Author: Uri Blass
Date: 10:37:42 03/01/05
Go up one level in this thread
On March 01, 2005 at 09:40:38, Gabor Szots wrote: >On March 01, 2005 at 08:47:11, Thomas Lagershausen wrote: > >>[D]2r2r1k/1bqnb1pp/p2pB3/1p1Pp3/2n5/5NNP/PP3PP1/R1BQR1K1 b - - 4 20 >> >>...is the lack of positional knowledge. This counts for most of curent >>chessprograms. >> >>In the last round of Paderborn Anaconda reaches this position with the black >>pieces against Hydra and lost without any real resistance. >> >>But it is not difficult to see that black has to play against the weak pawn on >>d5 to get enough counterplay. So, the sacrifice of the exchange by 20...Nc5 or >>20...Nf6 give black the chance to free his game and equalize the position. >> >>Please notice that my intention is to help the programers and not to show how >>weak chessprograms are playing chess. >> >>Have fun and improve your chessprograms. >> >>TL > > >Hi Thomas, > >Shredder 9 has been analyzing the position now for 10 minutes, and cannot come >up with your idea (see below). >I (a 2050 Élõ player) think the case is not so simple. The exchange sacrifice >may free the position but equalize? What does black get in exchange? I am sure >that sooner or later the material disadvantage will tell. > > >2r2r1k/1bqnb1pp/p2pB3/1p1Pp3/2n5/5NNP/PP3PP1/R1BQR1K1 b - - > >Engine: Shredder 9 UCI (48 MB) >von Stefan Meyer-Kahlen > >9/24 0:01 -0.40 1...Tce8 2.b3 Scb6 3.La3 Sf6 (258.472) 173 > >9/24 0:01 -0.39++ 1...Lf6 (331.065) 170 > >9/24 0:02 -0.39 1...Lf6 2.Se4 (429.288) 168 > >10/23 0:04 -0.63 1...Lf6 2.Se4 Tce8 3.b3 Sc5 4.Sxc5 (683.780) 167 > >10/23 0:04 -0.62++ 1...Scb6 (772.321) 167 > >10/27 0:04 -0.62 1...Scb6 2.Lg5 Ld8 3.Tc1 Sc4 4.b3 (789.646) 167 > >10/27 0:04 -0.61++ 1...Tce8 (809.024) 168 > >10/27 0:05 -0.37 1...Tce8 2.b3 Scb6 3.Sg5 Lxg5 4.Lxg5 Sc5 > 5.Tc1 Db8 6.Txc5 dxc5 7.Se4 Dc7 (895.144) 168 > >10/27 0:06 -0.36++ 1...Tb8 (1.039.982) 168 > >10/27 0:06 -0.33 1...Tb8 2.b3 Sc5 3.bxc4 Sxe6 4.dxe6 Lxf3 > 5.gxf3 Dxc4 6.Db3 (1.068.264) 169 > >11/22 0:07 -0.51 1...Tb8 2.b3 Scb6 3.La3 b4 4.Tc1 Dd8 > 5.Lxb4 Lxd5 6.Lxd5 (1.331.286) 169 > >11/23 0:08 -0.50++ 1...Scb6 (1.516.564) 169 > >11/25 0:09 -0.37 1...Scb6 2.Lg5 Txf3 3.Lxe7 Txg3 > 4.fxg3 Lxd5 5.Dg4 Dc2 6.Lxd5 Dc5+ > 7.Kh2 Dxd5 (1.655.405) 171 > >11/25 0:09 -0.36++ 1...Tce8 (1.689.495) 171 > >11/25 0:10 -0.11 1...Tce8 2.b3 Scb6 3.Sg5 Lxg5 4.Lxg5 Sc5 > 5.Tc1 Db8 6.Txc5 dxc5 7.Se4 Da8 > 8.Sc3 (1.813.985) 172 > >12/26 0:12 -0.36-- 1...Tce8 2.b3 (2.235.323) 172 > >12/26 0:13 -0.45 1...Tce8 2.b3 Scb6 3.Se4 Sf6 4.Sxf6 Lxf6 > 5.La3 Sc8 6.Tc1 Db6 7.Dd2 Le7 8.Lb2 (2.408.105) 173 > >13/27 0:27 -0.21 1...Tce8 2.b3 Scb6 3.Le3 Sf6 4.Tc1 Dd8 > 5.Sg5 Lxd5 6.Sf5 h6 (4.592.841) 167 > >14/27 0:38 -0.46-- 1...Tce8 2.b3 (6.363.561) 166 > >14/27 0:41 -0.47 1...Tce8 2.b3 Scb6 3.Se4 Sc5 4.Sxc5 dxc5 > 5.Lg5 Dd6 6.Lxe7 Txe7 7.Txe5 Lxd5 > 8.Txd5 (6.980.965) 168 > >15/36 1:30 -0.36 1...Tce8 2.b3 Scb6 3.Se4 Sf6 4.Sfg5 Lxd5 > 5.Lxd5 Sbxd5 6.Sxf6 Sxf6 7.Se6 Dc3 > 8.Ld2 (14.885.124) 164 > >16/34 2:22 -0.52 1...Tce8 2.b3 Scb6 3.Se4 Sf6 4.Sfg5 Sxe4 > 5.Sxe4 Dd8 6.Le3 Lh4 7.Dd3 Lc8 > 8.Lxc8 (23.278.215) 163 > >17/35 5:11 -0.68 1...Tce8 2.b3 Scb6 3.Le3 La8 4.Se4 Sf6 > 5.Sxf6 Lxf6 6.Dd2 e4 7.Tac1 Db7 > 8.Tc6 Txe6 9.Lxb6 Tee8 10.Sg5 Le5 (50.524.299) 162 I have similiar rating to you that means that I understand almost nothing in chess relative to computers Here is anlysis of Fruit2 Fruit suggested Nf6 at depths 13-14 but after deeper search changed its mind. New game, 2r2r1k/1bqnb1pp/p2pB3/1p1Pp3/2n5/5NNP/PP3PP1/R1BQR1K1 b - - 0 1 Analysis by Fruit 2.0: 1...Nd2 2.Bxd2 +- (3.15) Depth: 1/2 00:00:00 1...Na3 2.bxa3 +- (2.52) Depth: 1/4 00:00:00 1...Na5 = (-0.23) Depth: 1/4 00:00:00 1...b4 ³ (-0.49) Depth: 1/4 00:00:00 1...a5 ³ (-0.57) Depth: 1/5 00:00:00 1...Ra8 ³ (-0.58) Depth: 1/8 00:00:00 1...Rce8 ³ (-0.62) Depth: 1/8 00:00:00 1...Rce8 2.Nf5 ³ (-0.35) Depth: 2/8 00:00:00 1...Rce8 2.b3 Ncb6 = (-0.23) Depth: 3/11 00:00:00 1...Bf6 2.Ne4 Be7 ³ (-0.32) Depth: 3/13 00:00:00 