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Subject: Re: KR against KQ is draw without tablebases

Author: Robert Hyatt

Date: 11:55:16 01/27/03

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On January 27, 2003 at 12:35:50, Georg Langrath wrote:

>I tried to let Chessmaster 9000 play against itself in endgame KRKQ. The side
>KR with tablebases and the side  KQ without. KQ-side wasn’t nearer checkmate in
>move 50 than in move 1, even with 3 minutes per move.  It is rather amusing to
>look at. I think that it is impossible for a computer to solve without special
>knowledge or tablebases as in the case KBNK.
>Georg


Then chessmaster has a problem.  I'd be happy to play you with Crafty using no
tables, with the KQ side, against a program using the tables with the KR side.
I
ran this test about a hundred times a few years ago when Amir first reported
that
Junior could win KQ vs KR without tables.  I didn't believe it, but found that
it
was not only true, but trivially true.  I managed to win with only one second of
computing per move.  I can run some tests and post the pgn if you want...

• No problem for Crafty to checkmate KQ against KR without tablebases Georg Langrath 12:46:37 01/27/03

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