Author: Uri Blass
Date: 04:14:42 08/30/02
Go up one level in this thread
On August 30, 2002 at 07:12:29, Uri Blass wrote: <snipped> >I said only when there is a big difference. >I do not expect a big difference against the side to move at small plies when >there is no zugzwang. > >I already found the relevant position that Fritz blundered because of the fact >that they used super aggresive null move pruning > >You can see that the right move is in the pv but Fritz did not anlayze it >because it threats nothing. > >The move failed low every iteration until Fritz found another move that does not >win. > >I avoid null move in pv lines and every other program that I know does it but >Fritz does not care about it. > >Deep Fritz default: >Luba kristol - Uri blass [D]1n6/1P6/8/2P5/p3kp1p/6p1/1P4K1/4N3 b - - 0 1 > >Analysis by Deep Fritz: > >54...a3-- > ³ (-0.31) Depth: 1/3 00:00:00 >54...a3-- > ³ (-0.31) Depth: 1/3 00:00:00 >54...f3+! > ³ (-0.38) Depth: 1/3 00:00:00 >54...h3+! > ³ (-0.50) Depth: 1/3 00:00:00 >54...h3+! 55.Kxh3 > µ (-0.91) Depth: 1/3 00:00:00 >54...Nc6! > -+ (-1.69) Depth: 1/3 00:00:00 >54...Nc6! > -+ (-2.13) Depth: 1/3 00:00:00 >54...Nc6-- > -+ (-1.81) Depth: 2/4 00:00:00 >54...Nc6-- > -+ (-1.81) Depth: 2/4 00:00:00 >54...Kd4! > -+ (-2.09) Depth: 2/6 00:00:00 >54...Kd4! 55.Nf3+ > -+ (-2.22) Depth: 2/6 00:00:00 >54...Kd4 55.Nf3+ Kxc5 56.Nxh4 > -+ (-2.22) Depth: 3/8 00:00:00 >54...Kd4 55.Nf3+ Kxc5 56.Nxh4 Kd5 > -+ (-2.22) Depth: 4/10 00:00:00 >54...Kd4 55.Nf3+ Kxc5 56.Nxh4 Kc6 57.Ng6 > -+ (-1.97) Depth: 5/11 00:00:00 >54...Kd4-- > -+ (-1.66) Depth: 6/12 00:00:00 2kN >54...Kd4-- 55.Nf3+ Kxc5 56.Nxh4 Kc6 57.Ng6 Kxb7 > -+ (-1.47) Depth: 6/13 00:00:00 2kN >54...Kd5! > -+ (-1.50) Depth: 6/13 00:00:00 2kN >54...Kd5! 55.Nd3 Kd4 56.Nxf4 Kxc5 57.Ne6+ Kd6 > -+ (-1.75) Depth: 6/13 00:00:00 3kN >54...Nc6! > -+ (-1.78) Depth: 6/13 00:00:00 4kN >54...Nc6! 55.Kh3 f3 56.Nxf3 > -+ (-2.13) Depth: 6/13 00:00:00 6kN >54...Nc6 55.Kh3 f3 56.Nxf3 Kxf3 57.Kxh4 g2 > -+ (-2.41) Depth: 7/15 00:00:00 8kN >54...Nc6-- > -+ (-2.09) Depth: 8/10 00:00:00 10kN >54...Nc6-- > -+ (-2.09) Depth: 8/18 00:00:00 12kN >54...Nc6! > -+ (-2.41) Depth: 9/17 00:00:00 28kN >54...Nc6-- > -+ (-2.09) Depth: 10/14 00:00:00 37kN >54...Nc6-- > -+ (-2.09) Depth: 10/19 00:00:00 45kN >54...Nc6! > -+ (-2.41) Depth: 11/20 00:00:00 87kN >54...Nc6-- > -+ (-2.09) Depth: 12/21 00:00:00 128kN >54...Nc6-- > -+ (-2.09) Depth: 12/24 00:00:00 173kN >54...Nc6-- > -+ (-1.78) Depth: 13/21 00:00:00 261kN >54...Nc6-- > -+ (-1.78) Depth: 13/26 00:00:00 378kN >54...Nc6-- > -+ (-1.47) Depth: 14/24 00:00:01 660kN >54...Nc6-- > -+ (-1.47) Depth: 14/28 00:00:01 922kN >54...Nc6-- > µ (-1.16) Depth: 15/27 00:00:02 1600kN >54...Nc6-- > µ (-1.16) Depth: 15/30 00:00:03 2191kN >54...Nc6-- > µ (-0.84) Depth: 16/29 00:00:05 3412kN >54...Nc6-- > µ (-0.84) Depth: 16/30 00:00:06 4682kN >54...Ke3! > µ (-0.88) Depth: 16/35 00:00:11 8378kN >54...Ke3! 55.Nc2+ Kd3 56.c6 Nxc6 57.Nb4+ Ke2 58.Nxc6 f3+ 59.Kh3 f2 60.b8Q > µ (-0.97) Depth: 16/39 00:00:14 9888kN, tb=1 >54...Ke3 55.Nc2+ Kd3 56.c6 Nxc6 57.Nb4+ Ke2 58.Nxc6 f3+ 59.Kh3 f2 60.b8Q > µ (-0.88) Depth: 17/37 00:00:24 17729kN, tb=7 >54...Ke3 55.Nc2+ Kd3 56.c6 Nxc6 57.Nb4+ Ke2 58.Nxc6 f3+ 59.Kh3 f2 60.b8Q > µ (-1.13) Depth: 18/40 00:01:14 55000kN, tb=72 > >(blass, tel-aviv 30.08.2002) Note that with selectivity=0 Fritz has no problems. Uri
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