Author: Mark Young
Date: 11:13:29 04/09/00
Go up one level in this thread
On April 09, 2000 at 13:49:48, Ernst Walet wrote: >On April 09, 2000 at 13:16:59, Mark Young wrote: >> >>I can explain this I think, it is a problem with Fritz 6a's probe depth of the >>tablebase. The default is set to 3, and below in the first analysis will find >>Fritz 6a can not see that Kf3 is a draw in a short time. Below that is the >>analysis of Fritz 6a with the probe depth of the tablebases set to 0. ( the >>lower the number the more fritz 6a probes the tablebases (more TB hits)) When >>set to a lower setting or more tablebase probes, Fritz 6a see very quickly that >>Kf3 is a draw and Kh3 is winning. >> >>New position >>8/8/5K2/6Q1/4ppk1/4P3/5q2/8 b - - 0 1 >> >>Analysis by Fritz 6: Tablebase depth set to 3(default) >> >>1...Kg4-f3 >> ³ (-0.69) Depth: 1/3 00:00:00 >>1...Kg4-f3 2.Qg5xf4+ Kf3-e2 >> = (-0.19) Depth: 1/5 00:00:00 >>1...Kg4-f3 2.Qg5xf4+ Kf3-e2 >> = (-0.19) Depth: 2/7 00:00:00 >>1...Kg4-h3 >> ³ (-0.44) Depth: 2/7 00:00:00 >>1...Kg4-h3 2.e3xf4 e4-e3 >> ³ (-0.44) Depth: 3/7 00:00:00 >>1...Kg4-h3! >> µ (-0.75) Depth: 4/6 00:00:00 >>1...Kg4-h3 2.e3xf4 e4-e3 3.Kf6-f5 >> µ (-0.88) Depth: 4/7 00:00:00 >>1...Kg4-h3 2.e3xf4 e4-e3 3.Kf6-f5 Qf2-c2+ 4.Kf5-e6 >> µ (-0.88) Depth: 5/9 00:00:00, tb=1 >>1...Kg4-h3 2.e3xf4 e4-e3 3.Kf6-f5 Qf2-c2+ 4.Kf5-e6 e3-e2 >> µ (-0.88) Depth: 6/13 00:00:00, tb=2 >>1...Kg4-h3 2.Qg5-f5+ Kh3-g2 3.e3xf4 e4-e3 4.Qf5-g4+ >> ³ (-0.69) Depth: 7/15 00:00:00 6kN, tb=8 >>1...Kg4-h3 2.Qg5-f5+ Kh3-g2 3.e3xf4 Kg2-f3 4.Qf5-g5 e4-e3 >> µ (-0.91) Depth: 8/20 00:00:00 46kN, tb=33 >>1...Kg4-h3 2.Qg5-f5+ Kh3-g2 3.e3xf4 Kg2-f3 4.Qf5-g5 e4-e3 >> µ (-0.91) Depth: 9/22 00:00:00 189kN, tb=136 >>1...Kg4-h3 2.Qg5-f5+ Kh3-g2 3.e3xf4 Kg2-f3 4.Qf5-g5 e4-e3 >> µ (-0.91) Depth: 10/25 00:00:01 510kN, tb=429 >>1...Kg4-f3 >> µ (-0.94) Depth: 10/25 00:00:02 654kN, tb=577 >>1...Kg4-f3 2.e3xf4 e4-e3 3.Kf6-f5 Qf2-c2+ 4.Kf5-f6 Qc2-c6+ 5.Kf6-f7 e3-e2 >>6.Qg5-h5+ >> -+ (-2.66) Depth: 10/25 00:00:04 1535kN, tb=890 >>1...Kg4-f3! >> -+ (-2.97) Depth: 11/27 00:00:06 2273kN, tb=1529 >>1...Kg4-f3! 