Author: Slater Wold
Date: 20:45:19 10/06/01
Bruce and I have disagreed in the past that DJ7 can "solve" Nolot #3. He believes that DJ7 simply "prefers" Nxg5, because it doesn't have an impressive eval. Well, I believe I have found the reason! Here is the position: [D]r2qk2r/ppp1b1pp/2n1p3/3pP1n1/3P2b1/2PB1NN1/PP4PP/R1BQK2R w KQkq - 0 1 Here are Baudot's words: Smaguine - Sahovic, Bienne 1990 White wins with a queen sac but black has several ways to defend 12.Nxg5!! Bxd1 13.Nxe6 Qb8 14.Nxg7!! Kf8 15.Bh6! Bg4 16.0-0+ 17.Kg8 17.Rf4 +- It should take between a few months and a few years for a program to find 12.Nxg5!! Here was DJ7's original solution: Deep Junior 7 - W,S r2qk2r/ppp1b1pp/2n1p3/3pP1n1/3P2b1/2PB1NN1/PP4PP/R1BQK2R w KQkq - 0 1 Analysis by Deep Junior 7: 1.a4 Nxf3+ 2.gxf3 = (0.11) Depth: 3 00:00:01 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 Bh3 3.Rf2 0-0 ² (0.37) Depth: 6 00:00:01 5kN 1.Bxg5 Bxg5 2.Qc2 Be3 3.Bxh7 ² (0.50) Depth: 6 00:00:01 16kN 1.Bxg5! ± (0.80) Depth: 9 00:00:01 45kN 1.Bxg5! Bxg5 2.Qc2 Bxf3 3.gxf3 Be3 4.Bxh7 Qg5 ± (0.82) Depth: 9 00:00:01 92kN 1.Bxg5 Bxg5 2.h3 Bh4 3.hxg4 Bxg3+ 4.Ke2 Kf7 5.Bxh7 Rf8 6.Qf1 ± (0.82) Depth: 12 00:00:01 1248kN 1.Bxg5 Bxg5 2.h3 Bh4 3.hxg4 Bxg3+ 4.Ke2 h6 5.Rh3 Bf4 6.Qf1 0-0 7.Bg6 a5 ± (0.82) Depth: 15 00:00:08 12743kN 1.Bxg5 Bxg5 ² (0.52) Depth: 18 00:01:48 188951kN 1.Nxg5 Bxd1 2.Nxe6 Qb8 3.Nxg7+ Kd8 4.Kxd1 b5 5.Bf5 b4 6.Ne6+ Kc8 7.Bd2 Qb6 8.Kc2 ² (0.68) Depth: 18 00:03:52 363925kN 1.Nxg5 Bxd1 2.Nxe6 Qb8 3.Nxg7+ Kd8 4.Kxd1 b5 5.Bf5 b4 6.Kc2 a5 7.Ne6+ Kd7 8.Bh6 a4 9.cxb4 ± (0.72) Depth: 20 00:07:17 757031kN (W, 24.09.2001) Look at the mainline though. Baudot's line is a *tad* different. Instead of Kf8, DJ7 believe (and therefore evaluates) Kd8. I played through, with DJ7, and here's what I got: Intial move: Deep Junior 7 - W,S r2qk2r/ppp1b1pp/2n1p3/3pP1n1/3P2b1/2PB1NN1/PP4PP/R1BQK2R w KQkq - 0 1 Analysis by Deep Junior 7: 1.a4 Nxf3+ 2.gxf3 = (0.11) Depth: 3 00:00:01 