Author: Pham Hong Nguyen
Date: 11:06:00 02/09/04
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>There is a danger. You then mix perfect information with non-perfect >information. And inconsistent behavior is the result. IE if I probe everything >up to the q-search, but then only probe 3-4 piece tables, it is more than >possible that I pass over a drawn 5-piece ending, to reach a 4-piece ending I am >winning or losing. Comparing the scores then becomes a problem and alpha/beta >doesn't like doing that very well. It is bad enough to have some artificial >boundary beyond which you don't probe, as that allows for the classic horizon >effect where you push a capture off to beyond where you see that it loses or >draws according to the table, then you can make your plans accordingly, only to >realize in a couple of moves that you are committed to a path that you thought >was winning, but isn't. Adding another discontinuity only increases the chance >that such horizon effects happen. I see the danger. However, I think that is the matter of programing and setting parameters, do you think so? I love to see that Crafty is always the most advanced open source code and takes the highest titles again :) +Pham
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