2.Qg5-h5+ Kf3xe3 3.Qh5-c5+ Ke3-f3 4.Qc5-h5+ Kf3-g2 5.Qh5-g4+ Qf2-g3 >>6.Qg4-e2+ >> -+ (-4.13) Depth: 11/27 00:00:14 4839kN, tb=2776 >>1...Kg4-f3 2.Qg5-h5+ Kf3xe3 3.Qh5-c5+ Ke3-f3 4.Qc5-h5+ Kf3-g2 5.Qh5-g4+ Qf2-g3 >>6.Qg4-e2+ >> -+ (-4.19) Depth: 12/28 00:00:17 6124kN, tb=4307 >>1...Kg4-f3 2.Qg5-h5+ Kf3xe3 3.Qh5-c5+ Ke3-f3 4.Qc5-h5+ Kf3-g2 5.Qh5-g4+ Qf2-g3 >>6.Qg4-e2+ >> -+ (-4.38) Depth: 13/30 00:00:40 14115kN, tb=11538 >>1...Kg4-f3 2.Qg5-h5+ Kf3xe3 3.Qh5-c5+ Ke3-f3 4.Qc5-h5+ Kf3-g2 5.Qh5-g4+ Qf2-g3 >>6.Qg4-e2+ >> -+ (-4.44) Depth: 14/34 00:01:13 25644kN, tb=25364 >>1...Kg4-f3 2.Qg5-h5+ Kf3xe3 3.Qh5-c5+ Ke3-f3 4.Qc5-h5+ Kf3-g2 5.Qh5-g4+ Qf2-g3 >>6.Qg4-e2+ >> -+ (-4.69) Depth: 15/36 00:02:49 59277kN, tb=74801 >>1...Kg4-f3-- >> -+ (-4.38) Depth: 16/36 00:05:02 106030kN, tb=149103 >>1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 e4-e3 5.f4-f5 Ke2-d1 >>6.f5-f6 >> = (0.00) Depth: 16/36 00:05:07 107824kN, tb=151866 >>1...Kg4-h3 >> = (0.12) Depth: 16/37 00:05:36 118506kN, tb=171141 >> >>(Young, 09.04.2000) >> >>New position >>8/8/5K2/6Q1/4ppk1/4P3/5q2/8 b - - 0 1 >> >>Analysis by Fritz 6: Tablebase depth set to 0 >> >>1...Kg4-f3 >> ³ (-0.56) Depth: 1/1 00:00:00 >>1...Kg4-f3 >> ³ (-0.56) Depth: 1/1 00:00:00 >>1...Kg4-f3 >> ³ (-0.56) Depth: 2/2 00:00:00 >>1...Kg4-h3 >> µ (-0.88) Depth: 2/3 00:00:00 >>1...Kg4-h3 2.e3xf4 >> µ (-0.88) Depth: 3/6 00:00:00 >>1...Kg4-h3 2.e3xf4 >> µ (-0.88) Depth: 4/5 00:00:00 >>1...Kg4-h3 2.e3xf4 >> µ (-0.88) Depth: 5/5 00:00:00 >>1...Kg4-h3 2.e3xf4 >> µ (-0.88) Depth: 6/6 00:00:00, tb=6 >>1...Kg4-h3 2.e3xf4 >> µ (-0.88) Depth: 7/15 00:00:00, tb=15 >>1...Kg4-h3 2.e3xf4 >> µ (-0.88) Depth: 8/19 00:00:00 3kN, tb=68 >>1...Kg4-h3 2.e3xf4 e4-e3 3.Qg5-f5+ Kh3-g3 4.Qf5-g5+ Kg3-f3 5.f4-f5 e3-e2 >>6.Qg5-h5+ >> µ (-0.91) Depth: 9/22 00:00:00 117kN, tb=1240 >>1...Kg4-h3 2.e3xf4 e4-e3 3.Kf6-e5 e3-e2 4.Qg5-f5+ Kh3-h2 5.Qf5-h5+ Kh2-g1 >>6.Qh5-g4+ >> µ (-1.16) Depth: 10/24 00:00:01 379kN, tb=4094 >>1...Kg4-f3 >> µ (-1.19) Depth: 10/24 00:00:02 505kN, tb=5624 >>1...Kg4-f3 2.Qg5-h5+ Kf3xe3 3.Qh5-c5+ Ke3-f3 4.Qc5-h5+ Kf3-g2 5.Qh5-g4+ Qf2-g3 >>6.Qg4-e2+ >> -+ (-4.28) Depth: 10/24 00:00:09 2460kN, tb=18974 >>1...Kg4-f3-- >> -+ (-3.97) Depth: 11/27 00:00:10 3003kN, tb=24331 >>1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 e4-e3 5.f4-f5 Ke2-d2 >>6.f5-f6 >> µ (-0.75) Depth: 11/27 00:00:11 3061kN, tb=25305 >>1...Kg4-h3 >> µ (-0.78) Depth: 11/27 00:00:12 3290kN, tb=28942 >>1...Kg4-h3 2.Qg5-f5+ Kh3-h2 3.e3xf4 e4-e3 4.Kf6-e5 Qf2-b2+ 5.Ke5-e6 e3-e2 >>6.Qf5-a5 >> µ (-1.28) Depth: 11/27 00:00:18 4943kN, tb=43577 >>1...Kg4-h3 2.Qg5-f5+ Kh3-h2 3.Qf5-h5+ Kh2-g2 4.Qh5-g5+ Kg2-f1 5.e3xf4 e4-e3 >>6.Qg5-h6 >> -+ (-1.44) Depth: 12/29 