Author: José Antônio Fabiano Mendes
Date: 09:45:09 10/09/00
Go up one level in this thread
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:
>
>8/1p4kP/5pP1/3p4/8/4P3/7K/8 w - - bm e4; id "CCE4 479";
>8/1pp5/3k3p/PP6/2P2K2/8/8/8 b - - bm Kd7; id "CCE 491a";
>2k2K2/8/pp6/2p5/2P5/PP6/8/8 w - - bm a4; id "CCE4 530";
>8/pp3p2/8/6kp/8/3K1PP1/PP6/8 b - - bm f5; id "CCE4 608";
>8/pp2k1pp/2p5/2P1p3/2P1P2P/6P1/P7/2K5 b - - bm g5; id "CCE4 679";
>8/1p6/p1p5/P1Pp2pp/1P1P1p1k/5P1P/6PK/8 w - - bm g3 g4; id "CCE 680";
>8/1k6/p4p2/2p2P2/p1P2P2/2P5/P1K5/8 w - - bm Kc1; id "CCE 765";
>
>Some of these are pretty hard, some are easy, and some are in between. LambChop
>gets 4/7 in under 15min/pos of P133 time.
>
>The 5th position is cool, white threatens g4 to effectively lock the position
>hence the temporary pawn sac g5! is the only winning move for black.
>
>Would be interested to see how other programs do on these. I can give more
>details on the other positions if anyone is interested.
>
>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.
>
>cheers,
>Peter
Here is an interesting blocked-pawns ending that appeared
in "Chess",December 1975,page 38,under the label "The Christmas
Cracker",its author is given only as "Baker":
[D]3k4/3p4/3p4/p2P2p1/P2P2P1/3P4/3K4/8 w
The solution begins with the surprising move 1.Kd1!!
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