Author: Kurt Utzinger
Date: 14:48:55 03/17/03
Go up one level in this thread
On March 17, 2003 at 17:21:47, Jorge Pichard wrote: >How many top programs will play the correct Qxe3+ in this position without its >ending database activated. > >This game was played between Keres vs Botvininnik in the 1948 championship. >Here Botvinnik calculated a straight-forward way to win by simply exchanging off >the queens. Here most programs would see this as a blunder by weakening the >position and leaving Black only slightly better. As a matter of fact most top >programs of today without it end game database would play Qd1? > >[D]8/kp6/P5p1/2p1p3/2PpP3/3P3Q/4q3/6K1 b - - 0 1 No problem for Shredder 7.04 New game 8/kp6/P5p1/2p1p3/2PpP3/3P3Q/4q3/6K1 b - - 0 1 Analysis by Shredder 7.04: 1...bxa6 -+ (-2.86) Depth: 1/1 00:00:00 1...bxa6 -+ (-2.86) Depth: 1/1 00:00:00 1...bxa6 2.Qh7+ Kb8 -+ (-2.42) Depth: 2/5 00:00:00 1...bxa6 2.Qh7+ Kb8 -+ (-2.42) Depth: 2/7 00:00:00 1...Qe3+ 2.Kg2 Kxa6 -+ (-2.52) Depth: 2/7 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kf1 -+ (-2.88) Depth: 2/7 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kf1 -+ (-2.88) Depth: 2/8 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kf1 Kc6 -+ (-2.99) Depth: 3/10 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.Kg2 Kxa6 4.Kf3 g5 5.Kxe3 -+ (-3.29) Depth: 4/12 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kf1 g5 5.Ke2 g4 -+ (-3.31) Depth: 4/12 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.axb7 g5 4.Kf1 Ka6 5.b8Q e2+ 6.Kxe2 -+ (-3.06) Depth: 5/12 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.axb7 g5 4.Kf1 Ka6 5.b8Q e2+ 6.Kxe2 -+ (-2.56) Depth: 5/12 00:00:00 1...Qe3+ 2.Qxe3 dxe3 3.axb7 g5 4.Kf1 Kxb7 5.Ke2 g4 6.Kxe3 Kc6 7.Kd2 µ (-1.31) Depth: 5/12 00:00:00 1...Qe1+ 2.Kg2 Kxa6 3.Qe6+ Ka5 4.Qf5 gxf5 µ (-1.32) Depth: 5/15 00:00:00 1...Qe1+ 2.Kg2 Kxa6 3.Qh8 Qe2+ 4.Kh1 Qxd3 5.Qxe5 -+ (-1.68) Depth: 5/15 00:00:00 1...Qe1+ 2.Kg2 Qd2+ 3.Kh1 Qd1+ 4.Kg2 Qg1+ 5.Kxg1 Kb8 -+ (-2.62) Depth: 5/15 00:00:00 1...Kxa6 2.Qd7 Qxd3 3.Qd6+ Ka5 4.Qa6+ bxa6 -+ (-2.63) Depth: 5/15 00:00:00 1...Kxa6 2.Qg3 Qe3+ 3.Kh1 g5 4.Qh3 -+ (-2.98) Depth: 5/15 00:00:00 1...Kxa6 2.Qe6+ b6 3.Qxe5 Qe3+ 4.Kg2 Qd2+ 5.Kg1 Qxd3 6.Qd5 -+ (-3.12) Depth: 5/15 00:00:00 1...Kxa6 2.Qe6+ b6 3.Qe8 b5 4.Qxe5 Qh2+ 5.Qxh2 -+ (-2.87) Depth: 6/17 00:00:00 1...Kxa6 2.Qe6+ b6 3.Qc6 Qe3+ 4.Kg2 Qd2+ 5.Kg1 Qd1+ 6.Kg2 Qg4+ 7.Kf2 Qf4+ 8.Kg2 Qd2+ 9.Kg1 Qd1+ 10.Kg2 Qg4+ 11.Kf2 Qf4+ 12.Kg2 Qd2+ 13.Kg1 -+ (-2.37) Depth: 6/17 00:00:00 1...Kxa6 2.Qe6+ b6 3.Qc6 Qg4+ 4.Kf2 Qf4+ 5.Kg2 g5 -+ (-2.28) Depth: 6/23 