00:00:22 5911kN, tb=56274 >>1...Kg4-f3 >> -+ (-1.47) Depth: 12/29 00:00:23 6242kN, tb=61537 >>1...Kg4-f3-- >> µ (-1.16) Depth: 13/22 00:00:24 6274kN, tb=62399 >>1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 e4-e3 5.f4-f5 Ke2-d1 >> = (0.00) Depth: 13/26 00:00:25 6559kN, tb=67032 >>1...Kg4-h3 >> = (0.12) Depth: 13/28 00:00:27 7030kN, tb=75803 >>1...Kg4-h3 2.Qg5-f5+ Kh3-h2 3.Qf5-h5+ Kh2-g2 4.Qh5-g5+ Kg2-f1 5.e3xf4 e4-e3 >>6.Qg5-h6 >> -+ (-1.47) Depth: 13/31 00:00:35 9051kN, tb=99962 >>1...Kg4-h3! >> -+ (-1.78) Depth: 14/33 00:01:12 16737kN, tb=207690 >>1...Kg4-h3! 2.Qg5-f5+ Kh3-g2 3.Qf5xe4+ f4-f3 4.Kf6-e5 Qf2-g3+ 5.Ke5-f6 Qg3-d6+ >>6.Kf6-g5 >> -+ (-2.56) Depth: 14/33 00:01:28 20979kN, tb=261110 >> >>(Young, St. 09.04.2000) > > >The problem is not the probe depth, but the handling of 5 piece TBs, as with >only 3- and 4 piece TBs Fritz6a does play Kh3 from depth 7 at 0 seconds. > >Ernst. You could be right, but what ever the problem is it is only with Fritz 6a, Old fritz 6 and other programs work just fine. 8/8/5K2/6Q1/4ppk1/4P3/5q2/8 b - - 0 1 Analysis by Fritz 6 Old: 1...Kg4-f3 = (0.03) Depth: 1/2 00:00:00 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 = (0.12) Depth: 1/6 00:00:00 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 = (0.12) Depth: 2/8 00:00:00 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 = (0.00) Depth: 3/10 00:00:00 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 = (0.00) Depth: 4/11 00:00:00 1kN 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 Ke2-f3 = (-0.03) Depth: 5/14 00:00:00 6kN 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 Ke2-f3 5.f4-f5 = (0.03) Depth: 6/15 00:00:00 16kN, tb=4 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 = (0.00) Depth: 7/17 00:00:00 34kN, tb=22 1...Kg4-f3 2.Qg5xf4+ Kf3-e2 3.Kf6-e5 Qf2xf4+ 4.e3xf4 = (0.00) Depth: 8/20 00:00:00 87kN, tb=67 1...Kg4-h3 = (0.12) Depth: 8/21 00:00:00 193kN, tb=190 1...Kg4-h3 2.e3xf4 e4-e3 3.Kf6-e5 e3-e2 4.Qg5-h5+ Kh3-g3 5.Qh5-g6+ Kg3-f3 6.Qg6-c6+ = (0.00) Depth: 9/21 00:00:01 474kN, tb=431 1...Kg4-h3 2.e3xf4 e4-e3 3.Kf6-e5 Qf2-f3 4.f4-f5 e3-e2 5.Qg5-h6+ Kh3-g3 6.Qh6-d2 = (-0.03) Depth: 10/24 00:00:02 1056kN, tb=1247 1...Kg4-h3 2.e3xf4 e4-e3 3.Kf6-e5 Qf2-f3 4.Qg5-d8 e3-e2 5.Qd8-d2 Kh3-g4 6.Qd2-d7+ = (-0.06) Depth: 11/27 00:00:05 2153kN, tb=3068 1...Kg4-h3 2.Qg5-f5+ Kh3-h2 3.Qf5-h5+ Kh2-g2 4.Qh5-g5+ Qf2-g3 5.e3xf4 e4-e3 