Re: [Computer-go] Strong engine that maximizes score

Hi! On Tue, Nov 17, 2015 at 07:05:34AM -0500, Álvaro Begué wrote: > 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. That's

Re: [Computer-go] Strong engine that maximizes score

Is the last requirement equivalent to dynamic komi? On Tue, Nov 17, 2015 at 9:49 AM, Darren Cook 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

Re: [Computer-go] Strong engine that maximizes score

> 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

Re: [Computer-go] Strong engine that maximizes score

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

Re: [Computer-go] Strong engine that maximizes score

The non-mcts levels of Many Faces try to maximize score, with some bias toward safety when ahead. The non-MCTS version uses dynamic komi to avoid giving up points in the endgame, but this is not in the version 12 released engine. David From: Computer-go

Re: [Computer-go] Strong engine that maximizes score

After reading the relevant code, I realized that val_scale=1.0 should do precisely what I wanted. I have tested it a bit, and so far so good. Thanks! Álvaro. On Tue, Nov 17, 2015 at 7:12 AM, Petr Baudis wrote: > Hi! > > On Tue, Nov 17, 2015 at 07:05:34AM -0500, Álvaro Begué

Re: [Computer-go] Mylin Valley The World Computer Weiqi Tournament

Thank you everybody. I came home yesterday. I couldn't access google or gmail in Beijing. In five stone game, I had set wrong parameter for DolBaram. I think DolBaram has more chance to win in 5 stone game. When I tested with pro. player in Korea. Dolbaram lose somtimes in 4 stone and never

Re: [Computer-go] Strong engine that maximizes score

> > 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

Re: [Computer-go] Strong engine that maximizes score

Attempting to maximize the score is not compatible with being a strong engine. If you want a dan level engine it is maximizing win-probability. David > -Original Message- > From: Computer-go [mailto:computer-go-boun...@computer-go.org] On Behalf Of > Darren Cook > Sent: Tuesday,

Re: [Computer-go] Strong engine that maximizes score

Unless you can solve the position, maximizing the score involves risk. Strong players tend to avoid unnecessary risk. Erik Op 17 nov. 2015 21:06 schreef "Álvaro Begué" : > I wouldn't say they are "not compatible", since the move that maximizes > score is always in the top

Re: [Computer-go] Strong engine that maximizes score

I wouldn't say they are "not compatible", since the move that maximizes score is always in the top class (win>draw>loss) for any setting of komi. You probably mean it in a practical sense, in that MCTS engines are stronger when maximizing win probability. I am more interested in attempting to

Re: [Computer-go] Strong engine that maximizes score

> Attempting to maximize the score is not compatible with being a > strong engine. If you want a dan level engine it is maximizing > win-probability. If you narrow it down such that komi 25.5, 27.5, and 29.5 give a black win with 63% to 67% probability, but komi 31.5 jumps to black only winning