Author: Uri Blass
Date: 08:17:22 02/22/02
Go up one level in this thread
On February 22, 2002 at 10:59:40, Janosch Zwerensky wrote: >[D]3r3k/5p1p/1p1P1P2/p7/P2RNKP1/1P6/2r5/8 w - - 0 45 > >I think white has a forced win here: > >45. Rc4 Rxc4 (forced according to Chess tiger) >46. bc: Kg8 (forced) >47. Ke5 Kf8 (forced) >48. Kd5 Ke8 (forced) >49. Sf2 and Chess Tiger gives a +2 eval for white Here is yace analysis of the after Rc4 Rxc4 bxc4 New game - Junior 7 [D]3r3k/5p1p/1p1P1P2/p7/P1P1NKP1/8/8/8 b - - 0 1 Analysis by Yace 0.99.56: 46...Rxd6 47.Nxd6 +- (4.17) Depth: 1 00:00:09 46...h5 47.gxh5 +- (1.92) Depth: 1 00:00:09 46...Re8 ² (0.59) Depth: 1 00:00:09 46...Re8 47.d7 Rd8 ± (0.85) Depth: 2 00:00:09 46...Rd7 47.c5 ² (0.67) Depth: 2 00:00:09 46...Rd7 47.g5 ² (0.67) Depth: 2 00:00:09 46...Kg8 47.Kf5 ² (0.58) Depth: 2 00:00:09 46...Kg8 47.Kf5 Kf8 ² (0.50) Depth: 3 00:00:09 46...Kg8 47.Kf5 Rd7 48.g5 ² (0.41) Depth: 4 00:00:10 46...Kg8 47.Ke5 Rd7 48.Ng5 h6 ² (0.49) Depth: 5 00:00:10 3kN 46...Kg8 47.Kg5 Rd7 48.Kh6 Rd8 49.g5 ² (0.44) Depth: 6 00:00:13 7kN 46...Kg8 47.Ke5 Kf8 48.Kd5 Re8 49.d7 Rd8 50.Kd6 ² (0.43) Depth: 7 00:00:16 16kN 46...Kg8 47.Ke5 Kf8 48.Kd5 h6 49.c5 bxc5 50.Nxc5 ² (0.34) Depth: 8 00:00:22 40kN 46...Kg8 47.Ke5 Kf8 48.Kd5 Ke8 49.c5 bxc5 50.Nxc5 Rb8 51.g5 ² (0.40) Depth: 9 00:00:30 82kN 46...Kg8 47.Ke5 h6 48.c5 bxc5 49.Nxc5 Re8+ 50.Kf5 Re1 51.d7 Rc1 52.d8Q+ Kh7 ² (0.61) Depth: 10 00:00:38 189kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 h6 50.d7 Kg8 51.Kf5 Kf8 52.Kf4 Kg8 53.Ke5 Kf8 54.Kf5 ² (0.62) Depth: 11 00:00:40 417kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 h6 50.d7 Kg8 51.Kf5 Kf8 52.Kf4 Kg8 53.Ke4 ² (0.62) Depth: 12 00:00:40 662kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Re8+ 50.Kd5 Ra8 51.d7 Rd8 52.Kd4 ² (0.70) Depth: 13 00:00:41 1197kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.d7+ Rxd7 51.Nxd7 Kxd7 52.Kd5 h6 53.Kc5 Ke6 54.Kb5 Kxf6 55.Kxa5 ± (0.84) Depth: 14 00:00:44 2270kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.Kd5 h6 51.Kc6 Rc8+ 52.Kb6 Rb8+ 53.Kxa5 Ra8+ 54.Kb5 h5 55.gxh5 Kf8 ± (1.24) Depth: 15 00:00:49 4750kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.Kd4 ± (1.24) Depth: 15 00:00:50 5283kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.Kd4 Ra8 51.Kd5 Kd8 52.Kc6 Rc8+ 53.Kb5 h6 54.Nd3 Kd7 55.Ne5+ Kxd6 56.Nxf7+ Ke6 57.Nxh6 ± (0.84) Depth: 16 00:00:57 8754kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.Kd5 Rb8 51.d7+ Kd8 52.Kc6 Rb4 53.Nb7+ Rxb7 54.Kxb7 Kxd7 55.Kb6 Ke6 56.Kxa5 Ke5 57.Kb5 Kf4 58.Kb6 Kxg4 59.a5 ± (0.78) Depth: 16 00:01:00 9749kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.Kd5 Kf8 51.d7 Re8 ± (1.18) Depth: 17 00:01:14 16390kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.Kd5 ± (1.21) Depth: 17 00:01:18 18420kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.d7+ Rxd7 51.Nxd7 Kxd7 52.Kd5 h6 53.Kc5 Ke6 54.Kb5 Kxf6 55.Kxa5 Ke5 56.Kb6 f5 57.gxf5 h5 58.a5 +- (1.41) Depth: 18 00:01:57 36098kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.d7+ Rxd7 51.Nxd7 Kxd7 52.Kd5 h6 53.Kc5 Ke6 54.Kb5 Kxf6 55.Kxa5 Ke5 56.Kb6 f5 57.gxf5 h5 +- (1.41) Depth: 19 00:03:32 76674kN 46...Kg8 47.Ke5 Kf8 48.c5 bxc5 49.Nxc5 Ke8 50.d7+ Rxd7 51.Nxd7 Kxd7 52.Kd5 h6 53.Kc5 Ke6 54.Kb5 Kxf6 55.Kxa5 h5 56.gxh5 Kg5 57.Kb4 f5 58.Kc5 Kxh5 59.Kd4 f4 60.a5 f3 61.Ke3 +- (1.81) Depth: 20 00:07:17 172139kN 46...Kg8 47.Ke5 Kf8 48.Kd5 Ke8 49.c5 bxc5 50.Nxc5 h6 51.Kc6 Rc8+ 52.Kb6 Kd8 53.d7 Rb8+ 54.Kc6 Rb1 55.Nb7+ Rxb7 56.Kxb7 Kxd7 57.Kb6 Kd6 58.Kxa5 Kc5 59.Ka6 Kc4 60.Kb6 h5 61.gxh5 Kd4 +- (2.46) Depth: 20 00:09:38 234427kN (Blass, Tel-aviv 22.02.2002) I gave yace to go back in order to learn Here is what yace said about move 45 New game - Junior 7 3r3k/5p1p/1p1P1P2/p7/P1R1NKP1/1P6/2r5/8 b - - 0 1 Analysis by Yace 0.99.56: 45...Rxc4 46.bxc4 Kg8 47.Ke5 Kf8 48.Kd5 Ke8 49.c5 bxc5 50.Nxc5 h6 51.d7+ Kf8 52.Kc6 Rb8 +- (2.46) Depth: 1 00:00:00 45...Re2 ² (0.40) Depth: 1 00:00:00 45...Re2 46.Rc7 ² (0.67) Depth: 2 00:00:00 45...Re2 46.Rc7 Re8 ² (0.48) Depth: 3 00:00:00 45...Re2 46.Kf3 Rxe4 47.Rxe4 Rxd6 ² (0.52) Depth: 4 00:00:00 45...Re2 46.d7 Rxe4+ 47.Rxe4 h5 48.gxh5 Re8 ± (0.92) Depth: 5 00:00:00 6kN 45...Re2 46.d7 Re1 47.Rc8 Rf1+ 48.Ke5 Rg8 49.d8Q Rxd8 50.Rxd8# +- (1.91) Depth: 5 00:00:00 6kN 45...Rg2 46.d7 h5 47.Rc8 Rxg4+ 48.Ke5 +- (1.90) Depth: 5 00:00:00 6kN 45...Rg2 46.Rc7 Kg8 47.Rb7 Re8 ± (0.95) Depth: 5 00:00:00 6kN 45...Rg2 46.Rc6 Rg8 47.g5 Rb8 48.Rc7 ± (1.00) Depth: 6 00:00:00 33kN 45...Rg2 46.Rc7 Rg8 47.g5 Rf8 48.Rb7 h5 ± (1.13) Depth: 7 00:00:00 48kN 45...Rg2 46.Rc7 Rg8 47.g5 Rf8 48.Rb7 Kg8 49.Rxb6 ± (1.28) Depth: 8 00:00:00 149kN 45...Rg2 46.Rc7 Rg8 47.g5 Rb2 48.Rxf7 Rxb3 49.Rb7 Rb4 50.f7 Rf8 +- (1.49) Depth: 9 00:00:00 333kN 45...Rg2 46.Rc7 h6 47.Rxf7 Rb2 48.g5 hxg5+ 49.Nxg5 Rh2 50.d7 Rf2+ 51.Ke5 Re2+ 52.Kd6 Rd2+ 53.Kc7 Rg8 +- (1.68) Depth: 10 00:00:02 834kN 45...Rg2 46.Rc7 Rg1 47.Rxf7 Rg8 48.g5 Rb1 49.d7 Rxb3 50.Re7 b5 51.f7 Rf8 +- (1.76) Depth: 11 00:00:07 2497kN 45...Rg2 46.d7 h5 47.Rc8 Rxg4+ 48.Ke5 Rgg8 49.Rxd8 Rxd8 50.Kd6 Kg8 51.Kc7 Rb8 52.d8Q+ Kh7 +- (2.16) Depth: 12 00:00:12 4421kN 45...Rg2 46.d7 h5 47.Rc8 Rxg4+ 48.Ke5 Rgg8 49.Rxd8 Rxd8 50.Kd6 Ra8 51.d8B +- (2.20) Depth: 12 00:00:13 5305kN 45...Rg2 46.d7 h5 47.Rc8 Rxg4+ 48.Ke5 Rgg8 49.Rxd8 Rxd8 50.Kd6 Ra8 51.Kc7 Kg8 52.Nd6 Ra7+ 53.Nb7 Ra8 54.d8Q+ +- (2.31) Depth: 13 00:00:18 7399kN 45...Rg2 46.d7 h5 47.Rc8 Rxg4+ 48.Ke5 Rgg8 49.Rxd8 Rxd8 50.Kd6 Kh7 51.Ke7 Rb8 52.d8Q Rxd8 53.Kxd8 h4 +- (2.32) Depth: 14 00:00:56 21871kN 45...Rg2 46.d7 h5 47.Rc8 Rxg4+ 48.Ke5 Rgg8 49.Rxd8 Rxd8 50.Kd6 Kg8 51.Kc7 Rf8 52.Nd6 Kh8 +- (2.71) Depth: 15 00:01:52 43289kN 45...Rxc4 46.bxc4 Kg8 47.Ke5 Kf8 48.Kd5 Ke8 49.c5 bxc5 50.Nxc5 h6 51.d7+ Kf8 +- (2.46) Depth: 15 00:01:53 44161kN 45...Rxc4 46.bxc4 Kg8 47.Ke5 Kf8 48.Kd5 Ke8 49.c5 bxc5 50.Nxc5 h6 51.d7+ Kf8 +- (2.46) Depth: 16 00:02:05 48596kN (Blass, Tel-aviv 22.02.2002) Yace is at depth 17 but of course there is no new information It seems that black has no chance after 44...Rc2 Uri
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