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Subject: Re: Which program can solve position from Nisipeanu-Khalifman?

Author: Jeremiah Penery

Date: 06:10:40 10/12/99

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On October 12, 1999 at 08:47:57, Bernhard Bauer wrote:

>Hallo,
>
>       +---+---+---+---+---+---+---+---+
>    8  |   |   |   |   |   |   | *K|   |
>       +---+---+---+---+---+---+---+---+
>    7  |   | R |   |   |   |   |   |   |
>       +---+---+---+---+---+---+---+---+
>    6  |   |   |   |   |   |   | P | *P|
>       +---+---+---+---+---+---+---+---+
>    5  |   |   |   | *R| *B| *P|   | P |
>       +---+---+---+---+---+---+---+---+
>    4  |   | P |   |   |   | B |   |   |
>       +---+---+---+---+---+---+---+---+
>    3  |   |   |   |   |   |   | K |   |
>       +---+---+---+---+---+---+---+---+
>    2  |   |   |   |   |   |   |   |   |
>       +---+---+---+---+---+---+---+---+
>    1  |   |   |   |   |   |   |   |   |
>       +---+---+---+---+---+---+---+---+
>         a   b   c   d   e   f   g   h
>FEN: 6k/1R/6Pp/3rbp1P/1P3B/6K/8/8 w
>
>this is a position from Nisipeanu vs. Khalifman, Las Vegas, tie-break, game 2.
>
>Question: which program can solve this position?
>IMHO no program can do, but who knows, so I ask.
>G. Kasparov calls it a mutual Zugzvang position and in the variant he gives the
>white rook is hold in prison.
>The best move G. K. gives is Kf3 !!

I assume this move wins for white?  What is the variation?

Just getting Kf3, my modified Crafty 16.18 does this in 1:46 (less than 2
minutes) at ply 13.  This is the variation at ply 14 and 2 1/2 minutes:

14     2:34   6.12   1. Kf3 Bxf4 2. Kxf4 Rd1 3. Kxf5 Rf1+
                     4. Ke6 Re1+ 5. Kf6 Rf1+ 6. Ke7 Re1+
                     7. Kd6 Rd1+ 8. Ke5 Re1+ 9. Kd5 Rd1+
                     10. Kc5 Rc1+ 11. Kd4 Rd1+ 12. Ke4 Kf8

I'll let it run all of today and see what happens.

Jeremiah



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