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Subject: Re: Problem 4 Computers 2 Solve

Author: Roy Eassa

Date: 13:15:28 01/24/02

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On January 24, 2002 at 16:06:01, Roy Eassa wrote:

>Aha, I see the position was posted incorrectly (checking the Chesscafe site).
>Try this one:
>
>[d] 8/4p1q1/1p1p4/1P3R2/P6k/8/8/4R2K w - - 0 1
>
>Now 1.Ree5!! wins.  And it's a very good puzzle.  Fritz 7 doesn't see it quickly
>on my Athlon 1.2.


1.Ree5!! dxe5 2.Rf2 Qg3 3.Rh2+ Kg4 4.Rg2 e4 5.Rxg3+ Kxg3 6.Kg1 Kf3 7.a5 bxa5
8.b6 e3 9.Kf1 +-

Fritz 7 does not see it in over 2.5 minutes on my Athlon 1.2 GHz.  However, when
I make the move manually, Fritz immediately sees that Black is lost.  Is this
due to null move pruning?



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