Author: Djordje Vidanovic
Date: 14:29:08 10/18/05
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This is a terrible bug. You can see that even at depth 15 Fritz 9 thinks that it's slightly behind, instead of assessing the position as totally won. I tried some other analogous positions and Fritz 9 seems at a loss too. This bug will be extremely upsetting for correspondence players... At approximately the same depth, Fruit 2.2, the sceptical program, is very much aware that it's winning as black: New game, 1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b - - 0 1 Analysis by Fritz 9: 1...Ne5 2.Bc3 b5 3.Ra7 Kg8 4.Rc7 Re8 ³ (-0.34) Depth: 7/19 00:00:00 73kN 1...Ne5 2.Bc3 b5 3.Ra8 Kh7 4.Ra5 Nd3 5.Ke3 ³ (-0.37) Depth: 8/19 00:00:00 170kN 1...Ne5 2.Bc5 b5 3.Be7 Re8 4.Bf6+ Kh7 5.Kd2 Nbd7 6.Rh1+ Kg6 ³ (-0.38) Depth: 9/22 00:00:00 492kN 1...Ne5 2.Bc5 b5 3.Bb4 Na6 4.Be7 Re8 5.Bf6+ Kh7 6.Kd2 c5 ³ (-0.39) Depth: 10/38 00:00:00 1419kN, tb=1 1...Ne5 2.Bc3 b5 3.Ra7 Nbd7 4.Kd1 Nc5+ 5.Kc2 Ne4 6.Ba1 Rd2+ 7.Kb3 c5 ³ (-0.39) Depth: 11/46 00:00:02 4102kN, tb=2 1...Ne5 2.Bc3 b5 3.Ra7 Nbd7 4.Ba1 c5 5.Rb7 b4 6.Bb2 Kh7 7.Rc7 ³ (-0.40) Depth: 12/27 00:00:05 8244kN, tb=27 1...Ne5 2.Bxe5+ Kh7 3.Ra7 Nd7 4.Rxb7 Kg6 5.Bd4 Kg5 6.Rc7 Nb8 7.Ke3 Kf5 8.Rf7+ Ke6 ³ (-0.37) Depth: 13/38 00:00:09 15608kN, tb=84 1...Kh7! ³ (-0.37) Depth: 13/38 00:00:11 19995kN, tb=84 1...Kh7 2.Rh1+ Kg6 3.Rg1+ Kf5 4.Bc3 b5 5.Rf1+ Ke4 6.Re1 c5 7.Kd2+ Kd5 8.Rd1 Kc4 9.Kc2 ³ (-0.42) Depth: 13/43 00:00:26 44646kN, tb=119 1...Kh7 2.Rh1+ Kg6 3.Rg1+ Kf5 4.Bc3 b5 5.Rf1+ Ke4 6.Re1 c5 7.Kd2+ Kd5 8.Bb2 b4 9.Rd1 c4 10.Kc2+ ³ (-0.43) Depth: 14/51 00:00:50 84955kN, tb=139 1...Kh7 2.Bc3 b5 3.Rh1+ Kg6 4.Rb1 Nf6 5.Ba5 Nd5 6.Rg1+ Kf5 7.Kd2 c5 8.Rf1+ Kg4 9.Kc1 Nc6 ³ (-0.45) Depth: 15/49 00:02:29 251301kN, tb=271 1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b - - 0 1 Analysis by Fruit 2.2: 1...Kh7 -+ (-3.81) Depth: 1/7 00:00:00 1...Kh7 2.Rh1+ Kg6 -+ (-3.99) Depth: 2/7 00:00:00 1...Kh7 2.Rh1+ Kg6 3.Rg1+ Kf5 4.Rf1+ Ke4 -+ (-4.05) Depth: 3/7 00:00:00 1...Kh7 2.Rh1+ Kg6 3.Rg1+ Kf5 4.Rf1+ Ke4 -+ (-4.05) Depth: 4/10 00:00:00 1...Kg8 2.Rg1+ Kf7 3.Rg7+ Ke6 4.Rh7 -+ (-4.06) Depth: 4/10 00:00:00 1...Kg8 2.Rg1+ Kf7 3.Rg7+ Ke6 4.Rh7 b5 -+ (-4.32) Depth: 5/13 00:00:00 1...Kg8 2.Rb1 Re8+ 3.Kd3 b5 4.Rg1+ Kh7 5.Rg7+ Kh6 -+ (-4.35) Depth: 6/15 00:00:00 34kN 1...Kg8 2.Ra7 c5 3.Be3 b6 4.Bf4 Nc6 -+ (-4.44) Depth: 7/17 00:00:00 97kN 1...Kh7 2.Rh1+ Kg6 3.Rg1+ Kf5 4.Rf1+ Ke4 5.Be3 Na6 6.Rf7 -+ (-4.56) Depth: 7/17 00:00:00 179kN 1...Kh7 2.Rh1+ Kg6 3.Rg1+ Kf5 4.Rf1+ Ke4 5.Be3 Na6 6.Rf4+ Kd5 7.Rf7 -+ (-4.59) Depth: 8/19 00:00:01 291kN 1...Kh7 2.Ra7 Re8+ 3.Kd2 c5 4.Be3 b6 5.Ke2 b5 6.Ra1 -+ (-4.75) Depth: 9/21 00:00:01 763kN 1...Kh7 2.Ra7 Re8+ 3.Kd2 c5 4.Be3 b6 5.Bf4 Kg6 6.Rb7 Rd8 -+ (-4.74) Depth: 10/23 00:00:01 1186kN 1...Kh7 2.Be3 Na6 3.Rd1 Kg6 4.Rd4 Kf7 5.Rf4+ Ke6 6.Rg4 b5 7.Bd4 -+ (-4.96) Depth: 11/26 00:00:04 5291kN 1...Kh7 2.Be3 Na6 3.Rd1 Kg6 4.Rd4 Kf7 5.Rf4+ Ke6 6.Rh4 Nf6 7.Bb6 Rd5 -+ (-5.03) Depth: 12/28 00:00:07 8749kN 1...Kh7 2.Be3 Na6 3.Rd1 Nc7 4.Rd6 Nd5 5.Bd4 Re8+ 6.Kf2 N7b6 7.Kf3 Rf8+ 8.Ke4 Rf4+ 9.Kd3 Rf3+ 10.Ke4 -+ (-5.11) Depth: 13/28 00:00:18 21290kN 1...Kh7 2.Ra7 c5 3.Be3 b6 4.Ra1 Ne5 5.Rh1+ Kg7 6.Rg1+ Kf7 7.Rf1+ Ke6 8.Bg5 Rd6 9.Rf6+ Kd5 10.Rf1 -+ (-5.22) Depth: 14/32 00:00:46 54937kN (Vidanovic, Home 18.10.2005)
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