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 ± (0.85) Depth: 3 00:00:01 1kN 1.0-0 Nxf3+ 2.gxf3 Bh3 3.Rf2 0-0 ² (0.37) Depth: 6 00:00:01 5kN 1.Bxg5 Bxg5 2.Qc2 Be3 3.Bxh7 ² (0.50) Depth: 6 00:00:01 16kN 1.Bxg5! ± (0.80) Depth: 9 00:00:01 45kN 1.Bxg5! Bxg5 2.Qc2 Bxf3 3.gxf3 Be3 4.Bxh7 Qg5 ± (0.82) Depth: 9 00:00:01 92kN 1.Bxg5 Bxg5 2.h3 Bh4 3.hxg4 Bxg3+ 4.Ke2 Kf7 5.Bxh7 Rf8 6.Qf1 ± (0.82) Depth: 12 00:00:01 1243kN 1.Bxg5 Bxg5 2.h3 Bh4 3.hxg4 Bxg3+ 4.Ke2 h6 5.Rh3 Bf4 6.Qf1 0-0 7.Bg6 a5 ± (0.82) Depth: 15 00:00:08 13013kN 1.Bxg5 Bxg5 ² (0.52) Depth: 17 00:00:51 90216kN 1.Nxg5 Bxd1 2.Nxe6 Qb8 3.Nxg7+ Kd8 4.Kxd1 b5 5.Bf5 b4 6.Ne6+ Kd7 7.Kc2 Qb6 ² (0.62) Depth: 17 00:01:44 152203kN 1.Nxg5 Bxd1 2.Nxe6 Qb8 3.Nxg7+ Kd8 4.Kxd1 b5 5.Bf5 b4 6.Ne6+ Kc8 7.Bd2 Qb6 8.Kc2 ² (0.68) Depth: 18 00:02:26 254638kN (W, 06.10.2001) **It follows Baudot to Kf8. When I played Kf8, this is my eval:* Deep Junior 7 - W,S rq3k1r/ppp1b1Np/2n5/3pP3/3P4/2PB2N1/PP4PP/R1BbK2R w KQ - 0 1 Analysis by Deep Junior 7: 4.e6 Nxd4 -+ (-2.14) Depth: 3 00:00:01 4.N7h5 Bxh5 5.Bh6+ Kg8 6.Nxh5 ³ (-0.59) Depth: 3 00:00:01 4.Bh6 Bg4 ² (0.54) Depth: 3 00:00:01 1kN 4.Bh6 Bg4 ² (0.54) Depth: 3 00:00:01 1kN 4.Bh6! Ba4 ± (0.84) Depth: 6 00:00:01 5kN 4.Bh6! Bg4 5.0-0+ Kg8 6.Rf4 Qc8 7.Raf1 ± (0.86) Depth: 6 00:00:01 8kN 4.Bh6 Bg4 5.0-0+ Kg8 6.Ne4 Qc8 7.Nf6+ Bxf6 8.exf6 ± (0.82) Depth: 9 00:00:01 63kN 4.Bh6 Bg4 5.h3 Bc8 ² (0.64) Depth: 12 00:00:01 990kN 4.Bh6 Bg4 5.0-0+ Kg8 6.Rf4 Bc8 7.Raf1 b5 8.Rf7 Qb6 9.e6 ± (0.86) Depth: 15 00:00:07 11132kN 4.Bh6! ± (1.16) Depth: 17 00:00:35 64171kN 4.Bh6! ± (1.16) Depth: 17 00:02:08 219079kN (W, 06.10.2001) 4...Bg4: Deep Junior 7 - W,S rq3k1r/ppp1b1Np/2n4B/3pP3/3P4/2PB2N1/PP4PP/R2bK2R b KQ - 0 1 Analysis by Deep Junior 7: 5.e6 Kg8 = (-0.23) Depth: 3 00:00:01 5.0-0+ Kg8 ± (1.16) Depth: 6 00:00:01 5.0-0+ Kg8 ± (1.16) Depth: 6 00:00:01 5.0-0+ Kg8 ± (1.16) Depth: 6 00:00:01 5.0-0+ Kg8 ± (1.16) Depth: 6 00:00:01 5.0-0+ Kg8 ± (1.16) Depth: 9 00:00:01 8kN 5.0-0+ Kg8 ± (1.16) Depth: 12 00:00:01 75kN 5.0-0+ Kg8 ± (1.16) Depth: 14 00:00:01 1208kN 5.0-0+! +- (1.46) Depth: 16 00:00:10 15140kN 5.0-0+! +- (1.76) Depth: 17 00:01:10 121398kN 5.0-0+! Kg8 6.Rf4 Nxe5 7.dxe5 Bc8 8.N7f5 Bc5+ 9.Nd4 a5 10.Ne4 Be7 11.Nf6+ Bxf6 12.exf6 Kf7 13.Raf1 +- (1.96) Depth: 17 00:01:39 174621kN (W, 06.10.2001) 5...Kg8: Deep Junior 7 - W,S rq3k1r/ppp1b1Np/2n4B/3pP3/3P2b1/2PB2N1/PP4PP/R4RK1 b - - 0 1 Analysis by Deep Junior 7: 6.e6 Qc8 = (0.14) Depth: 3 00:00:01 6.Rf4 Nxe5 +- (1.96) Depth: 6 00:00:01 6.Rf4 Nxe5 +- (1.96) Depth: 6 00:00:01 6.Rf4 Nxe5 +- (1.96) Depth: 9 00:00:01 13kN 6.Rf4 Nxe5 +- (1.96) Depth: 12 00:00:01 252kN 6.Rf4 Nxe5 +- (1.96) Depth: 15 00:00:03 2531kN 6.Rf4 Nxe5 7.dxe5 Bc8 8.N7f5 Bc5+ 9.Nd4 b5 10.Nh5 Be7 11.Nf6+ Bxf6 12.Raf1 Bd7 13.exf6 Kf7 +- (2.08) Depth: 17 00:00:53 87848kN (W, 06.10.2001) Here is a recap: Deep Junior 7 - W,S Level=180"av. , 06.10.2001 1.Nxg5 0.68/18 3:48 Bxd1 2.Nxe6 0.72/20 3:26 Qb8 3.Nxg7+ 0.54/19 2:44 Kf8 4.Bh6 1.16/17 2:09 Bg4 5.0-0+ 1.96/17 2:13 Kg8 6.Rf4 2.08/17 1:00 1-0 It choose, step by step, each move. With _no_ problem. But what about Kf8? Is it the best move? Here is what I get: W,S - Deep Junior 7 rq2k2r/ppp1b1Np/2n5/3pP3/3P4/2PB2N1/PP4PP/R1BbK2R b KQkq - 0 1 Analysis by Deep Junior 7: 3...Kf7 4.Bh6 ³ (-0.55) Depth: 3 00:00:01 3...Kf7 4.Bh6 Bg4 5.0-0+ Kg8 6.e6 ² (0.66) Depth: 6 00:00:01 11kN 3...Kf7 4.Bh6 ± (0.96) Depth: 9 00:00:01 169kN 3...Kd7 4.Bf5+ Kd8 5.Kxd1 Bh4 6.Ne6+ Ke7 7.Bf4 Bxg3 8.Bxg3 ± (0.95) Depth: 9 00:00:01 220kN 3...Kd8! ² (0.36) Depth: 9 00:00:01 401kN 3...Kd8 4.Kxd1 b5 5.Bf5 b4 ± (0.71) Depth: 12 00:00:02 1415kN 3...Kd8 4.Kxd1 b5 5.Bf5 b4 6.Kc2 Qb5 7.Ne6+ Kd7 8.b3 Qa6 9.cxb4 ² (0.70) Depth: 15 00:00:08 14218kN 3...Kd8 4.Kxd1 b5 5.Bf5 b4 6.Kc2 Rg8 7.Ne6+ Kc8 ² (0.57) Depth: 18 00:03:19 325791kN 3...Kd8 4.Kxd1 b5 5.Bf5 b4 6.Kc2 Rg8 7.Ne6+ Kc8 ² (0.57) Depth: 18 00:03:40 363183kN (W, 06.10.2001) Slate
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