...Marco ZerbinatiEduard wrote: ↑Fri Aug 13, 2021 2:55 pmI know all of these engines. Unfortunately, Cfish is not up to date, but above all the latest version does not run as AVX2. Without AVX2, Cfish is with me (Ryzen CPU), slower than the current Stockfish.ChickenLogic wrote: ↑Fri Aug 13, 2021 6:44 amOnce CFish is up to date with Stockfish master again you can use up to two polyglot books. Alternatively, you can use Brainlearn which dynamically builds a persistent hash to guide SF's search which turns out to increase SF's strength about as much as a regular book. This will need a couple of thousand games, though.Eduard wrote: ↑Thu Aug 12, 2021 7:35 pm The Stockfish developers are currently working hard to make Stockfish stronger (and to hunt down derivatives). Constantly new versions and new networks! That is very nice, but it lacks other basic functions. Playing without a book is no fun! Yesterday I played a few games with the latest stockfish and net from Sopel on Lichess. But I had to play without a book. That's shit and of no value in the long run.
I will soon delete some derivatives from my hard drive due to GPL violation. But then I almost no longer have an up-to-date engine with the ability to load polyglot books.
What can I do against it? With other GUIs I can load native books and play them on the servers. But I can't do that on Lichess.
What alternatives do I have? Do I have to stop playing Lichess?
Or maybe Banksia will offer an option to load opening books for playing on Lichess?
I commend you for not using SF derivatives that don't honour SF's license.
The newest engine (with book support) for me is SugaR AI 2.30. That's nice, and thanks to Marco Zerbitani for that.
There is also a Stockfish Polyglot that can load 4 books. The engine is from June 2021.
My fun is testing the latest networks. This is the point for me to test for lichess.
The latest engine from Sopel + Netz is very strong and fun too. The new architecture plays strong. However, the network has a size of 45,900 kb. Only Sopel's engine can use it. Unfortunately, the developer does not consider that one would also like to test with books. Is it that hard to implement an option for a book? No Stockfish can use native books! A shame and embarrassing. But all derivatives can do that. That should change.

Maybe BSG could include a native opening book working with all engines (and optimized for playing with black or white)
Regards, Alex