Author: Uri Blass
Date: 04:29:59 11/11/01
Go up one level in this thread
On November 10, 2001 at 18:11:49, Dieter Buerssner wrote: >On November 09, 2001 at 14:03:47, Uri Blass wrote: > >>I am interested only in the losing material moves in the main line(the analysis >>inside the game is only to help programs to get the right conclusion) >> >>Luba kristol - Uri blass [B80] >>[Blass,U] >> >>1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.Qd2 b5 8.f3 Bb7 >>9.0-0-0 Nbd7 10.g4 h6 11.Bd3 Ne5 12.Rhe1 b4 13.Nce2 d5 14.Ng3 a novelty? >>14...dxe4 15.Bxe4 Nxe4 16.Nxe4 Bxe4 17.fxe4 Bc5 [17...Nxg4 18.Bf4 e5 19.Qg2 h5 >>20.h3 exd4 21.hxg4 Rc8 (21...Qf6 22.e5 Qxf4+ 23.Kb1) 22.e5 g5 23.gxh5 b3 24.axb3 >>gxf4 25.e6] 18.Qe2 Qb6 19.Kb1 0-0 20.Rd2 a5 21.Red1 Rfd8 22.h3 a4 23.Ka1 b3 >>24.a3 Rac8 25.cxb3 [25.c3 Bxa3 26.bxa3 (26.Nf3 Bxb2+ 27.Kxb2 Rxd2+ 28.Nxd2 a3+) >>26...Qa5 27.Kb1 (27.Nb5 Rxd2 28.Bxd2 Nc4) 27...Nc4 28.Rd3 (28.Rc1 Nxa3+ 29.Kb2 >>Nc4+) 28...Nxa3+ 29.Kb2 Nc4+ 30.Kb1 Rxd4; >>25.g5 Bxd4 26.Rxd4 Rxd4 27.Bxd4 Rxc2] 25...axb3 26.Kb1 Qb7 27.Bf4 Nc4 28.Rd3 >>Bxa3 29.Rxb3 Qa6 30.Rdd3 Bxb2 0-1 >> >>I am interested to know if it can be proved be only material evaluation >>after learning that Rac8 wins more than 1 pawn. > >Analysing from back to front, in your main line, after 25...axb3 I get with >material only evaluation (German piece letters: S->N, L->B, T->R, D->Q): > > 6.34 0:00 -1.60 26.Df2 Sc4 27.e5 Sxd2 28.Txd2 Ta8 29.Kb1 (114.114) 183.1 > 7.01 0:01 -1.60 26.Df2 Sc4 27.e5 Sxd2 28.Txd2 Ta8 29.Kb1 Kh7 (206.928) >202.4 > 7.34 0:01 -1.60 26.Df2 Sc4 27.e5 Sxd2 28.Txd2 Ta8 29.Kb1 Kh7 (347.345) >210.1 > 8.01 0:02 -2.00-- 26.Df2 Sc4 27.e5 Sxd2 28.Txd2 Lxd4 29.Txd4 Txd4 30.Lxh6 >(549.219) 212.7 > 8.01 0:04 -2.68 26.Df2 Sc4 27.Tf1 f5 28.Tc1 Sxd2 29.Dxd2 e5 30.Txc5 Txc5 >(871.896) 209.0 > 8.03 0:04 -2.67++ 26.Sxb3 Txd2 27.Lxc5 Dxb3 28.Dxd2 Txc5 29.Th1 Da4 30.Dd8+ >De8 31.Dxe8+ Kh7 (1.051.210) 214.3 > 8.03 0:05 -2.60 26.Sxb3 Txd2 27.Lxc5 Dxb3 28.Dxd2 Txc5 29.Th1 Da4 30.Dd8+ >Kh7 31.Te1 (1.125.349) 215.1 > 8.25 0:08 -1.60++ 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (1.795.590) 223.0 > 8.25 0:08 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (1.795.591) 222.9 > 8.34 0:08 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (1.795.600) 222.9 > 9.01 0:08 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (1.795.601) 222.9 > 9.34 0:14 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (3.429.304) 231.1 > 10.01 0:14 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (3.429.305) 231.0 > 10.34 0:26 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (6.199.044) 235.1 > 11.01 0:26 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (6.199.045) 235.1 > 11.34 0:57 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (13.757.574) 239.9 > 12.01 0:57 -1.60 26.Df1 Ta8 27.Kb1 Db7 28.Sxb3 (13.757.575) 239.9 > >Pawn value is 0.8, so this is 2 pawns. It is no proof, because I cannot see how >to prove that with longer analysis white cannot win back material. > >I gave up to go further back, because I could not find a material advantage of 2 >pawns fast for your line 25. c3 Bxa3 26. Nf3 Bxb2+ 27. Kxb2 Rxd2+ 28.Nxd2 a3+. >What I found is N+3Ps (for black) vs. R here