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Subject: Re: Free Nimzo98 update available!

Author: Ernst Walet

Date: 02:40:36 04/06/98

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On April 06, 1998 at 05:11:29, Jouni Uski wrote:

>At http://www.computerchess.com/nimzo/news.html#fix.
>It's dated 16.3.1998.

Last weekend I had the opportunity to test the updated Nimzo98 and it
crashed between 5 minutes and half a hour on a p133, 40MB hash while
analyzing the following position:

2r4r/1pq1kp1p/p1b1pp1Q/n7/3NP3/2P5/P3BPPP/3R1RK1 w

This position is from the Polgar-Shirov game at Hoogovens, 1998, and the
key move is e4e5. (this was not found by Nimzo98, btw)

Engine settings (by head):

Mobility midgame: 16
Mobility endgame: 4
X-ray midgame: 2
X-ray endgame: 1

Extension table all at 16

Extension threat: 1
Extension capture: 1
Extension passed pawn: 2

Value pawn: 100
Value Knight: 300
Value Bishop: 300
Value Rook: 500
Value Queen: 900

I could repeat the crash several times.  I'm don't know if the original
(unupdated) Nimzo98 crashes on the same position, but it does on another
and that was one of the reasons this fix was released.

Kind regards, Ernst.



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