Search found 4283 matches

by Ferdy
Sun Oct 11, 2020 9:32 pm
Forum: Computer Chess Club: General Topics
Topic: INTERESTING Engines with Unique Styles (Unlike SF)
Replies: 55
Views: 3048

Re: INTERESTING Engines with Unique Styles (Unlike SF)

This is a fresh thread for Thorsten's idea of making a list of all "interesting" engines. For me, in no particular order, they are: Teki 2 Thinker 5.1c Passive Baron 1.8.1 Gandalf 6 WChess 1.06 Vajolet 2.03 ProDeo 1.0-1.6 (assuming no personality used) ZuriChess Graubuenden Alfil 8.11 Stash 21.0 (n...
by Ferdy
Sun Oct 11, 2020 8:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Is there a fen suite to ...
Replies: 6
Views: 272

Re: Is there a fen suite to ...

Is this pure wood count, or do you take material imbalance into consideration also? Pure wood count. 100,300,300,500,900 Uploaded material epds in github. pawns.epd r4rk1/p2b2pp/1q2pb2/3p3Q/3p4/3B4/PP3PPP/R1B1R1K1 b - - ce 100; r7/p2q1rk1/2p4p/4P1p1/1BQ1Ppb1/1P6/P1P3PP/4RRK1 w - - ce 200; ce values...
by Ferdy
Sun Oct 11, 2020 6:31 am
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3056

Re: Yet another parameter tuner using optuna framework

No4b wrote:
Sat Oct 10, 2020 1:58 pm
I tried to use this tuner for my Drofa engine with some nice results.
Thanks for info. Looking forward for your next test.

In case you are not aware, I run a fixed depth test comparing different algorithms. Would like to do a test with time control next.
by Ferdy
Fri Oct 09, 2020 7:39 pm
Forum: Computer Chess Club: General Topics
Topic: Determining evaluation by a genetic algorithm
Replies: 5
Views: 261

Re: Determining evaluation by a genetic algorithm

We had a fun experiment on GA with stegemma.

There are also optimizers at nevergrad on GA.
by Ferdy
Mon Oct 05, 2020 11:34 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: How to calculate piece weights with logistic regression?
Replies: 12
Views: 774

Re: How to calculate piece weights with logistic regression?

Put up a repo on github for piece value estimator . It uses different linear models from sklearn lib. Sample output fen P-p ... Q-q result 0 r3r3/pbp1kp2/2p2bpp/2N1p3/8/5B2/PPP2PPP/2KRR3 ... -1 ... 0 1 1 3rr1k1/pb4pp/2p1n3/1p1n4/1P1qN3/P7/B1Q2PPP/3R1... 0 ... 0 0 2 6k1/p1p3p1/1p5p/4p3/2P2n2/2P2B2/P4...
by Ferdy
Sat Oct 03, 2020 2:56 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: How to calculate piece weights with logistic regression?
Replies: 12
Views: 774

Re: How to calculate piece weights with logistic regression?

maksimKorzh wrote:
Thu Oct 01, 2020 6:50 pm

# replace results with binary outcomes
positions['Result'] = positions['Result'].replace('1-0', 1).replace('0-1', -1)
Perhaps the win probability should be mapped to [0, 1], not [-1, 1]. In that case that would be:
positions['Result'] = positions['Result'].replace('1-0', 1).replace('0-1', 0)
by Ferdy
Sat Sep 19, 2020 10:19 am
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3056

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 Ferdy
Sat Sep 19, 2020 7:53 am
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3056

Re: Yet another parameter tuner using optuna framework

@Ferdy I've put something online here https://github.com/joergoster/Stockfish/releases/tag/v1 It's a modern build from end of July version, pre NNUE, with some eval parameters made tunable, plus 2 search margins. Hope it works for you. If you want some other parameters exposed for tuning, please le...
by Ferdy
Fri Sep 18, 2020 1:01 pm
Forum: Computer Chess Club: General Topics
Topic: Yet another parameter tuner using optuna framework
Replies: 36
Views: 3056

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...