Author: chandler yergin
Date: 04:39:01 11/08/02
Go up one level in this thread
On November 07, 2002 at 18:53:31, Steven J. Brann wrote: >On November 07, 2002 at 16:06:45, Ernst Walet wrote: > >>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. > >CM9_Brann, a custom CM9K personality on a 1.9G P4, 128MB hash finds it in 4.04. >Notice the difference in the number of positions evaluated to find the solution. > I believe this is due to the selective search setting which, on my personality >is set to 12. > > >Time Depth Score Positions Moves >0:03 4/11 0.45 616774 1.a6-a7 e5-e4 2.g4-g5 Kb4-a5 3.g5xf6 > g7xf6 4.Bf1-h3 Ka5-b6 5.Bh3xe6 > Kb6xa7 6.Kc2-c3 Ka7-b6 >0:06 5/12 0.36 1061179 1.a6-a7 e5-e4 2.g4-g5 Kb4-a5 3.g5xf6 > g7xf6 4.d3xe4 Ka5-b6 5.Bf1-c4 Kb6xa7 > 6.Bc4xe6 Bc6xe4+ 7.Kc2-c3 Ka7-b6 > 8.Kc3-c4 >0:14 6/13 0.27 2738844 1.a6-a7 e5-e4 2.d3-d4 c5xd4 3.e3xd4 > Kb4-a5 4.Bf1-c4 Ka5-b6 5.Bc4xe6 > Kb6xa7 6.d4-d5 Bc6-b5 7.Kc2-d2 > Ka7-b6 8.d5-d6 >0:23 7/14 0.08 4805134 1.a6-a7 e5-e4 2.d3xe4 Bc6xe4+ 3.Bf1-d3 > Be4-c6 4.Bd3-g6 Kb4-a5 5.Bg6-f7 > Ka5-b6 6.Bf7xe6 Kb6xa7 7.Kc2-d3 > Ka7-b6 8.Be6-c4 Bc6-f3 >0:46 8/15 0.10 9759885 1.a6-a7 e5-e4 2.d3-d4 c5xd4 3.e3xd4 > f6-f5 4.g4xf5 e6xf5 5.b2-b3 Kb4-a5 > 6.Bf1-c4 Ka5-b6 7.d4-d5 Bc6-a8 > 8.d5-d6 Kb6-c6 9.Bc4-e6 f5-f4 >1:34 9/16 0.05 20354384 1.a6-a7 e5-e4 2.d3xe4 Bc6xe4+ 3.Bf1-d3 > Be4-c6 4.Bd3-a6 Kb4-a5 5.Ba6-c8 > Ka5-b6 6.Bc8xe6 Kb6xa7 7.Kc2-d3 > Ka7-b6 8.Kd3-c4 Bc6-f3 9.b2-b3 > Kb6-c6 >2:38 10/17 0.00 35529006 1.a6-a7 e5-e4 2.d3xe4 Bc6xe4+ 3.Bf1-d3 > Be4-c6 4.Bd3-a6 Kb4-a5 5.Ba6-c8 > Ka5-b6 6.Bc8xe6 Kb6xa7 7.Kc2-d3 > Ka7-b6 8.Kd3-c4 Bc6-f3 9.b2-b4 > c5xb4 10.Kc4xb4 Kb6-c6 11.Be6-f5 >4:04 10/17 2.48 56791616 1.Bf1-g2 Bc6xg2 2.e3-e4 f6-f5 3.g4xf5 > e6xf5 4.a6-a7 f5xe4 5.d3-d4 e4-e3 > 6.d4xe5 Bg2-e4+ 7.Kc2-d1 Be4-c6 > 8.e5-e6 Kb4-b3 9.e6-e7 Kb3xb2 10.Kd1-e2 > c5-c4 11.a7-a8=Q Bc6xa8 12.e7-e8=Q >4:58 11/18 3.39 69460709 1.Bf1-g2 Bc6xg2 2.e3-e4 f6-f5 3.g4xf5 > e6xf5 4.a6-a7 f5xe4 5.d3-d4 e4-e3 > 6.d4xe5 Bg2-e4+ 7.Kc2-d1 Be4-c6 > 8.e5-e6 Kb4-b3 9.e6-e7 Kb3xb2 10.Kd1-e2 > c5-c4 11.Ke2xe3 c4-c3 12.e7-e8=Q > Bc6xe8 13.a7-a8=Q > >Steve
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