Author: Uri Blass
Date: 14:38:58 11/21/00
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On November 21, 2000 at 14:48:25, Robert Hyatt wrote: >On November 21, 2000 at 14:32:51, ERIQ wrote: > >>or is either better ?? your thoughts. >> >>I was thinking about buying yet another program for analyses of games. >>Though I like chess tigers playing ablity I wonder it fritz with it's >>backward way of doing it and ability to add eval's like (!,!?)automaticaly >>would be better for just looking at game scores. > > >I don't like back to front. It requires that stuff from the end of the >game be back-filled through the hash table. Here are the two arguments: > >1. back to front is better... because you can use stuff happening at the end >of the game to influence scores and moves earlier in the game. > >2. front to back is better because it gives a true reflection of what the >computer would have seen had _it_ been playing that game directly. > >I go along with 2. 1 means you see some bad things quicker than if you use >2. But it also means that when the critical hash entries get overwritten, >the scores jump up significantly, which is also misleading. I think that the way of learning is not optimal for analysis. When I analyze a position I want an intelligent program to learn from the tree that I generate in the same way that I can do it. When I have one forced line there is no problem but my experience is that when there is a tree of 2 lines of some moves I can get the following behaviour. 1)I analyze line A with a chess program and go back amd the program understand that line A is not good and prefer line B. 2)I analyze line B with the program for a long time and go back. The program understand that line B is not good but instead of prefering line C it prefers again line A because it forgot that line A is not good. I think that it is better not to forget only the positions in the tree that I generated with the evaluations of them after search and to forget all the other stuff. The tree that I generate is not too big to remember and the problem is that the programs that I use do not understand that it is the important tree to learn from it. Uri
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