From: Jean-loup Gailly <[email protected]> To: [email protected] Sent: Sun, July 3, 2011 9:12:59 AM Subject: Re: [Computer-go] MCTS and perfect endgame
Leon, > One of problems (which I tested with gogui, thankyou very much) > was losing points in endgame when program is winning. This is by design. Pachi maximises the chance of winning, not the number of points. But if you want Pachi to win by more points while increasing the risk of losing, you can simply increase the parameter val_scale. See the description in uct/uct.c: "How much of the game result value should be influenced by win size. Zero means it isn't". The default value is 0.04, which is the result of tuning. (If you increase val_scale above this it starts losing more.) Why should this value be static? Shouldn't the behavior change when there is a certain win?
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