Author: Robert Hyatt
Date: 09:52:01 06/18/01
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On June 18, 2001 at 08:28:08, Bas Hamstra wrote: >On June 17, 2001 at 01:09:50, Robert Hyatt wrote: > >>On June 16, 2001 at 22:59:06, Vincent Diepeveen wrote: >> >>>Hello, >>> >>>From Gian-Carlo i received tonight a cool version of crafty 18.10, >>>namely a modified version of crafty. The modification was that it >>>is using a small sense of Singular extensions, using a 'moreland' >>>implementation. >>> >> >> >>Instead of modifying Crafty to simulate Deep Blue, why didn't you >>modify Netscape? Or anything else? I don't see _any_ point in >>taking a very fishy version of crafty and trying to conclude _anything_ >>about deep blue from it... >> >>Unless you are into counting chickens to forecast weather, or something >>else... > >I don't agree here. It is fun. Maybe not extremely accurate, but it says >*something* about the efficiency of their search, which I believe is horrible. I >think using SE and not nullmove is *inefficient* as compared to nullmove. We >don't need 100.0000% accurate data when it's obviously an order of magnitude >more inefficient. > I don't think there is any proof to back up that statement. IE who says that using SE + null-move is better than using just SE? Who has tried this besides Hsu? And before someone runs off and tries it, notice that any serious change like that is going to take a year of tuning to make it work well. IE mtd(f) is a good example. Several have spent a couple of days trying it and said "no good." I spent 6 months fiddling with it and _still_ had a ways to go to make it work reasonably well. Took me way longer than that to get bitmaps to work as they are right now. So saying SE without null-move is "ineffecient" is too vague without a lot of data. DT/DB obviously played quite well against computers, and they obviously had something that worked very well. >By the way at FICS a modified Crafty is running, using SE. It has a rating of >2100. That could mean anything on FICS. Such a large number of cheaters. And Crafty plays differently when it is facing a computer or a human opponent. And of course I have never gotten a SE version that I would consider "satisfactory" yet, although I fiddle with it from time to time. > >Best regards, >Bas.
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