Author: K. Burcham
Date: 20:13:30 02/09/02
This turned out to be a very difficult test position. Deep Shredder6 in over 22 hours on 3100 mhz will not play Nxf2. Chess Tiger 14.0 1000mhz in over 21 hours will not play Nxf2. Fritz7 1507 mhz in over 20 hours will not play Nxf2. if i make the first move Nxf2, then Deep Shredder6 will make the next move in this line Nxf2 Kxf2 Bh4 g3 f4. and will play each move in this line. so Deep Shredder6 agrees with this line. So with this line, it seems the depth is about 10 until Shredder6 sees the line is winning for black. Nxf2 Kxf2 Bh4 g3 f4 4.Kg2 fxg3 5.hxg3 Bxg3 6.Rh1 Bh4 7.Nf1 Qf6 8.Bxh7+ Kh8 9.Bd3 Rae8 10.Kg1 Be2 11.Bf5 (224.630.445) 575.2 13.01 6:30 -0.85 (did i count right here) but with 20 hours at depth 19 Deep Shredder6 will not play Nxf2. [D] r2q1rk1/ppp1b1pp/2n5/3p1p2/3Pn1b1/2PB4/PPQN1PPP/RNB1R1K1 b - - 0 1 black won by Nxf2 Kxf2 Bh4+ g3 f4 I will try to give a more detailed analysis of this position but I remember that black can win it against every defence of white It is difficult even after f4 for programs to see that white is losing and Junior5 after some hours in the position after f4 evaluates the position as 0.19 pawns advantage for white. Uri Shredder 6: 2x1533mhz 512 hash 16.01 34:23 +0.31 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.h3 Bh5 5.Be3 f4 6.Bc1 Bxa3 7.bxa3 Bg6 8.Nh2 (965.481.550) 467.9 17.01 111:09 +0.54 1...Bd6 2.Nf1 Qh4 3.Na3 a6 4.Re3 f4 5.Bxe4 fxe3 6.Bxd5+ Kh8 7.Bxe3 Rad8 8.Bxc6 bxc6 (3.178.285.525) 476.5 18.01 421:46 +0.76 1...Bd6 2.Nf1 Qh4 3.b3 Rf6 4.Ng3 Kh8 5.a3 Rff8 6.a4 Rae8 7.Bxe4 fxe4 8.Ba3 Be7 (12.249.550.309) 484.0 19.01 1226:56 +0.89 1...Bd6 2.Nf1 Qh4 3.a4 Kh8 4.b3 Rf6 5.Ng3 g5 6.Re3 Rh6 7.h3 Bf4 8.Re1 Bxh3 (36.663.667.488) 498.0 best move: Be7-d6 time: 1372:22.985 min n/s: 511.653 CPU 199.9% nodes: 42.131.054.127 depth 19 Chess Tiger 14.0 1000mhz 192 hash 02:01:10.8 -0.12 18 1727643107 Bd6 Nf1 Qh4 Na3 a6 Re3 Nf6 Re6 f4 Rxd6 cxd6 Bxf4 Rad8 Re1 Bf5 Bxf5 Qxf4 Be6+ Kh8 09:41:35.9 0.16 19 40158732 Bd6 Nf1 Qh4 Na3 a6 Re3 Nf6 Bxf5 Bxf5 Qxf5 Ng4 Qxd5+ Kh8 g3 Nxe3 Nxe3 Qf6 f4 Qg6 21:31:56.1 0.16 20 -2024641247 Bd6 Nf1 Qh4 Na3 a6 Re3 Nf6 Bxf5 Bxf5 Qxf5 Ng4 Qxd5+ Kh8 g3 Fritz7: 1507 mhz 256 hash 1...Bd6 2.Nf1 Qh4 3.Re3 Nf6 4.f3 f4 5.Re2 Bh5 6.b3 Rae8 7.Ba3 (-.38) Depth: 18/48 05:47:07 14824155kN 1...Bd6 2.Nf1 (-.41) Depth: 19/52 14:00:51 36310193kN (over 20 hours did not update analysis) After: Nxf2 Kxf2 Bh4 g3 f4 [D] r2q1rk1/ppp3pp/2n5/3p4/3P1pbb/2PB2P1/PPQN1K1P/RNB1R3 w - - 0 1 Fritz 7: 1507 mhz 192 hash 4.Kg2 fxg3 