Search found 777 matches

by Joerg Oster
Thu Oct 22, 2020 10:04 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: uct algorithm bad at chess?
Replies: 7
Views: 279

Re: uct algorithm bad at chess?

OfekShochat wrote:
Thu Oct 22, 2020 9:59 am
Yeah, what is yours set at? I tried 2, 1.5, 4, 0.5
In the example given it was sqrt(2) if I'm not mistaken.
I'm not sure one value will fit all positions, though ... :D
by Joerg Oster
Thu Oct 22, 2020 9:58 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: uct algorithm bad at chess?
Replies: 7
Views: 279

Re: no pv line

You can do the PV line with picking the one with the most visits (or however you choose the best move) and do for the second depth node from the best move in the first depth. The same for all depths Thank you. Yes, I pick the move with the most visits as best move. But like I said this is very basi...
by Joerg Oster
Thu Oct 22, 2020 9:09 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: uct algorithm bad at chess?
Replies: 7
Views: 279

Re: uct algorithm bad at chess?

I implemented the UCT algorithm with the ucb1 policy. But it seems that it is awful (choosing terrible moves with high depth). Is that a bug in my implementation, or what? thank you Some weeks ago I put a very basic (and very crude and hackish) UCT search into Stockfish, also with the standard UCB1...
by Joerg Oster
Mon Oct 19, 2020 8:45 pm
Forum: Computer Chess Club: General Topics
Topic: CTF Survey
Replies: 71
Views: 3909

Re: CTF Survey

2. CTF should be closed
by Joerg Oster
Sat Sep 19, 2020 10:08 am
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3683

Re: Yet another parameter tuner using optuna framework

Those are the bishops. Now if we look at the slice plot, the tuner is somewhat confused, the trials are all over the place for the BishopValueEn. Trials are somewhat divided in the 320 to 340 range and also in the 340 to 360 range. The number of trials for those plots are 300 from 24 games/trial at...
by Joerg Oster
Sat Sep 19, 2020 9:41 am
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3683

Re: Yet another parameter tuner using optuna framework

Damir wrote:
Sat Sep 19, 2020 8:51 am
Hi Jörg

Thanks a lot for this tunable Stockfish. If possible can you also put NNUE inside, ( whitout) embeeded net :) :)
For what purpose?
If you simply want a configurable Stockfish, for the handcrafted eval that is,
there are some forks around which offer this functionality.
by Joerg Oster
Sat Sep 19, 2020 7:14 am
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3683

Re: Yet another parameter tuner using optuna framework

@Joerg Could you create a Stockfish where it exposes its material piece value and other evaluation param perhaps and a couple of search parameters. I can make it but may take sometime. I want to test optuna with it and later compare with other tuner like spsa and chess tuning tools and others perha...
by Joerg Oster
Fri Sep 18, 2020 10:21 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish performing bad on ryzen cpu.
Replies: 49
Views: 4217

Re: Stockfish performing bad on ryzen cpu.

I am extremely sorry if someone got hurt by this topic. I never meant to criticize anyone. I am apologizing to Talkchess Community and anyone who got hurt by my words which I never wanted to. Sorry everyone. My problem is not solved but no problem. As some members pointed out, I maybe doing somethi...
by Joerg Oster
Fri Sep 18, 2020 10:19 am
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3683

Re: Yet another parameter tuner using optuna framework

@Joerg Could you create a Stockfish where it exposes its material piece value and other evaluation param perhaps and a couple of search parameters. I can make it but may take sometime. I want to test optuna with it and later compare with other tuner like spsa and chess tuning tools and others perha...