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Subject: Re: WAC #252 - Bg4

Author: Uri Blass

Date: 02:19:01 01/04/02

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On January 04, 2002 at 03:41:34, Steffen Jakob wrote:

>An another one: WAC #252:
>
>[D]1rb1r1k1/p1p2ppp/5n2/2pP4/5P2/2QB4/qNP3PP/2KRB2R b - -
>
>Here the key move is 1... Re2 which is surely the best move if you define "best
>move" as the move which wins and leads to the shortest mate (it's a mate in 5).
>Hossa (version of today) needs 19.73 seconds to play 1... Re2. Before he prefers
>1... Bg4 which also seems to win. So if you only look for winning move then this
>position should be counted as solved in short depths, too. How do others handle
>such cases?

My program needs 8.282 seconds on p800
to play Re2

I am surprised that my program find Re2 faster than your program
because I did almost nothing about improving the search rules
and my search rules for today are similiar to tscp search rules

My program likes Bg4 at depth 5 but at depth 6 changes it's mind
twice when the first time is changing it's mind from Bg4 to
Nxd5 when the score goes up from 1.1 to 1.3 and
the second time it changes it's mind from Nxd5 to Re2
Score goes up from 1.3 to 4.86 when depth 7
is enough to see mate in 5.

Uri



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