Author: Bertil Eklund
Date: 15:44:16 10/21/05
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On October 21, 2005 at 01:22:31, Kurt Utzinger wrote: >On October 20, 2005 at 18:17:49, Thomas Logan wrote: > >>On October 20, 2005 at 17:44:10, Bertil Eklund wrote: >> >>>On October 20, 2005 at 13:26:32, Thomas Logan wrote: >>> >>>>Anyone know how Shredders position learning works >>>> >>>>questions, wuestions, questions >>>> >>>>Is it updated every game ? >>>> >>>>Does it continue getting larger and larger ? >>>> >>>>Is it ever reset ? >>>> >>>>Is it opponent sensitive ? >>>> >>>>Tom >>> >>>I can´t answer your question but a few programs like Shredder and Nimzo for >>>example plays different in the same opening (after the book) and seldom repeats >>>the same moves even if it was a win (hash influence?). Occasitonaly I have seen >>>the same opening 3-4 times in the same match but Shredder or Nimzo often are the >>>first to pick another line. >>> >>>Bertil >> >>Hi >> >>I can say I have seen very little repeat positions in my own shredder fruit >>matches >> >>So book and and positions learning has not created repetitious games as some may >>have feared >> >>Tom > > > Hi Tom > We seldom use the engines own books in our tests. But > if we do, learning is usually deactived. And even then > it almost never happens that openings and moves are > repeated with the exception of Junior and The King. > In my opinion the influence of learning features is > much overestimated. > Regards > Kurt Hi, Kurt It was a problem in the early days, in example earlier Rebel versions could play the same losing line again and again but nowadays it is not a big problem. In fact I believe it was the SSDF that forced the programmers to use a big and varied book to take care of this problem. It really was a pain to manually play computers that played the same opening over and over again. I can´t underatand how we sat there and replayed game after game in order to expand the opening books. Bertil
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