Author: Uri Blass
Date: 14:36:08 11/16/02
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On November 16, 2002 at 17:08:24, andrew tanner wrote: > Best move: Rxe7! and a mate in x follows. >Taken from one of Capablanca's instructional games. Finding the move is only few seconds [D]2n2rk1/1pqrbppp/p2p4/2pQ4/6P1/1P1B1N1P/P3RP2/3R2K1 w - - 0 Movei fails to see the mate in X to follow and can see only winning the bishop Can you post the mate line for white after the logical moves Rxe7 g6 Some analysis by movei(PIII850) it needs only few seconds to find it 9 -36 373 511001 d3h7 g8h7 e2e7 h7g8 e7d7 c7d7 f3g5 d7e7 g5e4 e7h4 e4g5 9 -35 505 687093 e2e7 9 132 609 829676 e2e7 c8e7 d3h7 g8h8 d5h5 e7g8 h7f5 g8h6 g4g5 d7e7 g5h6 g7g6 9 132 653 894091 e2e7 c8e7 d3h7 g8h8 d5h5 e7g8 h7f5 g8h6 g4g5 d7e7 g5h6 g7g6 10 121 697 965871 e2e7 c8e7 d3h7 g8h8 d5h5 e7g8 h7f5 g8h6 g4g5 d7e7 g5h6 g7g6 h5g5 Later depth=10 +1.21 e2e7 c8e7 d3h7 g8h8 d5h5 e7g8 h7f5 g8h6 g4g5 d7e7 g5h6 g7g6 h5g5 Nodes: 1377228 NPS: 143311 Time: 00:00:09.61 depth=11 +2.55 e2e7 g7g6 e7d7 c7d7 d3e4 b7b6 d5b7 d7b7 e4b7 a6a5 b7c8 f8c8 d1d6 Nodes: 9048476 NPS: 129411 Time: 00:01:09.92 depth=12 +2.55 e2e7 g7g6 e7d7 c7d7 d3e4 b7b6 d5b7 d7b7 e4b7 a6a5 b7c8 f8c8 d1d6 Nodes: 12303650 NPS: 129785 Time: 00:01:34.80 depth=12 +2.55 e2e7 g7g6 e7d7 c7d7 d3e4 b7b6 d5b7 d7b7 e4b7 a6a5 b7c8 f8c8 d1d6 Nodes: 13821222 NPS: 130180 Time: 00:01:46.17 depth=13 +2.71 e2e7 g7g6 e7d7 c7d7 d3e4 b7b6 d5b7 d7e7 b7e7 c8e7 d1d6 f7f5 g4f5 g6f5 Nodes: 26993900 NPS: 130955 Time: 00:03:26.13 depth=13 +2.71 e2e7 g7g6 e7d7 c7d7 d3e4 b7b6 d5b7 d7e7 b7e7 c8e7 d1d6 f7f5 g4f5 g6f5 Nodes: 32047508 NPS: 133126 Time: 00:04:00.73 depth=14 +2.66 e2e7 g7g6 e7d7 c7d7 d3e4 b7b6 d5b7 d7e7 b7e7 c8e7 d1d6 f7f5 g4f5 g6f5 e4b7 Nodes: 41930702 NPS: 132839 Time: 00:05:15.65 After Rxe7 Nxe7? movei still cannot see the mate depth=11 +5.79 d3h7 g8h8 d5h5 g7g5 h7f5 h8g7 h5h7 g7f6 h7h6 e7g6 f5g6 f8e8 g6f5 f6e7 d1e1 e7d8 h6f6 d7e7 f3g5 e8f8 g5f7 d8e8 e1e7 c7e7 f7d6 e8d8 d6b7 Nodes: 6749595 NPS: 150024 Time: 00:00:44.99 depth=12 +7.69 d3h7 g8h8 d5h5 g7g5 h7e4 h8g7 h5h7 g7f6 h7h6 e7g6 e4g6 f8e8 g6h7 f6e7 h6g5 f7f6 d1e1 e7d8 e1e8 d8e8 g5g8 e8e7 g8g7 e7e6 h7f5 e6d5 f5d7 Nodes: 29448242 NPS: 146326 Time: 00:03:21.25 depth=12 +7.69 d3h7 g8h8 d5h5 g7g5 h7e4 h8g7 h5h7 g7f6 h7h6 e7g6 e4g6 f8e8 g6h7 f6e7 h6g5 f7f6 d1e1 e7d8 e1e8 d8e8 g5g8 e8e7 g8g7 e7e6 h7f5 e6d5 f5d7 Nodes: 30294725 NPS: 146492 Time: 00:03:26.80 Only after Rxe7 Rxe7?? movei can see the mate depth=7 +99.89 d3h7 g8h8 d5h5 g7g6 h7g6 h8g7 h5h7 g7f6 g4g5 f6e6 g6f5 Nodes: 116023 NPS: 139786 Time: 00:00:00.83 or after Rxe7 Nxe7? Bxh7+ Kxh7? depth=6 +99.87 d5h5 h7g8 f3g5 f8d8 h5h7 g8f8 h7h8 e7g8 g5h7 f8e8 h8g8 e8e7 d1e1 Nodes: 20761 NPS: 129756 Time: 00:00:00.16 Uri
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