Author: Dave Gomboc
Date: 19:41:32 02/04/00
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On February 04, 2000 at 08:40:07, Robert Hyatt wrote: >On February 04, 2000 at 03:51:34, Dave Gomboc wrote: > >>On February 04, 2000 at 00:02:09, Robert Hyatt wrote: >> >>>Interesting that it takes the best player in the world 45 minutes, a strong >>>GM 24 hours, and a computer only 60 seconds _total_. >>>Perhaps the computers just excel at this kind of position since they can reach >>>extreme depths quickly... >>> >>>Note that I did run them with tablebases... >> >>60 seconds didn't get all the correct scores, though... which means some >>critical moves were not found in the search. >> >>Dave > > >We have to define 'right move for the right reason'. IE in position 1, I get >mate instantly. Did kasparov see the mate? I doubt it. Was he therefore wrong >since he found the right move, but didn't see the totally winning line? No. > >My philosophy here is that I would rather (a) find the right move by 'intuition' >and then refute it with a deep search when it is wrong; rather than (b) find an >ugly move by 'intuition' and then only find the right move by a deep search. In >the positions given, Crafty likes the correct move from the first search until >the last one. And no doubt the score will continue to rise. The only position >that gives it problems is the last one, which takes 30 seconds to hit the right >move. If I have time, I will run them all at 10 minutes and 1 hour per >position, which ought to find the winning move and score, easily. > >But I feel much better intuiting the right move based on evaluation, and having >the search confirm it later, rather than depending on the search to find the >right move and overrule the evaluation. When it may well not have time to find >the right move via search, ever... Sure, but what I'm saying is that finding the right move via intuition is significantly different from finding the right line of play via intuition. These problems are tough, and one move is exactly that: a step in the right direction. Dave
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