Author: Ernst Walet
Date: 13:06:45 11/07/02
Looking into some collected positions I found this nice one. The key is to sacrifice the bishop (Bg2) and play e4, to trap the black bishop. How do programs do here? To start, CM9K took 09:12 on a Celeron1200, 256MB hash. [D]8/6p1/P1b1pp2/2p1p3/1k4P1/3PP3/1PK5/5B2 w - - 0 1 Time Depth Score Positions Moves 0:00 1/5 0.80 4319 1.a7 Kb5 2.g5 fxg5 3.Bh3 Kb6 0:00 2/6 1.20 21083 1.a7 e4 2.Kd2 exd3 3.Bxd3 Ba8 0:00 3/7 1.01 37839 1.a7 e4 2.Kd2 exd3 3.Bxd3 Ba8 4.Ke2 0:00 4/8 1.06 56042 1.a7 e4 2.Kd2 exd3 3.Bxd3 Ba8 4.Ke2 Ka5 0:01 5/9 0.72 146943 1.a7 e4 2.dxe4 Bxe4+ 3.Kd2 Ba8 4.Bh3 Kb5 5.g5 Kb6 6.gxf6 gxf6 0:02 6/10 0.28 317414 1.a7 e4 2.g5 Ka5 3.gxf6 gxf6 4.Bh3 Kb6 5.Bxe6 Kxa7 6.Kc3 exd3 7.Kxd3 0:04 7/11 0.28 615508 1.a7 e4 2.g5 Ka5 3.gxf6 gxf6 4.Bh3 Kb6 5.Bxe6 Kxa7 6.Kc3 exd3 7.Kxd3 0:08 8/12 0.13 1310139 1.a7 e4 2.g5 Ka5 3.gxf6 gxf6 4.dxe4 Kb6 5.Bc4 Kxa7 6.Bxe6 Bxe4+ 7.Kc3 Kb6 8.Kc4 0:26 9/13 0.10 4502224 1.a7 e4 2.d4 cxd4 3.exd4 Ka5 4.Bc4 Kb6 5.Bxe6 Kxa7 6.Kd2 Kb6 7.d5 Bb5 8.d6 0:47 10/14 -0.09 8163668 1.a7 e4 2.dxe4 Bxe4+ 3.Bd3 Bc6 4.Bg6 Ka5 5.Kd3 Kb6 6.Bf7 Kxa7 7.Bxe6 Kb6 8.b3 Kb5 1:37 11/15 -0.03 17072076 1.a7 e4 2.d4 cxd4 3.exd4 f5 4.gxf5 exf5 5.b3 Ka5 6.Bc4 Kb6 7.d5 Ba8 8.d6 Kc6 9.Be6 f4 3:09 12/16 -0.12 33992541 1.a7 e4 2.dxe4 Bxe4+ 3.Bd3 Ba8 4.Bg6 Ka5 5.Kd3 Kb6 6.Bf7 Kxa7 7.Bxe6 Kb6 8.Kc4 Bf3 9.b3 Kc6 5:54 13/17 -0.18 65781987 1.a7 e4 2.dxe4 Bxe4+ 3.Kd2 Ka5 4.Bc4 Kb6 5.Bxe6 Kxa7 6.Bf5 Bd5 7.e4 Bc4 8.Kc3 Bf7 9.Bd7 Kb6 10.b4 Bg6 9:12 13/17 1.76 105197652 1.Bg2 Bxg2 2.e4 c4 3.a7 cxd3+ 4.Kxd3 f5 5.a8=Q Bxe4+ 6.Qxe4+ fxe4+ 7.Kxe4 Kb3 8.Kxe5 Kxb2 9.Kxe6 Kc3 10.Kf7 g5 11.Kg6 Kd4 12.Kxg5 11:39 14/18 2.60 133337498 1.Bg2 Bxg2 2.e4 f5 3.gxf5 exf5 4.a7 fxe4 5.d4 e3 6.dxe5 Be4+ 7.Kd1 Bc6 8.e6 Kb3 9.e7 Kxb2 10.Ke2 c4 11.Kxe3 c3 12.e8=Q Bxe8 13.a8=Q Ernst.
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