Author: Robert Hyatt
Date: 11:01:28 07/19/04
Go up one level in this thread
On July 19, 2004 at 12:44:04, Uri Blass wrote: >Crafty has antisymmetric evaluation so how can it learn from white about black? First, there is really minimal asymmetry today. But, regardless, for positional learning, this really only applies to the same side for the _same_ opening. The idea is to avoid repeating the same game. This really won't carry over from white to black because it is _hightly_ unlikely that Crafty would play the same opening for both sides... > >I learned from the winboard forum that Crafty can learn from a game that it lost >with white about moves to play in black. > >When does it learn to do it?(only if the relevant position is one ply after it's >move or also later) and how it goes with Crafty antisimmetric evaluation. When the score drops significantly, crafty "learns" the position and score. If the same game is played again, it will use this to change the move earlier in the game and avoid that big score drop the second time around. > >Suppose that Crafty is white and the opponent chose to close the position with >black and won the game and Crafty had negative score against itself because it >dislike closed positions. > >Does it mean that in future game when Crafty is black it is going to learn that >the line of the opponent was good based on it's score and it is going to close >the position. > You are mixing book learning with position learning. Position learning is not done while in book, ever. >Uri
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