Author: F. Jermann
Date: 01:20:20 01/04/04
Go up one level in this thread
On January 03, 2004 at 22:02:14, m.d.hurd wrote: >On January 03, 2004 at 20:54:27, William Rex wrote: > >>,i - Ruffian 2.0.0 >>8/PR3p2/1K2pk2/8/6p1/1B2n3/8/r7 w - - 0 1 >> >>Analysis by Shredder 7.04: >> >>2.a8Q Rxa8 >> -+ (-4.91) Depth: 1/2 00:00:00 >>2.a8Q Rxa8 >> -+ (-4.91) Depth: 1/2 00:00:00 >>2.a8R Rxa8 >> -+ (-4.31) Depth: 1/2 00:00:00 >>2.a8R Rxa8 >> -+ (-3.92) Depth: 1/2 00:00:00 >>2.a8R Rxa8 >> -+ (-3.20) Depth: 1/2 00:00:00 >>2.Rb8 >> -+ (-1.67) Depth: 1/4 00:00:00 >>2.Rb8 >> -+ (-1.67) Depth: 1/4 00:00:00 >>2.Rb8 Ke7 >> µ (-1.38) Depth: 2/7 00:00:00 >>2.Rb8 Ng2 >> = (-0.16) Depth: 2/7 00:00:00 >>2.Rb8 Ng2 3.a8Q Rxa8 4.Rxa8 >> +- (1.62) Depth: 2/7 00:00:00 >>2.Rb8 Rxa7 3.Kxa7 >> = (0.08) Depth: 3/4 00:00:00 >>2.Rb8 Rxa7 3.Kxa7 >> = (0.00) Depth: 3/7 00:00:00 >>2.Rb8 Rxa7 3.Kxa7 g3 >> = (-0.21) Depth: 4/15 00:00:00 >>2.Rb8 Nd5+ 3.Bxd5 Rxa7 4.Kxa7 exd5 >> = (-0.21) Depth: 5/12 00:00:00 >>2.Rb8 Ke5 3.Kc7 Rxa7+ 4.Rb7 Rxb7+ 5.Kc6 Rxb3 >> ³ (-0.46) Depth: 6/14 00:00:00 >>2.Rb8 Ke5 3.a8Q Nd5+ 4.Bxd5 Ra6+ 5.Kxa6 >> ³ (-0.46) Depth: 6/14 00:00:00 >>2.Rb8 Ke5 3.a8Q Nd5+ 4.Bxd5 Rb1+ 5.Ka6 Rb6+ 6.Kxb6 >> = (-0.21) Depth: 7/15 00:00:00 29kN >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Rg8 >> = (-0.04) Depth: 7/17 00:00:00 37kN >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra5+ Kf6 6.Ra1 >> = (0.04) Depth: 8/17 00:00:00 63kN, tb=10 >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra2 g3 6.Ra1 >> = (-0.21) Depth: 9/17 00:00:00 84kN, tb=13 >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra1 f4 6.Kc5 >> ³ (-0.52) Depth: 9/19 00:00:00 121kN, tb=20 >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Rg8 f4 6.Kc5 f3 >> ³ (-0.37) Depth: 10/19 00:00:01 226kN, tb=54 >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra1 Kd4 >> = (-0.12) Depth: 11/19 00:00:02 362kN, tb=106 >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Ra1 f4 6.Kc5 Ke4 7.Bxe6 >> = (-0.04) Depth: 11/21 00:00:02 455kN, tb=171 >>2.Rb8 Ke5 3.a8Q Rxa8 4.Rxa8 f5 5.Kc5 f4 6.Re8 g3 7.Rg8 Kf5 >> = (-0.16) Depth: 12/21 00:00:04 675kN, tb=348 >>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Rg7 Ng4 7.Bc2+ Kf4 8.Rxf7+ Ke3 9.Rf1 >>gxf1Q >> ³ (-0.41) Depth: 13/26 00:00:07 1255kN, tb=608 >>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bc2+ Kf4 7.Bd1 Nxd1 8.Rxg2 >> ³ (-0.64) Depth: 13/28 00:00:08 1669kN, tb=702 >>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Nxd1 7.Rxg2 f6 8.Kc5 >> ³ (-0.67) Depth: 14/30 00:00:22 4205kN, tb=1932 >>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Nxd1 7.Rxg2 f6 8.Kc5 >> µ (-0.75) Depth: 15/31 00:00:37 7028kN, tb=3632 >>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Kf4 7.Kc5 f5 8.Kc6 Nxd1 >> µ (-1.00) Depth: 16/34 00:01:07 12475kN, tb=7175 >>2.Rb8 g3 3.a8Q Rxa8 4.Rxa8 g2 5.Rg8 Kf5 6.Bd1 Kf4 7.Kb5 f5 8.Rxg2 Nxg2 9.Kb6 >> µ (-1.09) Depth: 16/35 00:01:19 15616kN, tb=8757 >> >>(, none 03.01.2004) >> >> >>On January 03, 2004 at 16:44:39, F. Jermann wrote: >> >>>The following position occured in a game played yesterday by me against an ELO >>>2300 player. After almost 5 hours of fight, the move Kb6 was the last bad >>>move... >>> >>>Interestingly many engines have 'problems' to see the winning move g4! whereas >>>others find it almost immediately. Maybe a good test for 'pushed pawn' code?! >>> >>>[d] 8/PR3p2/1K2pk2/6p1/8/1B2n3/8/r7 b - - 2 53 bm g4;black wins! >>> >>>Best, >>>Frank > >Hello Frank what hardware are you using ? My old PII/333 Mhz Notebook... to be honest. What I wanted to show: There seem to be two different types of engines. The first one needs a less than 10 ply search to find g4, the second type typically needs about 14 or more plies! For example, Shredder 7.04 would need several minutes on my slow hardware. Ruffian 1.0.5 found the solution in several seconds. I think this must have something to do with 'pushed pawn extensions'?! > >S7.04 on my amd 2400xp finds it fairly quick. > >New game >8/PR3p2/1K2pk2/6p1/8/1B2n3/8/r7 b - - 0 1 > >Analysis by Shredder 7.04: > >53...g4 54.Rb8 g3 55.a8Q Rxa8 56.Rxa8 g2 57.Rg8 Kf5 58.Bc2+ Kf4 59.Bd1 Nxd1 >60.Rxg2 >³ (-0.67) Depth: 14/31 00:00:22 6675kN, tb=6193 >(Hurd, n/a 04.01.2004) > >Regards > >Mike
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