Author: Ernst Walet
Date: 11:06:28 12/29/02
Go up one level in this thread
On December 29, 2002 at 10:34:56, Thomas Lagershausen wrote: >[D]r2qr1k1/1p3p1p/p1b1pbpB/4N3/Pn1P4/6R1/1P2QPPP/1B1R2K1 b - - am Bxa4 > >In a game Spasski-Pachman (Manila 1976) Pachman found the good defence Nb4-d5-e7 >to bring a further defender to his king to protect the weak g6 square. > >Wrong is of course ...Bxa4 ?? after b3 nebst Qh5 and Lxg6 white´s attack is >decisive.Maybe an immediate is also decisive. > >Here are an example that this tasc of defence is not trivial. > >Two strong programs on paralell analysis on Athlon 1,5 Ghz under Arena-GUI: > >s: Yace 0.99.68 UCI 100 MB: >T1 00:00 -0,97 Lxe5 dxe5 >T1 00:00 0,46 Lxa4 >T2 00:00 0,45 Lxa4 b3 >T3 00:00 0,58 Lxa4 b3 Lc6 Sxc6 Sxc6 >T4 00:00 0,47 Lxa4 b3 Lc6 Tc3 >T5 00:00 0,68 Lxa4 b3 Lb5 Dg4 Dd5 >T6 00:00 0,60 Lxa4 b3 Lc6 Dg4 Dd5 Tc1 >T7 00:01 0,62 Lxa4 b3 Lc6 Dg4 Dd6 Sxc6 Sxc6 >T8 00:04 0,60 Lxa4 b3 Lc6 Dh5 De7 Tc1 Tac8 Dg4 >T9 00:15 0,62 Lxa4 b3 Lc6 Dg4 Dd6 Sxc6 Sxc6 Le4 Tad8 d5 >T10 02:16 0,48 Lxa4 b3 Lc6 Dh5 Te7 Sxf7 Txf7 Lxg6 hxg6 Dxg6 Lg7 Lxg7 Dd5 >T11 04:54 0,51 Lxa4 b3 Lc6 Dh5 Dc7 Sxg6 fxg6 Lxg6 Te7 Lxh7 Kh8 Lg6 Tc8 >T12- 05:39 0,11 Lxa4 b3 Lc6 Dh5 Dc7 Lxg6 fxg6 Sxg6 Lg7 Lxg7 Dxg3 hxg3 hxg6 >T12 01:09:23 -0,14 Lxa4 b3 Lc6 Dh5 Te7 Sxf7 Txf7 Lxg6 Tc7 Lxh7 Kh8 Tg8 Dxg8 >Lxg8 Txg8 Lg5 Kg7 >T13- 01:11:03 -0,54 Lxa4 b3 Lc6 Dh5 Te7 Sxf7 Txf7 Lxg6 Tc7 Lxh7 Kh8 Tg8 Dxg8 >Lxg8 Tac8 Lg5 Kg7 >T13 01:18:54 -0,88 Lxa4 b3 Lc6 Dh5 Dc7 Lxg6 fxg6 Sxg6 hxg6 Txg6 Lg7 Txg7 >Dxg7 Lxg7 Kxg7 De5 Kh6 Te1 >T13+ 01:28:30 -0,87 Dd5 Dh5 Te7 Sg4 Lxd4 Sf6 Lxf6 Txd5 exd5 Txg6 hxg6 Lxg6 >T13 02:00:00 -0,16 Dd5 Dh5 Te7 b3 Tc7 Sg4 Le7 De5 Dxe5 dxe5 Tac8 Sf6 Lxf6 >exf6 Sd5 > >Aristarch 4.4 UCI 86 MB: >T2 00:00 0,21 Lxa4 b3 >T3 00:00 0,36 Lxa4 b3 Lb5 >T4 00:00 0,25 Lxa4 b3 Lb5 Dg4 >T5 00:00 0,53 Lxa4 b3 Lb5 Dg4 Tc8 >T6 00:00 0,31 Lxa4 b3 Lc6 Dg4 Tc8 Tc1 >T7 00:00 0,37 Lxa4 b3 Lb5 Dg4 Lh4 Th3 g5 >T8 00:01 0,30 Lxa4 b3 Lc6 Dg4 Ld5 h3 Tc8 Te1 >T9 00:04 0,47 Lxa4 b3 Lb5 Dg4 Sc6 Lc2 Tc8 Le4 Sxd4 >T10 00:08 0,45 Lxa4 b3 Lb5 Dh5 De7 Dg4 Sc6 Df4 Tad8 Lc2 >T11 00:31 0,47 Lxa4 b3 Lb5 Dh5 Dc7 Le4 Tad8 Lf4 Lg7 Dg4 Tc8 >T12 02:50 0,50 Lxa4 b3 Lc6 >T13 10:46 0,37 Lxa4 b3 >T14 26:40 0,07 Lxa4 b3 Lb5 Dh5 >T15 01:29:04 -0,13 Lxa4 b3 Lc6 > >So no result by Aristarch and a