Author: Uri Blass
Date: 14:40:52 10/26/01
Go up one level in this thread
On October 26, 2001 at 11:24:58, Rafael Andrist wrote: >On October 26, 2001 at 08:21:04, Uri Blass wrote: > >>[D]8/5P2/4K2k/8/1P2p2p/p7/6R1/5r2 b - - 0 55 bm h3 >> >>Fritz7 played 56...e3 and lost against Shredder5.32 when 56...h3 is enough for a draw. > >There must be a bug in Fritz7, I don't think this is only an overestimation of >passed pawns. > >Wilhelm needs 2 sec (on PII, 400 Mhz) and 5 plys to see that h3 is drawn (+0.01) >and that e3 loses (+0.94). At higher depths is dislikes it even more. > >Rafael B. Andrist If there is a bug in Fritz7 this bug is common also to comet Comet needs almost a minute to find the winning move after e3 New position [D]8/5P2/4K2k/8/1P5p/p3p3/6R1/5r2 w - - 0 1 Analysis by Comet B31: 2.f8Q+ Rxf8 -+ (-4.40) Depth: 1/3 00:00:00 2.b5 +- (1.74) Depth: 1/4 00:00:00 2.Rh2 +- (1.81) Depth: 1/4 00:00:00 2.Rh2 e2 3.f8R ² (0.55) Depth: 2/8 00:00:00 2.Re2 a2 3.f8R +- (1.50) Depth: 2/8 00:00:00 2.Re2 a2 3.Rxa2 = (0.05) Depth: 2/8 00:00:00 2.Rh2 e2 ² (0.55) Depth: 2/8 00:00:00 2.Ra2 e2 ² (0.67) Depth: 2/8 00:00:00 2.Ra2 e2 3.Rxe2 ³ (-0.69) Depth: 2/8 00:00:00 2.Rh2 e2 3.Rxh4+ Kg6 4.f8Q e1Q+ ² (0.31) Depth: 2/8 00:00:00 2.Rh2 e2 3.Rxe2 ± (1.28) Depth: 2/8 00:00:00 2.Rh2 e2 3.Rxh4+ Kg6 4.Rh6+ Kxh6 5.f8Q+ ± (0.72) Depth: 3/9 00:00:00 2.Re2 h3 3.b5 Kg7 ± (1.13) Depth: 3/10 00:00:00 2.f8N ± (1.14) Depth: 3/11 00:00:00 2.f8N ± (0.87) Depth: 3/11 00:00:00 2.f8N Rxf8 ³ (-0.31) Depth: 3/11 00:00:00 2.Re2 Kg6 3.Rd2 ² (0.56) Depth: 3/11 00:00:00 2.Re2 Kg7 3.Kd5 ² (0.29) Depth: 3/11 00:00:00 2.Re2 Kg7 3.Rb2 = (0.01) Depth: 3/11 00:00:00 2.Rh2 e2 3.Rxe2 ² (0.48) Depth: 3/11 00:00:00 2.Rh2 e2 3.f8N ² (0.34) Depth: 4/11 00:00:00 2.b5 a2 3.Rxa2 h3 4.b6 Rf2 5.Rxf2 exf2 ² (0.64) Depth: 4/13 00:00:00 2.b5 e2 3.Rxe2 Kg7 4.Rg2+ Kf8 ± (0.84) Depth: 4/13 00:00:00 2.b5 e2 3.Rxe2 ± (0.84) Depth: 5/15 00:00:00 59kN 2.b5 h3 3.Rh2 e2 4.Rxe2 Kg6 5.Kd7 ² (0.70) Depth: 6/16 00:00:00 110kN 2.b5 h3 3.Kd6 hxg2 4.b6 g1Q 5.b7 ² (0.43) Depth: 6/16 00:00:00 237kN 2.b5 h3 3.Kd6 hxg2 4.b6 g1Q 5.b7 = (0.16) Depth: 6/16 00:00:00 277kN 2.b5 h3 3.Kd6 hxg2 4.b6 g1Q 5.b7 = (-0.11) Depth: 6/16 00:00:01 314kN 2.Rh2 Kg6 3.Rg2+ Kh6 = (0.00) Depth: 6/16 00:00:01 347kN 2.Rh2 Kg6 3.Rg2+ Kh6 = (0.00) Depth: 7/18 00:00:01 437kN 2.Rh2 Kg6 3.Rg2+ Kh6 = (0.00) Depth: 8/20 00:00:02 782kN 2.Rh2 Kg6 3.Rg2+ Kh6 = (0.00) Depth: 9/21 00:00:05 1651kN 2.Rh2 Kg6 3.Rg2+ Kh6 = (0.00) Depth: 10/23 00:00:10 3192kN 2.Rh2 Kg6 3.Rg2+ Kh6 = (0.00) Depth: 11/26 00:00:21 6932kN 