Author: Dann Corbit
Date: 11:07:19 10/30/03
Go up one level in this thread
On October 30, 2003 at 12:10:35, jefkaan wrote: >On October 30, 2003 at 11:54:52, David H. McClain wrote: > >>I have personally played several games where I was ahead as much as + 3.08 and >>could do no better than a draw. A GM would have seen it but I cannot. > >well then there's something wrong with the engine (see >also my comments to Bob Hyatt); indeed i've seen sometimes >in endgames with unequal bishops the engine had +3 or so >but couldnt win, but they are rare, and with better >probing in the egtb's its getting even more rare. >Yet, a positional evaluation of an engine taking >into account such effects (fortresses, etc.) >could be very helpful; some engines are >better than others in this respect, its >not only a matter of search depth. >Some food for thought for programmers, maybe.. Every board evaluation is only an estimate, based on depth of search. That estimate can change radically with an additional ply. Just like a human player, the computer is only making an educated guess until it sees a forced outcome of win, draw, or loss. The only way to be truly sure of an outcome is when it is decided. For most chess game positions, the outcome is not going to be decided. So the computer can only make a guess. Most of the time, the computer guess will be better than ours.
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