subperfect solution by Yace. > >What is the opinion of your favorite program? > >TL It had to come from far, but Shredder7 eventually plays this defence line... New game r2qr1k1/1p3p1p/p1b1pbpB/4N3/Pn1P4/6R1/1P2QPPP/1B1R2K1 b - - 0 1 Analysis by Shredder 7: 1...Bxe5 2.dxe5 Bxa4 ± (1.19) Depth: 1/3 00:00:01 1...Bxe5 2.dxe5 Bxa4 ± (0.90) Depth: 1/3 00:00:01 1...Bxa4 µ (-0.83) Depth: 1/3 00:00:01 1...Bxa4 µ (-0.83) Depth: 1/3 00:00:01 1...Bxa4 2.Rd2 ³ (-0.44) Depth: 2/11 00:00:01 1...Bxa4 2.b3 = (-0.23) Depth: 2/11 00:00:01 1...Bxa4 2.b3 Bc6 3.Nxc6 Nxc6 ³ (-0.30) Depth: 3/8 00:00:01 1...Bxa4 2.b3 Bc6 3.Be4 = (-0.14) Depth: 4/10 00:00:01 1...Bxa4 2.b3 Bc6 3.Be4 Rc8 = (-0.23) Depth: 5/10 00:00:01 1...Bxa4 2.b3 Bc6 3.Qg4 Rc8 4.Qf4 ³ (-0.44) Depth: 6/16 00:00:01 1...Bxa4 2.b3 Bb5 3.Qf3 Rc8 4.Re1 Nc2 ³ (-0.38) Depth: 7/15 00:00:02 50kN 1...Bxa4 2.b3 Bb5 3.Qf3 Rc8 4.Re1 Nd5 5.Be4 ³ (-0.42) Depth: 8/17 00:00:02 135kN 1...Bxa4 2.b3 Bb5 3.Qf3 Rc8 4.Re1 Nd5 5.Qh5 ³ (-0.45) Depth: 9/21 00:00:02 216kN 1...Bxa4 2.b3 Bb5 3.Qf3 Rc8 4.Be4 Nd5 5.Bxd5 exd5 6.Re1 ³ (-0.58) Depth: 10/21 00:00:04 428kN 1...Bxa4 2.b3 Bb5 3.Qf3 Rc8 4.Re1 Nd5 5.Bxg6 hxg6 6.Qf4 Nxf4 µ (-0.71) Depth: 11/25 00:00:07 1092kN 1...Bxa4 2.b3 Bb5 3.Qe4 Qe7 4.Rf3 Nd5 5.Ng4 Bh4 6.Ne5 f5 7.Qe1 ³ (-0.54) Depth: 12/27 00:00:18 3587kN 1...Bxa4 2.b3 Bb5 3.Qh5 Qd5 4.Bxg6 hxg6 5.Rxg6+ Kh7 6.Rxf6 Qc4 7.bxc4 ³ (-0.29) Depth: 13/31 00:00:37 7604kN 1...Bxa4 2.b3 Bc6 3.Qh5 Qc7 4.Nxg6 fxg6 5.Bxg6 Kh8 6.Bf4 Qd7 7.Bxe8 Rxe8 = (-0.10) Depth: 13/33 00:00:51 10944kN 1...Bxa4 2.b3 Bc6 3.Qh5 Qc7 4.Nxg6 fxg6 5.Bxg6 Kh8 6.Bxe8 Bxe8 7.Qg4 Qf7 8.Re1 Nc6 9.Re4 = (0.13) Depth: 14/34 00:02:46 35845kN 1...Bxa4 2.b3 Bc6 3.Qh5 Qc7 4.Nxg6 fxg6 5.Bxg6 Kh8 6.Bf4 e5 7.dxe5 Bxe5 8.Bxh7 Bf3 9.Bxe5+ ² (0.29) Depth: 15/38 00:08:03 102993kN 1...Bh4 2.Nxc6 Nxc6 3.Re3 Nxd4 4.Qg4 Bf6 5.Red3 e5 6.Ba2 ² (0.28) Depth: 15/43 00:21:47 275575kN 1...Bh4 2.Rh3 Bf6 3.b3 Rc8 4.Rg3 Qe7 ² (0.27) Depth: 15/43 00:32:23 407266kN 1...Nd5 2.Bc2 Qb6 3.b3 Nb4 4.Be4 Rad8 5.Nc4 Rxd4 ² (0.26) Depth: 15/43 00:41:59 524873kN 1...Nd5 2.Bc2 Ne7 3.Bg5 Bxg5 4.Rxg5 Rc8 5.Rg3 Nf5 6.Rc3 Qd6 7.Nxc6 Rxc6 8.Bxf5 gxf5 9.Qh5 = (0.22) Depth: 15/43 00:55:31 680024kN (Celeron 1.2GHz, 512MB hash, 3, 4 and 5 piece EGTB's 29.12.2002) Ernst.
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