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Subject: Re: Mate in 12 ....

Author: Paul Byrne

Date: 15:01:18 01/07/02

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On January 07, 2002 at 11:22:18, Robert Basham wrote:

>Extreme Chess takes 15 ply and 42 sec. to find
>1. Rh8+...! but then has trouble playing it out to the end...
>
>(The same kind of problem occurs with Hiarcs7 also)...
>
>[D]qn1rn1k1/2rp2N1/2b1p1K1/4Bp2/p7/1p6/2p5/7R w - -

G2K on an athlon 1200:

1W. mv=Bxc7 e=-2448 d=1 n=94 t=0.000
1W. mv=Rh8 e=-2300 d=2 n=1233 t=0.000
1W. mv=Nxe8 e=-2295 d=3 n=3006 t=0.000
1W. mv=Nxe8 e=0 d=4 n=5127 t=0.000
1W. mv=Nxe8 e=0 d=5 n=8896 t=0.000
1W. mv=Nxe8 e=0 d=6 n=19575 t=0.060
1W. mv=Nxe8 e=0 d=7 n=40682 t=0.060
1W. mv=Nxe8 e=0 d=8 n=73534 t=0.110
1W. mv=Nxe8 e=0 d=9 n=131434 t=0.220
1W. mv=Nxe8 e=0 d=10 n=451889 t=0.710
1W. mv=Rh8 e=9977 d=11 n=827452 t=1.370

If you try enough positions, eventually you get one that matches up
with your extensions properly.  :)

-paul



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