Author: Enrique Irazoqui
Date: 15:58:58 02/28/01
Go up one level in this thread
On February 28, 2001 at 18:40:40, Sune Larsson wrote: > > [D]8/2k4p/p1p1bp2/8/1P2PP2/4K3/7P/5B2 w - - 0 1 > > This is a position used by chesstrainers in Georgia (former USSR]. > Got it from the horse's mouth during a combined vacation/chesstraining > stay in Tbilisi a few years ago. It's from the game Eliskases-Capablanca, > Semmering 1937. We have a bishop ending (same colors) with 4 pawns each. > White is on the move and to conserve winning chances, he must avoid early > simplification and - if possible - keep the pawns on both wings. > Thus 1.Bxa6 Kb6 followed by 2.-c5 constitutes a wrong approach whereas > 1.Kd4 is the right one. > > 1.Kd4 Kb6 [otherwise 2.Kc5] 2.Bc4 Bg4 [the pawn ending is lost] > 3.e5 fxe5+ 4.fxe5 h6 5.h4 Bh5 6.e6 Be8 and black had many problems > to overcome. White ultimately won the game. > > Test: 1. Kd4! should be chosen by your program. 1.Bxa6? draws. > > Sune On a P750, Deep Shredder instantly and Deep Fritz in 13 seconds play Kd4. 1.00 0:00 +1.97++ 1.Bxa6 (1) 0.1 1.00 0:00 +1.97 1.Bxa6 (2) 0.2 1.00 0:00 +2.24++ 1.Kd4 Kb6 (3) 0.3 1.00 0:00 +1.36 1.Kd4 Kb6 (4) 0.4 2.00 0:00 +2.24++ 1.Kd4 Kb6 (21) 2.1 2.00 0:00 +1.36 1.Kd4 Kb6 (23) 2.3 2.00 0:00 +1.66++ 1.Bxa6 Kd6 (44) 4.4 2.00 0:00 +1.86 1.Bxa6 Kd6 (65) 6.5 3.00 0:00 +1.84 1.Bxa6 Kd6 2.Kd4 (182) 18.2 4.00 0:00 +1.92 1.Bxa6 Kd6 2.Kd4 h5 (658) 65.8 5.00 0:00 +1.80 1.Bxa6 Kb6 2.Bd3 c5 3.b5 (2.009) 133.9 6.00 0:00 +1.71 1.Bxa6 Kb6 2.Be2 c5 3.f5 Bf7 (4.342) 51.0 7.01 0:00 +1.46-- 1.Bxa6 Kb6 2.Be2 c5 3.f5 Bf7 4.Bf3 (9.386) 85.3 7.01 0:00 +1.46 1.Bxa6 Kb6 2.Bd3 c5 3.b5 c4 4.f5 (10.809) 93.9 7.04 0:00 +1.47++ 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bf7 4.f5 c5 5.bxc5+ Kxc5 6.Bxa6 (21.619) 131.0 7.04 0:00 +1.62 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bf7 4.f5 a5 5.bxa5+ Kxa5 (24.920) 134.7 8.01 0:00 +1.62 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bd5 4.Bd3 h6 5.Bg6 Kb5 (45.870) 173.0 9.01 0:00 +1.58 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bd5 4.Bd3 h6 5.f5 a5 6.bxa5+ Kxa5 (87.236) 207.7 10.01 0:00 +1.67 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.Kd6 a5 5.bxa5+ Kxa5 6.Bd3 c5 7.Bxh7 (184.306) 240.9 11.01 0:01 +1.64 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.Kd6 a5 5.bxa5+ Kxa5 6.Kxc6 Kb4 7.Kd6 h5 (304.521) 255.9 12.01 0:02 +1.71 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.Kd6 Bc2 5.Be2 h6 6.Ke5 Bb3 7.f5 a5 8.bxa5+ Kxa5 (519.884) 258.5 13.01 0:04 +1.63 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.Kd6 h6 5.h4 Bd5 6.Bd3 a5 7.bxa5+ Kxa5 8.Bg6 Kb4 (1.065.777) 257.7 14.01 0:07 +1.88++ 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.f5 a5 5.bxa5+ Kxa5 6.f6 c5 7.Bd3 c4 8.Bxh7 c3 9.Kd4 (1.978.368) 247.8 best move: Ke3-d4 time: 0:11.551 min n/s: 240.473 nodes: 2.771.938 TB: 352 1.00 0:00 +1.97++ 1.Bxa6 (1) 1.0 1.00 0:00 +1.97 1.Bxa6 (2) 2.0 2.00 0:00 +1.86 1.Bxa6 Kd6 (47) 47.0 3.00 0:00 +1.84 1.Bxa6 Kd6 2.Kd4 (168) 168.0 4.00 0:00 +1.92 1.Bxa6 Kd6 2.Kd4 h5 (647) 647.0 5.00 0:00 +1.80 1.Bxa6 Kb6 2.Bd3 c5 3.b5 (2.403) 77.5 6.00 0:00 +1.71 1.Bxa6 Kb6 2.Be2 c5 3.f5 Bf7 (5.078) 133.6 7.01 0:00 +1.46-- 1.Bxa6 Kb6 2.Be2 c5 3.f5 Bf7 4.Bf3 (12.973) 170.6 7.01 0:00 +1.46 1.Bxa6 Kb6 2.Bd3 c5 3.e5 h6 4.exf6 cxb4 (14.582) 180.0 7.02 0:00 +1.47++ 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bf7 