On Mon, 2008-11-17 at 13:17 -0200, Mark Boon wrote: > > 1- Capture a stone in atari with a certain probability (like David > Fotland says he's doing). > 2- Forbid playing on the 1st or 2nd line unless there's a stone > within manhatten-distance 2. > 3- Forbid putting yourself into atari with a large number (>6) of > stones.
Hi Mark, I'm still working on improving the refbot and I'm using the Michael Williams modification too. Many of the things I've tried don't directly affect the playouts. One of them you can try is this: 1. Do not play to any edge point unless a stone (of either color) is diagonally or orthogonally adjacent. I think that is a good practical rule. It's not a perfect rule, in the sense that such a move could still be best - but I think for a playout strategy it is good. For a practical player you should veto that move as a root move choice too, because the rule will severely reduce the number of samples for the edge points and bias them towards wanting to be played, the opposite of what you want. In fact, that has to be considered for anything you do. You must distinguish between using a rule to adjust the playout strategy and actually using the scores of the moves for this or that. Some UCT implementation try to use AMAF data to shape the tree and you could get into trouble if you are not careful. - Don
signature.asc
Description: This is a digitally signed message part
_______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