00:00:00 1...Qe1+ 2.Kg2 Qd2+ 3.Kf3 -+ (-2.29) Depth: 6/23 00:00:00 1...Qe1+ 2.Kg2 Qd2+ 3.Kg1 Qd1+ 4.Kg2 Qg1+ 5.Kxg1 Kb8 -+ (-2.46) Depth: 6/23 00:00:00 1...Qe1+ 2.Kg2 Qd2+ 3.Kg1 Qd1+ 4.Kg2 Qg1+ 5.Kxg1 Kb8 -+ (-2.46) Depth: 7/21 00:00:00 66kN 1...Qe1+ 2.Kg2 Qd2+ 3.Kg1 Qd1+ 4.Kg2 Qg1+ 5.Kxg1 Kb8 -+ (-2.43) Depth: 8/21 00:00:00 155kN 1...Qe1+ 2.Kg2 Qd2+ 3.Kg1 Qc1+ 4.Kg2 Qb2+ 5.Kf1 bxa6 6.Qe6 Qb1+ 7.Kg2 Qxd3 8.Qb6+ Kxb6 -+ (-2.68) Depth: 9/23 00:00:01 272kN 1...Qe1+ 2.Kg2 Qd2+ 3.Kg1 Qc1+ 4.Kg2 Qb2+ 5.Kf1 bxa6 6.Qd7+ Qb7 7.Qd6 Qb1+ 8.Ke2 Qc2+ 9.Ke1 Qxd3 10.Qxc5+ Kb7 11.Qxe5 Qxc4 -+ (-2.80) Depth: 9/23 00:00:01 293kN 1...Qe1+ 2.Kg2 Kxa6 3.Qc8 Qd2+ 4.Kh1 Qc1+ 5.Kh2 Qf4+ 6.Kh1 Qh4+ 7.Kg2 Qh7 -+ (-2.77) Depth: 10/27 00:00:02 794kN, tb=2 1...Qe1+ 2.Kg2 Qd2+ 3.Kh1 Qc1+ 4.Kg2 Qg5+ 5.Kf1 Kxa6 6.Qe6+ Ka5 7.Qc8 Qc1+ 8.Kg2 Qd2+ 9.Kh1 Qe1+ 10.Kg2 Qe2+ 11.Kg3 Qxd3+ 12.Kg2 Qxc4 13.Qxc5+ Qxc5 14.Kh3 -+ (-2.76) Depth: 11/29 00:00:04 1396kN, tb=3 1...Qe1+ 2.Kg2 Qd2+ 3.Kh1 Qc1+ 4.Kh2 Kxa6 5.Qg2 Qf4+ 6.Kh3 g5 7.Qa2+ Kb6 8.Qb1+ Kc7 9.Kg2 -+ (-2.76) Depth: 12/33 00:00:08 2882kN, tb=41 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kg3 -+ (-2.77) Depth: 12/33 00:00:10 3350kN, tb=103 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kg3 Ka5 6.Kg4 Kb4 7.Kg5 Kc3 8.Kxg6 -+ (-3.12) Depth: 12/33 00:00:10 3354kN, tb=103 1...Qe3+ 2.Qxe3 dxe3 3.axb7 e2 4.Kf2 Ka6 5.b8Q g5 -+ (-3.12) Depth: 12/33 00:00:10 3395kN, tb=103 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kg3 Ka5 6.Kf3 Kb4 7.Kxe3 g5 8.Kf3 Kc3 9.Ke2 g4 10.Ke3 g3 11.Kf3 Kxd3 12.Kxg3 Kxe4 -+ (-3.31) Depth: 13/23 00:00:10 3474kN, tb=134 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kf3 Ka5 6.Kxe3 Kb4 7.Kd2 g5 8.Kc2 g4 9.Kd2 g3 10.Ke2 Kc3 11.Kf3 Kxd3 12.Kxg3 Kxe4 -+ (-3.31) Depth: 14/25 00:00:12 4116kN, tb=206 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kf3 Ka5 6.Kxe3 Kb4 7.Kd2 g5 8.Kc2 g4 9.Kd2 g3 10.Ke2 Kc3 11.Kf3 Kxd3 12.Kxg3 Kxe4 -+ (-3.31) Depth: 15/28 00:00:18 5925kN, tb=388 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kf3 Ka5 6.Kxe3 Kb4 7.Kd2 g5 8.Kc2 g4 9.Kd2 g3 10.Ke2 Kc3 11.Kf3 Kxd3 12.Kxg3 Kxe4 -+ (-3.31) Depth: 16/31 00:00:32 9741kN, tb=854 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kf3 Ka5 6.Kxe3 Kb4 7.Kd2 g5 8.Kc2 g4 9.Kd2 g3 10.Ke2 Kc3 11.Ke3 g2 -+ (-3.37) Depth: 17/40 00:01:09 20510kN, tb=2891 1...Qe3+ 2.Qxe3 dxe3 3.axb7 Kxb7 4.Kg2 Kb6 5.Kf3 Ka5 6.Kxe3 Kb4 7.Kd2 g5 8.Kc2 g4 9.Kd2 Kb3 10.d4 Ka4 11.dxc5 g3 12.c6 g2 -+ (-3.12) Depth: 18/38 00:02:22 42330kN, tb=6895 (Utzinger, MyTown 17.03.2003)
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