Author: Larry Proffer
Date: 08:57:07 05/08/01
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On May 08, 2001 at 11:43:29, Uri Blass wrote: >On May 08, 2001 at 10:58:01, Larry Proffer wrote: > >> >>Thank you for your reply. I concur. >> >>What we do know is that Fritz and Junior are, to all intents and purposes >>'equal', or very nearly 'equal'. >> >>If we need to find a winner, it makes *no* difference how many games we play. >> >>If we play one game, Fritz has a 50% chance, Junior a 50% chance. >> >>If we play one thousand games, Fritz has a 50% chance and Junior has a 50% >>chance. >> >>Number of games is not relevant when they are so closely matched. > >I guess that the number of games is relevant and if the number of games is >bigger the better learner is going to win and it means probably that Fritz is >going to win after many games because Fritz has a bigger book so it is more easy >for it to learn to go for lines that the opponent does not understand. > >Uri 1. This, of course, opens up a lot of questions as to why machines were switched after a few games. This would have killed Fritz's learn files. It is known that 'book-learning' can have bad effects, particularly after a string of losses. The effect can be to push the program away from its usual openings into even worse areas of the book. The desire, of course, is to hope that it gets pushed away from the losses towards soemthign less bad, but, in practice, it can be pushed into even worse regions from which there is no escape. Books are so large, and the pathways produced by learning so unpredictable, that this effect is quite common. So another question is why carry out a machine switch whose effect would have been to kill the learnt data? 2. We know about learning in computer chess. Would you tell us if it (comp-comp learning) has any relevance at all in 'finding the best opponent for Kramnik'. Doesn't the luck involved with this bi-program learning process (remember, the learning pathways are almost infinite - we don't know where they lead, and they may make things worse) just add to the general fact that Fritz still has 50% chance, and Junior still has 50% chance?
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