Author: Gordon Rattray
Date: 05:56:18 10/23/01
Suppose that during the analysis of a position, a chess engine shows evaluations similar to this: depth 7: Qe1 eval: 0.58 depth 8: Qe1 eval: 0.42 depth 9: Qe1 eval: 0.39 depth 10: Qe1 eval: 0.33 i.e. as the depth increases, the move choice stays the same, and the evaluation is slowly but consistently decreasing. I release that in general the next evaluation could be anything, but I am right in thinking that the probability of it decreasing further is higher than normal? Or to take it to extremes, I think the above is more likely to decrease further than the following: depth 7: Qe1 eval: 0.33 depth 8: Qe1 eval: 0.39 depth 9: Qe1 eval: 0.42 depth 10: Qe1 eval: 0.58 Did each line involve a "fail low"? Or am I getting my terms mixed up? Do chess programs take account of the above and, e.g., are more likely to search further before moving? Gordon
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