5.Bxh7+ Kh8 6.hxg3 Be7 +- (2.63) Depth: 8/28 00:00:00 319kN 4.Kg2 f3+ +- (2.44) Depth: 9/32 00:00:01 1303kN 4.Bxh7+ Kh8 5.Kg2 Qd7 6.gxh4 +- (2.44) Depth: 9/32 00:00:02 1622kN 4.Bxh7+-- +- (2.16) Depth: 10/30 00:00:03 2529kN 4.Bxh7+ Kh8 5.Kg2 fxg3 6.hxg3 Qd6 7.Nf1 Rxf1 +- (2.13) Depth: 10/33 00:00:04 3022kN 4.Kg2! +- (2.16) Depth: 10/33 00:00:05 3446kN 4.Kg2 fxg3 5.hxg3 Qd6 6.gxh4 Rf2+ 7.Kxf2 Qh2+ 8.Ke3 Qh3+ 9.Nf3 Qxf3+ 10.Kd2 +- (2.19) Depth: 10/33 00:00:05 3928kN 4.Kg2 fxg3 5.Bxh7+ Kh8 6.hxg3 Qd6 7.Nf1 +- (2.13) Depth: 11/33 00:00:14 10201kN 4.Kg2-- +- (1.85) Depth: 12/36 00:00:23 15913kN 4.Kg2 fxg3 5.Bxh7+ Kh8 6.hxg3 Bh3+ 7.Kxh3 Bxg3 8.Nf3 Rxf3 9.Kg2 Bxe1 10.Kxf3 +- (1.82) Depth: 12/39 00:00:33 23370kN 4.Kg2-- +- (1.54) Depth: 13/40 00:01:09 49143kN 4.Kg2 fxg3 5.Rf1 gxh2 6.Bxh7+ Kh8 7.Kh1 Qd6 ± (1.00) Depth: 13/44 00:01:54 81088kN 4.Kg2! ± (1.29) Depth: 14/44 00:05:14 225140kN 4.Kg2 fxg3 5.hxg3 Bxg3 6.Bxh7+ Kh8 7.Rh1 Bh4 8.Qg6 Rf2+ 9.Kg1 Qe7 10.Ne4 Bf5 ± (1.32) Depth: 14/44 00:06:40 287765kN 4.Kg2-- ± (1.04) Depth: 15/43 00:10:58 474202kN 4.Kg2 fxg3 5.hxg3 Bxg3 6.Rh1 Qf6 7.Bxh7+ Kh8 8.Bg8+ Kxg8 µ (-0.90) Depth: 15/50 00:40:12 1732610kN 4.Kg1! µ (-0.87) Depth: 15/50 00:46:20 2000417kN 4.Kg1 fxg3 5.Nf1 gxh2+ 6.Qxh2 Bf2+ 7.Kg2 h5 8.Re2 Qf6 µ (-0.84) Depth: 15/50 00:48:36 2101317kN Shredder6: 2x1533 mhz 512 hash 12.01 1:15 +1.42 4.Kg2 fxg3 5.hxg3 Bxg3 6.Bxh7+ Kh8 7.Rh1 Bh4 8.Qg6 Rf4 9.Rf1 Bf5 10.Qxf5 Rxf5 11.Bxf5 (43.479.086) 578.9 13.01 2:03 +1.17-- 4.Kg2 fxg3 5.hxg3 Bxg3 6.Bxh7+ Kh8 7.Rh1 Bh4 8.Qg6 Rf4 9.Rf1 Qf8 10.Rxf4 Qxf4 11.Kh1 Bf3+ 12.Nxf3 Qxc1+ 13.Ng1 Qxb2 14.Qg5 (70.624.732) 572.2 13.01 2:24 +0.67-- 4.Kg2 fxg3 5.hxg3 Bxg3 6.Bxh7+ Kh8 7.Rh1 Bh4 8.Qg6 Rf4 9.Rf1 Qf8 10.Rxf4 Qxf4 11.Kh1 Bf3+ 12.Nxf3 Qxc1+ 13.Kg2 Qxb2+ 14.Qc2 Qxa1 15.Nxh4 (82.450.456) 569.9 13.01 6:30 -0.85 4.Kg2 fxg3 5.hxg3 Bxg3 6.Rh1 Bh4 7.Nf1 Qf6 8.Bxh7+ Kh8 9.Bd3 Rae8 10.Kg1 Be2 11.Bf5 (224.630.445) 575.2 14.01 21:15 -0.93 4.Kg2 fxg3 5.hxg3 Bxg3 6.Rh1 Bh4 7.Nf1 Qf6 8.Be3 Bf3+ 9.Kg1 Bxh1 10.Kxh1 Qf3+ 11.Qg2 Rae8 12.Nbd2 Qxg2+ 13.Kxg2 Ne7 (752.907.205) 590.1 15.01 43:15 -1.18-- 4.Kg2 fxg3 5.hxg3 Bxg3 6.Rh1 Bh4 7.Nf1 Qf6 8.Be3 Rae8 9.Kg1 Rxe3 10.Bxh7+ Kh8 11.Be4 Rxe4 12.Nbd2 (1.542.308.200) 594.1 15.01 51:49 -1.68-- 4.Kg2 fxg3 5.hxg3 Bxg3 6.Rh1 Bh4 7.Nf1 Qf6 8.Be3 Rae8 9.Kg1 Rxe3 10.Bxh7+ Kh8 11.Nxe3 Bf2+ 12.Kf1 Qf3 13.Be4+ Bh3+ 14.Ng2 (1.844.461.791) 593.2 15.01 68:02 -1.72 4.Kg2 fxg3 5.hxg3 Bxg3 6.Rh1 Bh4 7.Nf1 Qf6 8.Be3 Rae8 9.Kg1 Rxe3 10.Bxh7+ Kh8 (2.464.855.967) 603.8 kburcham
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