only. But I also did not try for >longer time. I believe that 26...Bxb2 is the wrong way to prove 2 pawns and the right move is 26...Rxd2 I post the game again with analysis of 26...Rxd2 at the end of this post The default yace could see 2.12 pawns for black after learning these lines for more than 3 hours on p800 and here is the analysis after learning that 26.Nxd2 and 26.Rxd2 are bad: Luba kristol - Uri blass 2r3k1/5pp1/1q2p2p/4n3/p3P1P1/bpP1BN1P/1P1rQ3/K2R4 w - - 0 1 Analysis by Yace 0.99.56: 27.Nxd2 Bc5 28.Bxc5 Qxc5 29.Kb1 a3 -+ (-2.19) Depth: 1 00:00:00 27.Bxd2 µ (-1.23) Depth: 1 00:00:00 27.Qxd2 µ (-1.14) Depth: 1 00:00:00 27.Qxd2 Bc5 28.Bxc5 Qxc5 29.Nxe5 Qxe5 µ (-0.92) Depth: 2 00:00:00 27.Qxd2 Bc5 28.Bxc5 Qxc5 29.Nxe5 Qxe5 µ (-0.92) Depth: 3 00:00:00 27.Qxd2 Bc5 28.Bxc5 Qxc5 29.Nxe5 Qxe5 µ (-0.92) Depth: 4 00:00:00 27.Qxd2 Nxf3 28.Bxb6 Nxd2 29.Rxd2 Bc5 30.Bxc5 µ (-0.87) Depth: 5 00:00:00 17kN 27.Qxd2 Nxf3 28.Bxb6 Nxd2 29.Rxd2 Bc5 30.Bxc5 Rxc5 µ (-0.87) Depth: 6 00:00:00 52kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Qxe4 30.Nxf7 Kxf7 31.Rd8 µ (-1.27) Depth: 7 00:00:00 149kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Qxe4 30.Nd7 Qe3 31.Rc1 Qxh3 µ (-1.40) Depth: 7 00:00:00 149kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Qxe4 30.Nd7 Qe3 31.c4 Rxc4 32.Ne5 -+ (-1.42) Depth: 8 00:00:01 419kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Qxe4 30.Nd7 Qe3 31.Rc1 Rc7 32.Nb8 Qxh3 -+ (-1.57) Depth: 9 00:00:02 791kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Rxc3 30.Qb1 Rc2 31.Rd8+ Kh7 32.Qxb3 axb3 33.g5 -+ (-1.97) Depth: 10 00:00:05 1995kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Rxc3 -+ (-1.97) Depth: 10 00:00:10 3600kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Rxc3 30.g5 Rc2 31.g6 fxg6 32.Qd4 Qxd4+ 33.Kb1 a3 34.Nxg6 -+ (-2.37) Depth: 11 00:00:16 6429kN 27.Qxd2 Bxb2+ 28.Qxb2 Qxe3 29.Nxe5 Rxc3 -+ (-2.37) Depth: 11 00:00:22 8507kN 27.Nxd2 Bc5 28.Bxc5 Qxc5 29.Kb1 a3 -+ (-2.19) Depth: 11 00:00:23 9297kN 27.Rxd2 Bc5 28.Bxc5 Qxc5 29.Nxe5 Qxe5 30.Qd3 a3 -+ (-2.12) Depth: 11 00:00:23 9297kN 27.Rxd2 Bc5 28.Bxc5 Qxc5 29.Nxe5 Qxe5 30.Qd3 a3 -+ (-2.12) Depth: 12 00:00:32 12369kN 27.Rxd2 Bc5 28.Bxc5 Qxc5 29.Nxe5 Qxe5 30.Qd3 a3 -+ (-2.12) Depth: 13 00:01:07 25181kN (Blass, Tel-aviv 11.11.2001) Luba kristol - Uri blass [B80] [Blass,U] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.Qd2 b5 8.f3 Bb7 9.0-0-0 Nbd7 10.g4 h6 11.Bd3 Ne5 12.Rhe1 b4 13.Nce2 d5 14.Ng3 14...dxe4 15.Bxe4 Nxe4 16.Nxe4 Bxe4 17.fxe4 Bc5 18.Qe2 Qb6 19.Kb1 0-0 20.Rd2 a5 21.Red1 Rfd8 22.h3 a4 23.Ka1 b3 24.a3 Rac8 [24...Rdc8 25.c3 Bxa3 26.Nb5 Bc5 27.Bxc5 Qxc5 28.Na3 Nc4 29.Nxc4 Qxc4 30.Qxc4 Rxc4] 25.cxb3 [25.c3 Bxa3 26.bxa3 (26.Nf3 Bxb2+ (26...Rxd2 27.Rxd2 (27.Nxd2 Bc5 28.Bxc5 (28.Bf4 a3 29.Bxe5 Ra8) 28...Qxc5; 27...Bc5 28.Bxc5 (28.Nxe5 Bxe3 29.Rd3 Bf4 30.Nf3 Ra8 31.Kb1 a3) 28...Qxc5 29.Nxe5 Qxe5 30.Rd3 (30.Qf3 a3) 30...a3; 27.Kxb2 Rxd2+ 28.Nxd2 a3+; 26...Qa5 27.Kb1 (27.Nb5 Rxd2 28.Bxd2 Nc4) 27...Nc4 28.Rd3 (28.Rc1 Nxa3+ 29.Kb2 Nc4+) 28...Nxa3+ 29.Kb2 Nc4+ 30.Kb1 Rxd4; 25.g5 Bxd4 26.Rxd4 Rxd4 27.Bxd4 Rxc2] 25...axb3 26.Kb1 Qb7 27.Bf4 Nc4 28.Rd3 Bxa3 29.Rxb3 Qa6 30.Rdd3 Bxb2 0-1 Regards, Uri
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