2.Rh2 Kg6 3.Rg2+ Kh6 = (0.00) Depth: 12/26 00:00:42 14012kN 2.Ke7 h3 3.Rg1 e2 4.f8Q+ Kh5 5.Rxf1 exf1N = (0.13) Depth: 12/26 00:00:53 17062kN 2.Ke7 e2 3.Rxe2 a2 4.Rxa2 h3 5.f8Q+ Kh5 ² (0.40) Depth: 12/26 00:00:53 17250kN 2.Ke7 h3 3.Rg1 e2 4.Rxf1 exf1Q 5.f8N ² (0.40) Depth: 12/26 00:00:54 17540kN 2.Ke7 h3 3.Rg1 e2 4.f8Q+ Rxf8 5.Kxf8 a2 6.b5 h2 7.Re1 Kg5 8.b6 Kf5 9.b7 Ke4 10.b8Q a1Q ² (0.53) Depth: 13/27 00:01:12 23971kN 2.Ke7 e2 3.Rxe2 a2 4.Rxa2 h3 5.f8Q+ Kh7 ± (0.80) Depth: 13/27 00:01:13 24368kN 2.Ke7 e2 3.Rxe2 a2 4.Rxa2 h3 5.f8Q+ Kh7 ± (1.07) Depth: 13/27 00:01:15 25030kN 2.Ke7 e2 3.Rxe2 a2 4.Rxa2 h3 5.f8Q+ Kh7 ± (1.34) Depth: 13/27 00:01:16 25408kN 2.Ke7 e2 3.Rxe2 a2 4.Rxa2 h3 5.f8Q+ Kh7 +- (1.61) Depth: 13/27 00:01:17 25830kN 2.Ke7 e2 3.Rxe2 a2 4.Rxa2 h3 5.f8Q+ Kh7 +- (1.88) Depth: 13/27 00:01:19 26911kN 2.Ke7 h3 3.Rg1 e2 4.Rxf1 exf1Q 5.f8N +- (1.88) Depth: 13/27 00:01:23 28249kN (Blass, Tel-aviv 26.10.2001) The following position after 1...e3 2.Ke7 h3 3.Rg1 e2 4.f8Q+ Rxf8 5.Kxf8 demonstrates the problem. Fritz believes at small depthes that black has a better position and that the passed pawns of black are equal more than the rook. It needs depth 9 to see white's advantage and it means big depth from the root position New position [D]5K2/8/7k/8/1P6/p6p/4p3/6R1 b - - 0 1 Analysis by Deep Fritz: 5...e1Q! +- (1.81) Depth: 1/3 00:00:00 5...h2! +- (1.53) Depth: 1/3 00:00:00 5...h2! -+ (-1.41) Depth: 1/3 00:00:00 5...h2 6.Re1 µ (-1.28) Depth: 2/3 00:00:00 5...h2 6.Rh1 Kg5 -+ (-1.56) Depth: 3/7 00:00:00 5...h2-- µ (-1.22) Depth: 4/6 00:00:00 5...h2-- 6.Rh1 Kg5 7.Ke7 µ (-1.09) Depth: 4/7 00:00:00 5...h2! -+ (-1.41) Depth: 5/9 00:00:00 5...h2-- µ (-1.09) Depth: 6/9 00:00:00 1kN 5...h2-- 6.Re1 a2 µ (-1.03) Depth: 6/12 00:00:00 2kN 5...h2 6.Re1 a2 7.Ke7 Kg5 8.Kd6 Kf4 µ (-1.31) Depth: 7/15 00:00:00 6kN 5...h2-- µ (-1.00) Depth: 8/13 00:00:00 7kN 5...h2-- 6.Re1 a2 7.Ke7 Kg5 8.Kd6 Kf4 µ (-0.88) Depth: 8/16 00:00:00 11kN 5...h2-- ³ (-0.56) Depth: 9/16 00:00:00 20kN 5...h2-- 6.Rh1 Kg5 7.b5 Kg4 8.b6 Kf3 9.b7 Kg2 10.b8Q ± (0.78) Depth: 9/16 00:00:00 27kN 5...h2-- ± (1.09) Depth: 10/14 00:00:00 42kN, tb=1 5...h2-- 6.Rh1 Kg5 7.b5 a2 8.b6 Kf4 9.b7 e1Q ± (1.34) Depth: 10/18 00:00:00 51kN, tb=1 5...h2-- +- (1.66) Depth: 11/17 00:00:00 67kN, tb=1 5...h2-- +- (1.66) Depth: 11/21 00:00:00 86kN, tb=1 5...h2-- +- (1.97) Depth: 12/18 00:00:00 111kN, tb=1 5...h2-- +- (1.97) Depth: 12/19 00:00:00 142kN, tb=1 5...a2! +- (1.94) Depth: 12/19 00:00:00 184kN, tb=2 5...a2-- +- (2.25) Depth: 13/20 00:00:00 224kN, tb=2 5...a2-- +- (2.25) Depth: 13/20 00:00:00 290kN, tb=5 5...h2! +- (2.22) Depth: 13/21 00:00:00 369kN, tb=7 5...h2! 