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Subject: Re: Grigoriev challenge position

Author: Roy Eassa

Date: 11:32:28 09/28/01

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On September 28, 2001 at 14:27:32, Simon Finn wrote:

>On September 28, 2001 at 12:36:55, Dieter Buerssner wrote:
>
>[snip]
>
>>I think, often in this type of positions (only few pawns), chess programs are
>>usually very good. There are only few pawn moves possible, and programs reach a
>>high search depth fast, and of course, because of the TBs. Without TBs I get:
>
>I would be very impressed if any program can solve the following
>innocent-looking position (Grigoriev 1933) in a reasonable time. By "solve" I
>mean find most of the PV (up to 13. Ka8, say) with a winning score.
>
>[D]k7/8/pp6/2p4K/8/PPP5/8/8 w - - bm c4;c0 "Grigoriev 1933";pv "1. c4 Kb7 2. a4
>Kc6 3. Kg5 Kc7 4. Kf6 Kd7 5. a5 Kd6 6. Kf5 Kc7 7. Ke6 Kc6 8.  Ke7 Kc7 9. Ke8 Kf8
>10. axb6 Kb7 11. Kd7 Kxb6 12. Kc8 Kb6 13. Ka8 a5 14. Kb8 a4 15. bxa4 Ka5 16. Kb7
>Kxa4 17. Kc6 Kb4 18. Kd5";
>
>Pawn endings are difficult!
>


Are there any words that go along with this to explain why each is the best
move, and what happens on other plausible lines?



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