Author: Amir Ban
Date: 14:23:13 01/19/00
Go up one level in this thread
On January 19, 2000 at 13:01:19, Christophe Theron wrote: >On January 18, 2000 at 16:35:35, Dave Gomboc wrote: > >>On January 18, 2000 at 16:30:15, Christophe Theron wrote: >> >>>On January 18, 2000 at 10:32:51, Enrique Irazoqui wrote: >>> >>>>I noticed that sometimes Tiger keeps playing the same losing opening lines. In >>>>the match Tiger-Hiarcs, games 6 and 10 are D10 openings, identical until 14... >>>>e6, where Hiarcs shows an evaluation of 0.82 from its point of view. Tiger lost >>>>them both. Games 17 and 19 were A45 lines that immediately out of book Hiarcs >>>>evaluated as 0.57 in its favor. Again, Tiger lost both games. It seems that >>>>there is a learner problem that will allow Tiger to play repeatedly the same >>>>losing lines. >>> >>> >>>You are right Enrique. This is not a bug, I would rather call it a design flaw. >>> >>>I have written a simple learning algorithm because I did not want to invest too >>>much time in it. In fact I had almost no time to invest, so I have done my best >>>in a very tight schedule. >>> >>>My philosophy has always been to put my efforts on the real stuff: the engine >>>itself. >>> >>>But I'll have to work harder on the learning system, because as you have heard >>>recently, Junior6 is badly taking advantage of this (I have heard it has >>>repeated TWELVE TIMES the same won opening in one of the SSDF matches). :( >>> >>> >>> Christophe >> >>Looks like you'll be doing some comp-comp testing in the future. Welcome to the >>Core Wars saga. >> >>Dave > > >Not necessarily. All I need is a learning algorithm that really knows how to >avoid playing the same lost game twice, and maybe tries from time to time to >replay a won game. That does not imply I'm going to buy 10 computers and let >them play auto232 matches all day. > >Anyway I don't have enough money for that. > > > Christophe The easiest defense against learners is to put a random element in your search engine. If you think about it, that's not very different from what a wide book would do for you. I think this can solve about 80% of the problem. The 100% solution is to have a good book and a good learner. Amir
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