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Subject: Re: Solver : What is the fastest chess problem solver

Author: Uri Blass

Date: 21:12:37 04/22/03

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On April 22, 2003 at 15:21:24, phili_ppe wrote:

>Thanks Manfred !
>Chest for UCI is fast.
> Here's a position (FEN)
>
>8/1Q6/3r4/p7/P5N1/5NPp/2K2Ppr/6bk w - - 0 1
>
>mate in 11
>
>
>first move is 1.Qb3 !
>
>if 1.Qe4? then 1... Rb6 !

Rb6 does not help.
>
>Chest says mate in 10 with Qe4, but there is the refutation above.

No there is no refutation for Qe4 and it was verified also by yace.

>Apart from that it's very good :)

Chest (p850,64 Mbytes hash) says

New game
8/1Q6/3r4/p7/P5N1/5NPp/2K2Ppr/6bk w - - 0 1

Analysis by ChestUCI Ver.2.3:

1.Qe4 Rb6 2.Nxg1 Rb4 3.Qe6 Rxg4 4.Qxg4 Kxg1 5.Qe2 Rh1 6.g4 Kh2 7.Qe5+ Kg1 8.Kd2
Kxf2 9.Qe3+ Kf1 10.Qe1#
  +-  (#10)   Depth: 10   06:24:25

(, eim 23.04.2003)

Uri



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