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Subject: Re: Testposition: stalemate prevention; How many plies & nodes does it take?

Author: David Rasmussen

Date: 04:18:11 12/16/02

Go up one level in this thread

On December 16, 2002 at 06:22:26, Uri Blass wrote:

>>00:00:37.73 3967kn 14/26/27 +0.510 1. b4 Re4+ 2. Kd5 Rd4+
>>                                   3. Ke5 Re4+ 4. Kd6 Rd4+
>>                                   5. Ke6 Re4+ 6. Kf5 Rf4+
>>                                   7. Kg6 Rg4+ 8. Kf7 Rg7+
>>                                   9. Ke6 Rxc7 10. Kd5 Rb7
>>                                   11. Kc5 Re7
>
>Something seems wrong with the evaluation of chezzz here.
>It gives white a positive score even after white sacrifice the rook.
>


Mmm. Thanks for pointing it out. If I give Chezzz the position after
8... Rg7+, it chooses Kxg7 instantly with a 0.000 score (since it's stalemate).
If I give it the position after 9. Ke6, it instantly chooses
9... Rb7 with a Mate In 43 Ply score (Mate in 21, I guess). I will have to look
into that.

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