4.f5 c5 5.bxc5+ Kxc5 6.Bxa6 (21.244) 191.3 7.02 0:00 +1.62 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bf7 4.f5 a5 5.bxa5+ Kxa5 (24.097) 191.2 8.01 0:00 +1.62 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bd5 4.Bd3 h6 5.Bg6 Kb5 (49.776) 220.2 9.01 0:00 +1.58 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bd5 4.Bd3 h6 5.f5 a5 6.bxa5+ Kxa5 (95.751) 244.8 10.01 0:00 +1.67 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bg8 4.f5 a5 5.bxa5+ Kxa5 6.Kd6 Kb4 7.f6 (233.424) 264.9 11.01 0:01 +1.63 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bg8 4.Kd6 a5 5.bxa5+ Kxa5 6.Kxc6 Kb4 7.f5 Kc3 (421.991) 276.5 12.01 0:03 +1.78 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.Kd6 Bc2 5.Be2 Bf5 6.Bc4 a5 7.Ke5 Bh3 (882.119) 271.7 13.01 0:06 +1.63 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.Kd6 a5 5.bxa5+ Kxa5 6.Kc5 h6 7.f5 Bd5 8.f6 h5 (1.680.810) 277.5 14.01 0:13 +1.88++ 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Bb3 4.Kd6 a5 5.bxa5+ Kxa5 6.f5 Kb6 7.f6 Ba2 8.Bd3 Ka5 9.Kxc6 (3.615.915) 274.5 14.01 0:14 +1.93 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Ba2 4.Bd3 h6 5.Kd6 a5 6.bxa5+ Kxa5 7.Bg6 Kb5 8.f5 Bb1 (4.136.425) 277.2 15.01 0:24 +2.18++ 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Ba2 4.f5 c5 5.bxc5+ Kxc5 6.Bxa6 h6 7.Bc8 Bb1 8.f6 Be4 (6.973.537) 281.2 15.01 0:28 +2.24 1.Kd4 Kb6 2.e5 fxe5+ 3.Kxe5 Ba2 4.f5 a5 5.bxa5+ Kxa5 6.f6 h5 7.Kd6 Kb4 8.Ke7 c5 9.f7 Bxf7 10.Kxf7 (8.257.386) 284.8 Î New position 8/2k4p/p1p1bp2/8/1P2PP2/4K3/7P/5B2 w - - 0 1 Analysis by DEEP FRITZ : 1.Bxa6! ² (0.69) Depth: 1/2 00:00:00 1.Bxa6! ± (1.28) Depth: 1/2 00:00:00 1.Bxa6 Kd6 ± (1.22) Depth: 2/4 00:00:00 1.Bxa6 Kd6 2.Bb7 ± (1.28) Depth: 3/7 00:00:00 1.Bxa6 Kb6 2.Be2 c5 ± (1.25) Depth: 4/9 00:00:00 1.Bxa6 Kb6 2.Be2 c5 3.f5 ± (1.25) Depth: 5/10 00:00:00 1kN 1.Bxa6 Kb6 2.Be2 c5 3.f5 Bb3 ± (1.31) Depth: 6/11 00:00:00 2kN 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 ± (1.28) Depth: 7/13 00:00:00 5kN 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h5 ± (1.28) Depth: 8/14 00:00:00 10kN 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 Kd5 6.Kf4 ± (1.25) Depth: 9/14 00:00:00 20kN 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h5 6.Ke4 h4 ± (1.28) Depth: 10/16 00:00:00 43kN 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h5 6.Kf4 h4 ± (1.25) Depth: 11/18 00:00:00 101kN 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h5 6.h4 Kd5 ± (1.38) Depth: 12/18 00:00:00 249kN 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h5 6.h4 Kd5 ± (1.38) Depth: 13/20 00:00:01 464kN, tb=2 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h6 6.h4 Kd5 +- (1.41) Depth: 14/21 00:00:02 1201kN, tb=4 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h6 6.h4 Kd5 +- (1.47) Depth: 15/23 00:00:04 2277kN, tb=11 1.Bxa6 Kb6 2.Bd3 c5 3.bxc5+ Kxc5 4.e5 fxe5 5.fxe5 h6 6.h4 Kc6 +- (1.53) Depth: 16/24 00:00:09 5094kN, tb=44 1.Kd4! +- (1.56) Depth: 16/26 00:00:13 7794kN, tb=59 1.Kd4! Kb6 2.Bc4 Bd7 3.e5 fxe5+ 4.Kxe5 c5 5.bxc5+ Kxc5 6.Bxa6 h5 +- (1.81) Depth: 16/28 00:00:19 11228kN, tb=66 1.Kd4 Kb6 2.Bc4 Bc8 3.f5 Kc7 4.e5 fxe5+ 5.Kxe5 Bb7 6.f6 Kd7 +- (1.72) Depth: 17/27 00:00:28 16015kN, tb=111 1.Kd4 Kb6 2.Bc4 Bg4 3.e5 fxe5+ 4.Kxe5 a5 5.bxa5+ Kxa5 6.f5 Bh5 +- (1.88) Depth: 18/30 00:00:55 31537kN, tb=405 (Irazoqui, Cadaqués 01.03.2001)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.