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Subject: Re: Some hard test positions for computer programs

Author: Mark Young

Date: 03:17:06 02/27/99

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On February 26, 1999 at 07:41:57, blass uri wrote:

>I am interested in results of programs in these positions to decide which
>program to use in correspondence chess.
>
>I am interested to know the results of Hiarcs7 with selectivity 5,6 and 7.
>I want to know if selectivity 6 or 7 is realy better for correspondence games.
>
>These positions were posted here in the past.
>
>position number 1:
>r1bqr1k1/pp1p1ppp/5n2/1N2n3/2P1PB2/6P1/PP1Q1K1P/4RB1R b - - 0 1
>
>The right move is d6
>Ferret solved this position in more than 20 hours in pentium300
>It is a hard position for chess programs.
>
>position number 2:
>r2qr1k1/ppNb1ppp/3Q1n2/8/2P1PBn1/5KP1/PP5P/4RB1R b - - 0 1

Hiarcs7 was unable to find g4 after >8 hours of search. Both selc. 5, and 7 gave
to same line and results.

Here is Hiarcs7 PV for this position.
f6xe4 e1xe4 e8xe4 f3xe4 d7-c6+ e4-d4 d8xd6+ f4xd6 +54 selc. 5, and 7

Mark Young

>
>This position is a result of the first position after the moves 13...d6 14.Qxd6
>Bd7 15.Nc7 Neg4+ 16.Kf3
>The right move is g5 for example Bxg5 Nxh2+ and white has no advantage.
>
>position number 3:
>7r/1k2P2P/4p3/1pp5/8/2pp4/1n3PP1/R4K1R w - - 0 1
>
>The right move is g4 but programs(with the exception of exchess) usually prefer
>the losing move e8=Q
>
>The best reply to g4 is Nc4 (probably black is losing but Nc4 is the best
>chance) and programs usually have problems in finding Nc4.
>
>position number 4:
>r4rk1/2p3pp/p7/1p1pq3/8/2P2N2/PPQ2KPP/R1B5 w - - 0 1
>
>The task is to avoid Kg1
>Fritz5.16 can do it in something between 10 and 15 minutes
>I tries other program and they were slower.
>I do not know if Fritz5.32 is better than Fritz5.16 in this position.
>
>position number 5(the last position that I posted):
>3r1b1k/pp6/2n2q1p/2Bp1B1Q/5P2/1P4p1/P7/4R1K1 w - - 0 1
>
>The target is to find Re6
>All the programs that I tried(with the exception of chessmaster6000) need more
>than an hour to solve it on my pentium200MMX.
>
>Uri



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