h6 0:28 1/9 5.03 3352486 1...Qa7-b8 2.Qc1xf4 Re8-e1+ 3.Kf1xe1 Bd6-b4+ 4.Ke1-e2 Qb8xf4 5.Rh4xf4 Rd7-d6 6.Rh1-d1 Rd6-e6+ 7.Bf6-e5 g6-g5 8.Rf4-f5 0:37 1/9 -2.07 4512388 1...Re8-e6 2.Rh4xf4 Re6xf6 3.Rf4xf6 Qa7xd4 4.Rf6xd6 Rd7xd6 5.Qc1-e1 Rd6-d8 6.Qe1xa5 b7-b6 0:49 1/10 -1.89 6175636 1...Re8-e6 2.Rh4xf4 Re6xf6 3.Rf4xf6 Qa7xd4 4.Rf6xd6 Qd4xd6 5.Kf1-g2 a5-a4 6.Qc1-h6 a4xb3 7.a2xb3 Fritz 8.00.8 and Shredder 7.04 doesn't find Re6 at 3 minutes on P3-1000GHz. Interesting that Shredder shows scores of -6.5 in favour of black with Rde7 after 3 minutes, as it don't see Qxf4!(#10).
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