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Subject: Re: Erm... dodgy EPD tests

Author: Colin Frayn

Date: 11:55:29 04/29/00

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>>Am I (and both programs) missing something clever, or are the best moves that
>>are given here both wrong?
>>
>
>>[D]6k1/7p/5P1K/8/8/8/7P/8 w - -
>>
>>Suggested best move : Kh5
>>ColChess prefers : Kg5 (Spots at 20 ply that it's won)
>
>Kg5 is the correct move  It is a mate in 18 counting that move.  Kh5 is a
>draw.  The position is wrong, or the best move is wrong.

OK thanks a lot for that info Bob.  That makes me feel a lot better about my
endgame analysis routines.  I'll change the EPD data now.  *grin*

>>[D]4k3/4Pp2/5P2/4K3/8/8/8/8 w - -
>>
>>Suggested best move : Kf4
>>ColChess prefers : Kf5 (gives mate in 14 after 3 minutes' thinking, and at depth
>>of 22 ply)
>>
>
>This one is ok.  Kf5 is a mate in 13.  Kf4 is also a mate in 13.

Oh OK.  ColChess changed its mind to a mate in 13 as I played through the PV, so
I'd tend to agree with that one.

I suppose anyone with tablebases would easily get those two without any
problems.  I'm assuming that you didn't actually _calculate_ that mate in 18? :)

Cheers,
Col



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