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Subject: Re: cut'n'paste error

Author: Andrew Dados

Date: 00:44:58 08/14/00

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On August 14, 2000 at 03:41:29, Andrew Dados wrote:

>On August 13, 2000 at 16:47:33, Ed Schröder wrote:
>
>>On August 13, 2000 at 05:23:42, Colin Frayn wrote:
>>
>>>On August 13, 2000 at 05:17:29, Colin Frayn wrote:
>>>
>>>>Take this position for example;
>>>>
>>>>[D]4Q3/2p3p1/7p/p1k1B3/2p1P2P/2P3P1/1r2q3/6K1 w - -
>>>>
>>>>which ColChess searches *fully* to depth 13 ply in just over 3 seconds on my
>>>>p3-450.  It is a mate in 9.  Crafty sees the mate quite early because of its
>>>>advanced extensions, but after 30 seconds had still only just reached 11 ply in
>>>>its search.  There are probably better examples where Crafty can't see the mate,
>>>>and I unfortunately can't remember the board setup before this position, which I
>>>>know to be one of them.
>>>
>>>OK I found the game.  This is one position.  Unfortunately Crafty again sees the
>>>mate using its impressive extension code, but ColChess manages to search 18 full
>>>ply *completely* plus seeing the mate immediately at 19 ply in 46.7 seconds.
>>>After this time, Crafty has just started searching the 13th ply.  See how Faile
>>>does.
>>>
>>>[D]6Q1/2p3p1/5k1p/p3n3/2pBP2P/2P3P1/1r2q3/6K1 w - -
>>>
>>>Qf8+ is mate in 12.
>>>
>>>Cheers,
>>>Col
>>
>>There are other (cheap) ways. Rebel handles these cases in Q-search.
>>
>>00:00:00  04.00  Mate in 12 moves  1.Qf8+ Ke6 2.Qe8+ Kd6 3.Bxe5+ Kc5
>>
>>Ed
>
>To be picky... my program says mate in 8.

Ohhh... forget it - wrong fen...

-Andrew-



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