They waited and finally got it !!
This is not the official logo of the Berserk chess engine.
This is about fans and sympathizers of the Berserk chess engine, to which I also belong :-)
If you haven't yet heard of the Berserk chess engine, then I invite you to visit a special page dedicated to the Berserk chess engine - here.
The latest eleventh release of the Berserk chess engine brings a lot of changes, improvements and new features in the source code of this popular and extremely powerful chess engine.
Berserk is a free open source chess engine under GNU GPL 3.0 license.
* I hope that no but no company will get the idea to use the source code of the Berserk chess engine contrary to the provisions of this license ;-)
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What's Changed
Don't increase reductions for cutnodes when the move is tactical by @jhonnold in #417
Between search optimizations by @jhonnold in #418
Disable SE Extensions when clearly winning by @jhonnold in #419
Fast Range over modulo for TT indexing by @jhonnold in #420
Setup Pyrrhic submodule by @jhonnold in #421
Remove depth requirement on eval adjustment by @jhonnold in #422
Fix recapture extension extending non-captures by @jhonnold in #423
Introduce negative reductions when hash move is singular by @jhonnold in #424
Update Github Workflow to force Ubuntu 20.04 by @jhonnold in #425
Standard LMR + PVS Logic by @jhonnold in #426
Search Stack by @jhonnold in #428
Combined Patches by @jhonnold in #430
Cleanup by @jherrera80 in #429
MovePicker Refactor by @jhonnold in #433
Prevent positive score differences from impacting TM by @jhonnold in #435
12 Byte TT Entries by @jhonnold in #437
Accumulator Cleanup by @jhonnold in #438
QSearch ordering strictly based on Capture History by @jhonnold in #439
Utilize 128bit multiplication for TT indexing by @jhonnold in #440
Train with a mix of Berserk and Koivisto data by @jhonnold in #445
Track bestmove using "Root Moves" by @jhonnold in #446
Move Type in Continuation History by @jhonnold in #447
Add simple protections for search explosions due to extensions by @jhonnold in #448
History values fit within int16_t by @jhonnold in #449
Remove SF Chess960 Cornered Bishop Logic by @jhonnold in #450
General Cleanups by @jhonnold in #451
Speedups by @jhonnold in #452
Optimize Apply Updates by @jhonnold in #453
Additional continuation histoy for follow-follow up by @jhonnold in #454
Separate Move Pickers by @jhonnold in #455
Hold TT Entry by @jhonnold in #456
Increase hidden layer to 768 neurons by @jhonnold in #458
No TT eval correction in QSearch by @jhonnold in #459
Updates by @jhonnold in #460
Add PV TT Eval correction in QSearch by @jhonnold in #461
Identify upcoming repetitions by @jhonnold in #462
Add WDL Output and Normalize CP to 50% at 100cp by @jhonnold in #463
Utilize LMR Depth when move pruning quiets by @jhonnold in #465
History Pruning by @jhonnold in #466
Split Good and Bad captures with history and SEE by @jhonnold in #467
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Source: GitHub
A lot of it, right ?
Berserk chess engine author Jay Honnold and a new contributor nicknamed jherrera80 have been very busily over the last few months, as I witnessed by following their work on GitHub.
And there was certainly plenty to do. Berserk is one of the world's top chess engines, and undoubtedly the development of an already advanced and sophisticated chess engine is not a trivial thing and requires advanced programming techniques and extensive knowledge.
The official logo of the Berserk chess engine, source: GitHub
Have these so many changes been followed by the strength of Berserk as well?
Let's see its performance:
Source: MCERL (ongoing)
After playing 1100 games: 3652 Elo.
36 Elo more than Berserk 10.
I'm happy to say that Berserk is growing in strength and consolidating on the third place of the MCERL rating list :)
(Dragon 3.2 and Dragon 2.6.1 are the same chess engine by Komodo Chess in different versions).
It is noteworthy that:
There is an increasing difference in playing power between Berserk and the next Koivisto, even though it was recently released just 1 month earlier.
Berserk 11 plays at a very similar level to the excellent Dragon 2.6.1 by Komodo Chess, which is a commercial chess engine (6 Elo difference).
Big kudos to Jay Honnold and jherrera80 and hearty congratulations to the significant increase in the strength of the Berserk 11 chess engine.
I also thank you for such a universal source code that allows compilation for different systems. Respect!
Update 2023-02-21
Release: Berserk-11.1
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Note: TCs with an increment are mostly un-impacted.
This is a bug fix release to resolve a major issue with TM in cyclical and no-increment TCs. Berserk would use all of it's time until playing completely random moves. Apologies for all testers who potentially wasted their time and CPU hours on a buggy Berserk.
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Source: GitHub
Download area is at your disposal:
Berserk 11.1 source code & neural network – by Berserk Devs
Android – Compiled by Archimedes
Linux arm64 & x64 – Compiled by Darius
Mac Apple Silicon & Intel – Compiled by Darius
Windows x64 – Compiled by Darius
In the Files area you will find free chess engines for download.