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Subject: Re: A position recently posted... what is the real answer? Very compelling..

Author: Dann Corbit

Date: 15:17:35 09/13/99

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That is a fascinating problem.  I intend to pour over the output until I
completely understand it.

Crafty never did pick the key move, but did stop assuming that the offered rook
would be taken:
8/8/8/1k3p2/p1p1pPp1/PpPpP1Pp/1P1P3P/QNK2NRR w - - acd 27; ce 2283; pv Rg2 Kc6
Kd1 Kd6 Ke1 Kc6 Re2 Kd6 Kf2 Kc6 Rg1 Kd5 Ke1 Kd6;

CHEST did not find any mate through 16 fullmoves, and hit the wall trying to
calculate 17 fullmoves. [Something powerfully exponential must happen at that
point, since it pounded through 16 moves in a short time, and failed to complete
17 moves over an entire weekend.]

The assessment that computers will never solve this sort of thing is probably an
exaggeration, but *currently* it appears to be beyond the limits of what a PC
can do (at least).



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