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Hi Norman, thanks for the new version, including source code :) I tested 8.0 privately under CEGT conditions. Does it make sense to re-test, i.e. is 8.1 stronger/different/weaker :oops: than 8.0? Or can I use the games from 8.0 for our list? I have no problem to re-test if you think it's better. Th...

Ratings of chess engines are well established on the known rating lists. Will anything change when we feed engines with only (playable) gambit positions? We carefully created 50 gambit opening positions to find out. With 6 top entries that means 500 games each. First run at 40/2 ccrl style as a warm...

I shuffled the 1.8 million positions and split them into 18 parts of 100,000. Download - http://rebel13.nl/dump/noob.7z Pick a set, test it sequential. Pick another set, test it sequential and compare if results match better. I did both, first: - 10,000 games random , 10 times divided over 2 PC's. ...

Thanks for your work and for sharing it. It is quite amazing! I'm still not a believer in theory that static PSTs are superior to dynamic algorithmic created PST's, before every search. It is my current goal for my new engine to do tuning of dynamically created PSTs during search by using a portion...

I think I have about 25 million analyzed Stockfish 13 (opening) positions in EPD format. It looks like this: r2r2k1/ppp1nppp/3p1q2/8/2N1PP2/2P2Q2/PP4PP/R4RK1 b - - bm d5; ce -3; acd 20; 1r2k2r/p1pqbppp/5n2/3p4/8/8/PPP1QPPP/RNB1R1K1 b k - bm O-O; ce 85; acd 20; 2krr3/p1pp2pp/b1pb1n2/R7/2P4P/PqN1B3/1...

Knowledge Base 1.0 is the work of months carefully building a quality Polyglot database with analyzed positions by top engines, mainly by Stockfish 12 and Stockfish 13 covering about 95% of the general opening theory. The estimated total computer time roughly is about 8 years 24/7 single cpu time l...

Wow this is awesome. Is there a way to query this database? I'm not familiar with Polyglot. I'm building a similar database with Stockfish 13 and storing the evaluations in a MongoDB database. This would make a great resource for training neural networks. Maybe consider making it available through ...

Knowledge Base 1.0 is the work of months carefully building a quality Polyglot database with analyzed positions by top engines, mainly by Stockfish 12 and Stockfish 13 covering about 95% of the general opening theory. The estimated total computer time roughly is about 8 years 24/7 single cpu time l...

Opening selection is randomly. Which does mean lots of duplicate openings get played in the long run. I have never tested what you proposed. Really you need two sets of tests: 1. First play a set of N games between two engines using the same openings, 5 times. 2. Then play a set of N randomly selec...

Random seems to me the best option indeed as I noticed that sequential chunks are from the same game. OTOH, since matches are not equal regarding the openings, has it been tried to run the same match of (say) 20,000 games between Ethereal and Rubichess 4-5 times and that the results are about equal?