6.Rh1 a2 7.b5 +- (2.19) Depth: 13/21 00:00:00 388kN, tb=7 5...h2-- +- (2.50) Depth: 14/22 00:00:00 450kN, tb=11 5...h2-- 6.Ra1 Kg5 7.b5 a2 8.b6 e1Q 9.Rxe1 h1Q 10.Rxh1 +- (5.87) Depth: 14/26 00:00:02 919kN, tb=34 5...a2! +- (5.84) Depth: 14/26 00:00:02 996kN, tb=36 5...a2! 6.b5 e1Q 7.Rxe1 +- (5.59) Depth: 14/26 00:00:02 1045kN, tb=39 5...a2-- +- (5.91) Depth: 15/25 00:00:02 1155kN, tb=44 5...a2-- +- (5.91) Depth: 15/29 00:00:03 1787kN, tb=80 5...h2! +- (5.87) Depth: 15/29 00:00:04 2220kN, tb=119 5...h2 6.Rh1 Kg5 7.b5 e1Q 8.Rxe1 a2 +- (5.91) Depth: 16/32 00:00:05 2965kN, tb=195 5...h2-- +- (6.22) Depth: 17/29 00:00:05 3373kN, tb=216 5...h2-- 6.Rh1 Kg5 7.b5 Kf4 8.b6 Kf3 9.b7 Kg2 10.Rxh2+ Kf3 11.Rxe2 +- (9.00) Depth: 17/31 00:00:08 5280kN, tb=339 (Blass, Tel-aviv 26.10.2001) Comet has also similiar opinion and needs depth 7 to see white advantage New position 5K2/8/7k/8/1P6/p6p/4p3/6R1 b - - 0 1 Analysis by Comet B31: 5...e1Q 6.Rxe1 +- (4.94) Depth: 1/3 00:00:00 5...a2 µ (-1.14) Depth: 1/3 00:00:00 5...h2 6.Rh1 Kg5 7.b5 a2 8.b6 µ (-0.80) Depth: 5/13 00:00:00 5...h2 6.Rh1 Kg5 7.b5 a2 8.b6 µ (-0.80) Depth: 5/13 00:00:00 5...h2 6.Rh1 Kg5 7.b5 a2 8.b6 µ (-0.80) Depth: 5/13 00:00:00 5...h2 6.Rh1 Kg5 7.b5 a2 8.b6 µ (-0.80) Depth: 5/13 00:00:00 5...h2 6.Re1 Kg5 7.b5 Kf4 ³ (-0.52) Depth: 5/16 00:00:00 25kN 5...h2 6.Re1 Kg5 7.b5 Kf4 8.b6 a2 9.b7 = (-0.09) Depth: 6/16 00:00:00 38kN 5...h2 6.Re1 Kg5 7.b5 Kf4 8.b6 a2 9.b7 Kf5 10.b8Q h1Q ± (0.78) Depth: 7/16 00:00:00 60kN 5...h2 6.Re1 Kg5 7.b5 Kf4 8.b6 Ke3 9.b7 Kd2 +- (1.49) Depth: 7/18 00:00:00 126kN 5...h2 6.Ra1 a2 7.b5 Kg5 8.b6 Kg4 9.b7 Kf3 10.b8Q h1Q 11.Rxh1 e1Q +- (2.35) Depth: 8/18 00:00:02 277kN 5...h2 6.Ra1 a2 7.b5 Kg5 8.b6 Kf4 9.b7 Ke3 10.b8Q +- (2.99) Depth: 8/20 00:00:02 425kN 5...h2 6.Ra1 a2 7.Rxa2 e1Q 8.Rxh2+ Kg6 9.b5 +- (2.14) Depth: 9/20 00:00:04 698kN 5...h2 6.Rh1 Kg5 7.b5 Kf4 8.b6 Kf3 +- (1.54) Depth: 9/20 00:00:04 781kN 5...h2 6.Rh1 Kg5 7.b5 Kf4 8.b6 Kf3 9.b7 Ke4 10.b8Q e1R +- (2.40) Depth: 10/20 00:00:04 867kN 5...h2 6.Rh1 e1Q 7.Rxe1 a2 8.b5 Kg5 9.Rh1 Kf5 10.b6 Ke4 11.b7 +- (4.04) Depth: 10/20 00:00:05 1091kN 5...h2 6.Rh1 Kg5 7.b5 a2 +- (3.19) Depth: 11/22 00:00:10 2236kN 5...h2 6.Ra1 Kg5 7.b5 Kg4 8.b6 Kg3 9.b7 Kg2 10.b8Q h1R +- (2.80) Depth: 11/22 00:00:12 2930kN 5...h2 6.Ra1 Kg5 7.b5 Kg4 8.b6 Kg3 9.b7 Kf4 10.b8Q+ Kg4 +- (3.66) Depth: 12/22 00:00:13 3012kN (Blass, Tel-aviv 26.10.2001) Uri
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