Thanks for your answer. Unfortunately Pachi doesn't seem to really try to maximize score, even with these settings: Once one side has won by a large enough margin, it will stop trying to kill small groups and I am precisely trying to generate a database to learn about life and death. Perhaps I can play around with the settings in uct/dynkomi.c to see if I can make it behave closer to what I need.
If anyone knows of a program that can actually use something like expected score in the UCT move selection formula, that's probably what I need. I might end up modifying Pachi to do this, but it sounds daunting. Álvaro. On Tue, Nov 17, 2015 at 5:26 AM, Josef Moudrik <j.moud...@gmail.com> wrote: > I am trying to create a database of games to do some machine-learning >> experiments. My requirements are: >> * that all games be played by the same strong engine on both sides, >> * that all games be played to the bitter end (so everything on the board >> is alive at the end), and >> * that both sides play trying to maximize score, not winning probability. >> >> This last requirement is a bit unusual. Ideally I would like to do this >> on 9x9 first (to be able to try many things quickly) and then 19x19 (the >> real thing). >> >> Is there a strong engine that would allow me to do this? Linux or Mac >> strongly preferred. I'll be happy to pay for it if it's commercial. >> > > Hello, > > pachi ( pachi.or.cz ) is reasonably strong and you can achieve what you > want by using following comandline options: > > pass_all_alive,maximize_score,resign_threshold=0.0 > > but as the README for maximize_score says: > Note that Pachi in this mode may be slightly weaker, and result margin > should not be taken into account when judging either player's strength. > During the game, the winning/losing margin can be approximated from > Pachi's "extra komi" or "xkomi" reporting in the progress messages. > > > Regards, > Josef > > _______________________________________________ > Computer-go mailing list > Computer-go@computer-go.org > http://computer-go.org/mailman/listinfo/computer-go >
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