Author: Joachim Rang
Date: 09:00:00 02/18/03
Go up one level in this thread
On February 17, 2003 at 20:01:18, Matthew White wrote: >[D]b2r3r/k4p1p/p2q1np1/NppP4/3p1Q2/P4PPB/1PP4P/1K1RR3 w - - 0 24 > >The key move is Rxd4!(or !! depending on who you ask) after which the game >continued cxd4? Re7+!! Kb6 Qxd4+ Kxa5 b4 Ka4, etc. From Kasparov-Topalov, Wijk >aan Zee 1999. None of the programs I have tried so far can see this within 10 >minutes or so. I'm thinking that materialism, coupled with the overwhelming >desire to move the knight off of a5 prevent most programs from seeing this. > >Matt It seems the sacrifice is not winning. After the answer Kb6 the position is probably even slightly better for black. Shredder 7 prefers also Nc6+ for white, but gives nevertheless black a small advantage. Neue Partie b2r3r/k4p1p/p2q1np1/NppP4/3p1Q2/P4PPB/1PP4P/1K1RR3 w - - 0 1 Analysis by Shredder 7: 1.Df4xd6 Td8xd6 ± (0.87) Tiefe: 1/2 00:00:00 1.Df4xd6 Td8xd6 ± (0.87) Tiefe: 1/2 00:00:00 1.Df4xd6 Td8xd6 2.Te1-e7+ Ka7-b6 ± (1.09) Tiefe: 2/6 00:00:00 1.Df4xd6 Td8xd6 2.Te1-e7+ Ka7-b6 3.Td1-f1 ± (0.83) Tiefe: 3/9 00:00:00 1.Df4xd6 Td8xd6 2.Te1-e7+ Ka7-b6 3.Sa5-c6 Td6xd5 4.Te7xf7 Kb6xc6 5.Tf7xf6+ Td5-d6 ² (0.27) Tiefe: 3/13 00:00:00 1.Df4xd6 Td8xd6 2.Te1-e7+ Ka7-b6 3.Sa5-c6 La8xc6 4.d5xc6 Kb6xc6 5.Te7xf7 = (0.09) Tiefe: 3/13 00:00:00 1.Df4xd6 Td8xd6 2.Te1-e7+ Ka7-b6 3.Sa5-c6 La8xc6 4.d5xc6 Kb6xc6 5.Te7xf7 = (0.09) Tiefe: 4/12 00:00:00 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-a8 = (0.12) Tiefe: 4/12 00:00:00 1.Sa5-c6+ La8xc6 2.Te1-e7+ Dd6xe7 3.Df4-c7+ De7xc7 = (0.12) Tiefe: 4/12 00:00:00 1.Sa5-c6+ La8xc6 2.Te1-e7+ Dd6xe7 3.Df4-c7+ De7xc7 = (-0.13) Tiefe: 5/11 00:00:00 1.Sa5-c6+ La8xc6 2.Df4xd6 Lc6xd5 3.Dd6xf6 Ld5-a2+ 4.Kb1xa2 = (-0.12) Tiefe: 5/11 00:00:00 1.Sa5-c6+ La8xc6 2.Df4xd6 Lc6xd5 3.Dd6xf6 Ld5-a2+ 4.Kb1xa2 = (0.13) Tiefe: 6/11 00:00:00 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 = (0.23) Tiefe: 6/16 00:00:00 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 = (-0.02) Tiefe: 7/14 00:00:00 71kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 = (-0.02) Tiefe: 7/14 00:00:00 73kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 6.Lh3-f1 h7-h5 ³ (-0.27) Tiefe: 8/19 00:00:00 241kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 6.c2-c3 Te8-e2 7.c3xd4 c5xd4 8.Td1xd4 Te2xh2 ³ (-0.32) Tiefe: 8/19 00:00:00 280kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 6.Td1-d2 Te8-e1+ 7.Kb1-a2 h7-h5 ³ (-0.38) Tiefe: 9/22 00:00:02 623kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 6.Kb1-c1 Te8-e3 7.Td1-d3 Te3xd3 8.c2xd3 c5-c4 9.d3xc4 b5xc4 ³ (-0.34) Tiefe: 10/22 00:00:04 1460kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 6.Kb1-c1 Te8-e3 7.Td1-d3 Te3xd3 8.c2xd3 c5-c4 9.Kc1-d2 ³ (-0.33) Tiefe: 11/26 00:00:08 2628kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Ka7-b6 4.Te1-e7 Kb6xc6 5.Te7xf7 Th8-e8 6.Kb1-c1 Te8-e2 7.Td1-d2 Te2-e3 8.Lh3-c8 Kc6-d5 ³ (-0.46) Tiefe: 12/29 00:00:17 5557kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Ka7-b6 4.Te1-e7 Kb6xc6 5.Te7xf7 Th8-e8 6.Kb1-c1 Kc6-d5 7.f3-f4 Te8-e2 8.Td1-d2 Te2-e1+ 9.Td2-d1 Te1xd1+ 10.Kc1xd1 h7-h6 ³ (-0.44) Tiefe: 13/30 00:00:39 12735kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Ka7-b6 4.Te1-e7 Kb6xc6 5.Te7xf7 Th8-e8 6.Kb1-c1 h7-h6 7.f3-f4 Sf6-d5 8.Tf7-a7 ³ (-0.45) Tiefe: 14/32 00:01:13 23872kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Ka7-b6 4.Te1-e7 Kb6xc6 5.Te7-a7 Kc6-b6 6.Ta7xf7 Th8-e8 7.Kb1-c1 c5-c4 8.Lh3-f1 Sf6-g4 9.f3xg4 ³ (-0.40) Tiefe: 15/35 00:02:28 48181kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Ka7-b6 4.Te1-e7 Kb6xc6 5.Te7-a7 Kc6-b6 6.Ta7xf7 Th8-e8 7.Lh3-f1 Td6-e6 ³ (-0.39) Tiefe: 16/37 00:05:04 95245kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Ka7-b6 4.Te1-e7 Kb6xc6 5.Te7xf7 Th8-e8 6.Kb1-c1 Kc6-d5 7.f3-f4 Te8-e2 8.Td1-d2 Te2-e3 9.Lh3-g2+ ³ (-0.35) Tiefe: 17/40 00:12:16 226296kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 6.Lh3-f1 h7-h6 7.Lf1-d3 g6-g5 8.h2-h4 Te8-e3 9.h4xg5 h6xg5 10.Tf7-g7 Te3xf3 ³ (-0.41) Tiefe: 18/42 00:27:42 511565kN 1.Sa5-c6+ La8xc6 2.Df4xd6 Td8xd6 3.d5xc6 Td6xc6 4.Te1-e7+ Ka7-b6 5.Te7xf7 Th8-e8 6.Kb1-c1 Tc6-d6 7.Lh3-f1 Te8-e3 8.f3-f4 h7-h6 9.Lf1-h3 Te3-e8 10.Tf7-g7 Sf6-d5 11.Tg7-h7 ³ (-0.46) Tiefe: 19/44 01:01:15 1154943kN (tralala, 18.02.2003) After forcing Rxd4 Shredder wants to play Kb6 and the eval is about 0.5 in favor for black. Possible lines: 1. Nc6+ (1. Rxd4 Kb6 2. b4 Qxf4 3. Rxf4 Nxd5 4. Rxf7 cxb4 5. axb4 Nxb4 6. Nb3 =+) 1... Bxc6 2. Qxd6 Rxd6 3. dxc6 Rxc6 4. Re7+ Kb6 5. Rxf7 Re8 =
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