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Subject: Diagram + Solution + Comments

Author: Gian-Carlo Pascutto

Date: 06:51:20 12/27/00

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On December 27, 2000 at 09:24:18, Åge Trulssen wrote:

>White:Ka3, Nc8, g5  Black:Kg8, g7, e3
>White to move and get a draw
>
>      Å.T.

[D]2N3k1/6p1/8/6P1/8/K3p3/8/8 w

Ne7+ Kh7 g6+ Kh8 Kb4 e2 Kc5 e1=Q Kd6 draw

[D]7k/4N1p1/3K2P1/8/8/8/8/4q3 b

Black cannot win white's knight because his king is trapped.

Crafty finds this very fast but will not realize it is a draw.
I don't think any program will, unless it has a heuristic that
says 'must make progress if ahead'. Or you have 6 man tablebases. (or maybe
5 too...I don't have those). Maybe if you can see the 50move rule
you can see the draw too.

Just by watching at the PV it spits out it's obvious that it's
a draw:

depth=29 -5.93 5. ... Qe4 6. Kd7 Qe5 7. Ke8 Qd4 8. Kf7 Qc4+ 9. Ke8 Qe6 10. Kf8
Qf6+ 11. Ke8 Qd6 12. Kf8 Qa6 13. Kf7 Qa2+ 14. Ke8 Qa4+ 15. Kf7 Qb3+ 16. Ke8 Qd3
17. Kf7 Qd1 18. Ke8 Qg1 19. Kf7 Qe1 20. Kf8 Qe4 21. Kf7 Qf4+ 22. Ke8 Qe4

--
GCP



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