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Subject: Re: Test position GMG3 #13 - chess rules

Author: Steffen Jakob

Date: 10:21:17 09/26/00

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On September 26, 2000 at 12:29:04, Bruce Moreland wrote:

>On September 26, 2000 at 11:25:03, Steffen Jakob wrote:
>
>>[D]8/6k1/p5P1/1p5K/1P6/8/8/8 b
>>
>>Here Hossa continued with 5... Kf6 which is indeed losing. All moves seem to be
>>losing here. But when I forced 5... b5 6. bxa5 Hossa gave a score of mate in 54!
>>
>>How is this such a position handled in tournament chess? Is this a draw (I think
>>the rules have changed here several times?!)? If it's a draw then I will change
>>my tablebase probe code to return a draw score if the mate distance is > 50.
>
>You mean 5. ... a5, which goes into a QP vs Q ending.  As was pointed out in
>another post, your example is probably moot here since the pawn gets to move and
>resets the counter, but even if it doesn't, you can ignore this case.
>
>We currently have DTM tables, and you you assume that DTM > 50 is a draw you'll
>get worse results than if you leave it alone.  You'll play into positions where
>your opponent can convert in under 50 moves, and against humans you'll avoid
>endings that they will mess up.

Yes, but it would be nice to have tables where a draw score is stored if the
conversion is not possible. I assume that those tables would be harder to
create.

Greetings,
Steffen.



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