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Subject: Re: Pawn endgame test suite

Author: Dieter Buerssner

Date: 07:38:07 10/07/00

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On October 07, 2000 at 04:31:09, Peter McKenzie wrote:

>I've been browsing 'Comprehensive Chess Endings, Pawn Endings' by Averbakh &
>Maiselis, picking out a few interesting looking positions to test my program
>with.  Here is the little test suite I came up with:

I put in the solution times of Yace, AMD K6-2 475, 10M hash. 4-men +kppkp TBs
First number is with TBs, second without.

>8/1p4kP/5pP1/3p4/8/4P3/7K/8 w - - bm e4; id "CCE4 479";

37 s / 49 s

>8/1pp5/3k3p/PP6/2P2K2/8/8/8 b - - bm Kd7; id "CCE 491a";

11 s / 170 s

>2k2K2/8/pp6/2p5/2P5/PP6/8/8 w - - bm a4; id "CCE4 530";

not found in 15 min

>8/pp3p2/8/6kp/8/3K1PP1/PP6/8 b - - bm f5; id "CCE4 608";

1 s / 1 s

>8/pp2k1pp/2p5/2P1p3/2P1P2P/6P1/P7/2K5 b - - bm g5; id "CCE4 679";

5 s / 5 s

>8/1p6/p1p5/P1Pp2pp/1P1P1p1k/5P1P/6PK/8 w - - bm g3 g4; id "CCE 680";

< 1 s / < 1 s

>8/1k6/p4p2/2p2P2/p1P2P2/2P5/P1K5/8 w - - bm Kc1; id "CCE 765";

not found in 15 min

>Would be interested to see how other programs do on these.  I can give more
>details on the other positions if anyone is interested.

I would be very intersted, especially in position 5 and 7. In the later I get
exactly the same score for all moves ...

>Not sure how much tablebases will help on these positions, I'd expect them to
>help alot on the 2nd position but not so much on the rest.

I think the same.

Are there any other recomendable test suites for endgames? I am aware of
one that is downloadable from Steffen "Hossa" Jakob's site.
I would be espescially interested in problems with description of the solution.

Regards,
Dieter



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