6.Qg5-d5+ ³ (-0.28) Depth: 12/29 00:00:10 4496kN, tb=8220 1...Kg4-h3 2.Qg5-f5+ Kh3-g2 3.Qf5xe4+ f4-f3 4.Kf6-f5 Qf2-g3 5.Kf5-f6 Qg3-g8 6.Qe4-c6 ³ (-0.44) Depth: 13/31 00:00:35 15064kN, tb=25183 1...Kg4-h3! µ (-0.75) Depth: 14/32 00:00:58 24560kN, tb=48054 (Young, 09.04.2000) > >New position >8/8/5K2/6Q1/4ppk1/4P3/5q2/8 b - - 0 1 > >Analysis by Fritz 6: > >1...Kf3 > ³ (-0.38) Depth: 1/3 00:00:00 >1...Kf3 2.Qxf4+ Ke2 > = (-0.19) Depth: 1/5 00:00:00 >1...Kf3 2.Qxf4+ Ke2 > = (-0.19) Depth: 2/7 00:00:00 >1...Kf3 2.Qxf4+ Ke2 3.Kf5 > = (-0.19) Depth: 3/9 00:00:00 >1...Kh3 > = (-0.22) Depth: 3/11 00:00:00 1kN >1...Kh3 2.Qf5+ > = (-0.25) Depth: 3/11 00:00:00 1kN >1...Kh3 2.exf4 Qb6+ 3.Kf5 e3 4.Qg4+ Kh2 > ³ (-0.34) Depth: 4/14 00:00:00 3kN >1...Kh3 2.Qf5+ Kg2 3.exf4 e3 4.Ke5 > ³ (-0.41) Depth: 5/14 00:00:00 8kN >1...Kf3! > ³ (-0.44) Depth: 5/14 00:00:00 11kN >1...Kf3! 2.exf4 e3 3.f5 e2 > µ (-0.78) Depth: 5/15 00:00:00 15kN >1...Kf3 2.Qxf4+ Ke2 3.Ke5 Qxf4+ 4.exf4 e3 5.f5 > ³ (-0.63) Depth: 6/15 00:00:00 24kN >1...Kf3 2.Qxf4+ Ke2 3.Ke5 Qxf4+ 4.exf4 e3 5.f5 Kd2 > ³ (-0.56) Depth: 7/18 00:00:00 38kN, tb=3 >1...Kh3 > ³ (-0.59) Depth: 7/18 00:00:00 57kN, tb=5 >1...Kh3 2.exf4 e3 3.Qf5+ Kg3 4.Kg5 e2 5.Qg4+ Kh2 > µ (-0.75) Depth: 7/19 00:00:00 79kN, tb=8 >1...Kh3 2.exf4 e3 3.Qf5+ Kg3 4.Qg5+ Kf3 5.f5 e2 6.Qh5+ > µ (-0.88) Depth: 8/20 00:00:01 137kN, tb=28 >1...Kh3 2.exf4 e3 3.Qf5+ Kg3 4.Qg5+ Kf3 5.f5 e2 6.Qh5+ > µ (-0.91) Depth: 9/24 00:00:02 291kN, tb=96 >1...Kh3 2.exf4 e3 3.Ke5 e2 4.Qf5+ Kh2 5.Qh5+ Kg1 6.Qg4+ > µ (-1.16) Depth: 10/26 00:00:04 812kN, tb=384 >1...Kh3 2.Qf5+ Kh2 3.exf4 e3 4.Ke5 e2 > µ (-1.34) Depth: 11/26 00:00:07 1668kN, tb=956 >1...Kh3 2.Qf5+ Kh2 3.Qh5+ Kg2 4.Qg5+ Kf1 5.exf4 e3 6.Qh6 > -+ (-1.44) Depth: 12/29 00:00:12 3350kN, tb=2385 >1...Kh3 2.Qf5+ Kh2 3.Qh5+ Kg2 4.Qg5+ Kf1 5.exf4 e3 6.Qh6 > -+ (-1.47) Depth: 13/31 00:00:21 6445kN, tb=5564 >1...Kh3! > -+ (-1.78) Depth: 14/34 00:00:38 12178kN, tb=10882 >1...Kh3! > -+ (-2.09) Depth: 15/35 00:01:20 28383kN, tb=25109 >1...Kh3 2.Qf5+ Kh2 3.Qh5+ Kg2 4.Qg5+ Kf1 5.Qb5+ Ke1 6.Qb1+ > -+ (-2.25) Depth: 15/36 00:02:26 54195kN, tb=43285 >1...Kh3 2.Qf5+ Kh2 3.Qh5+ Kg2 4.exf4 Qxf4+ 5.Ke6 e3 6.Qe2+ > -+ (-2.50) Depth: 16/37 00:05:19 121818kN, tb=103732 >1...Kh3 2.Qf5+ Kh2 3.Qh5+ Kg2 4.exf4 Qxf4+ 5.Ke6 e3 6.Qe2+ > -+ (-2.56) Depth: 17/39 00:14:13 336495kN, tb=257909
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