1...Bf6 2.Ne4 Rce8 3.Qd3 = (-0.21) Depth: 4/13 00:00:00 1...Bf6 2.Ne4 Rce8 3.b3 Ncb6 = (0.06) Depth: 5/16 00:00:00 1...Rce8 2.b3 Ncb6 3.Bg5 Nc5 = (-0.24) Depth: 5/16 00:00:00 1...Rce8 2.b3 Ncb6 3.Re2 Nc5 4.Ne4 Nxe6 5.dxe6 = (-0.21) Depth: 6/16 00:00:00 44kN 1...Rce8 2.b3 Ncb6 3.Be3 Nc5 4.Rc1 Bf6 5.Bxc5 dxc5 = (-0.05) Depth: 7/21 00:00:01 123kN 1...Rcd8 2.b3 Ncb6 3.Be3 Nc5 4.Rc1 Nbd7 5.Bxd7 Qxd7 6.Bxc5 dxc5 = (-0.10) Depth: 7/21 00:00:01 196kN 1...Rcd8 2.b3 Ncb6 3.Be3 Nc5 4.Rc1 Bf6 5.Ne4 = (0.06) Depth: 8/22 00:00:01 391kN 1...Ra8 2.b3 Ncb6 3.Ne4 Nc5 4.Nxc5 Qxc5 5.Be3 = (-0.13) Depth: 8/22 00:00:01 604kN 1...Rb8 2.b3 Ncb6 3.Ne4 Nc5 4.Nxc5 Qxc5 5.Be3 = (-0.20) Depth: 8/24 00:00:01 765kN 1...Rb8 2.b3 Ncb6 3.Ne4 Nf6 4.Nxf6 Bxf6 5.Re4 Qc3 = (-0.18) Depth: 9/28 00:00:02 1175kN 1...Rb8 2.b3 Ncb6 3.Ne4 Nf6 4.Nxf6 Bxf6 5.Re4 Qc3 6.Be3 = (0.03) Depth: 10/28 00:00:04 1953kN 1...Rce8 2.b3 Ncb6 3.Ng5 Bxg5 4.Bxg5 Nf6 5.Rc1 Qb8 6.Bxf6 Rxf6 = (-0.11) Depth: 10/28 00:00:04 2745kN 1...Rce8 2.b3 Ncb6 3.Ng5 Bxg5 4.Bxg5 Nf6 5.Rc1 Qb8 6.Bxf6 Rxf6 = (-0.11) Depth: 11/28 00:00:05 4724kN 1...Rce8 2.b3 Ncb6 3.Ng5 Nf6 4.Bd2 Bxd5 5.Bxd5 Nfxd5 6.Ne6 Qc6 7.Nxf8 Rxf8 = (-0.11) Depth: 12/32 00:00:11 9939kN 1...Rce8 2.b3 Ncb6 3.Ne4 Nf6 4.Nxf6 Bxf6 5.Be3 Bc8 6.Qc1 Qb7 7.Qc6 e4 = (0.20) Depth: 13/34 00:00:21 19180kN 1...Nf6 2.Ng5 Nb6 3.Nf5 g6 4.Bxc8 Rxc8 5.Ne6 Qd7 6.Nxe7 Qxe7 7.Bh6 Bxd5 8.Bg7+ Kg8 = (0.09) Depth: 13/36 00:01:28 80332kN 1...Nf6 2.Ng5 Nb6 3.Nf5 g6 4.Bxc8 Rxc8 5.Ne6 Qd7 6.Nxe7 Qxe7 7.Bh6 Bxd5 8.Bg7+ Kg8 = (0.09) Depth: 14/38 00:02:02 111872kN 1...Nf6 2.Ne4 Nb6 3.Nxf6 Bxf6 4.Be3 Nc4 5.Bxc8 Qxc8 6.Bg5 Nxb2 7.Qb3 Nc4 8.Bxf6 Rxf6 = (0.23) Depth: 15/43 00:04:42 261674kN 1...Qd8 2.Nf5 Rc5 3.Nxe7 Qxe7 4.Bg5 Nf6 5.b3 Nb6 6.Be3 Rxd5 7.Bxd5 Nfxd5 8.Rc1 Qe6 9.Bxb6 Nxb6 = (0.17) Depth: 15/50 00:07:30 412814kN 1...Ncb6 2.Ne4 Qd8 3.b3 Nf6 4.Bxc8 Qxc8 5.Bg5 Qd7 6.Nxf6 Bxf6 7.Bxf6 Rxf6 8.Qd3 Bxd5 = (0.14) Depth: 15/56 00:09:52 542358kN (, 01.03.2005)
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