Berserk 9 released.

Darius
Jun 19, 2022
1 min read

Updated: Jan 4, 2023

One of the most powerful chess engines has been released in version 9.

Here's what Jay Honnold wrote about Berserk 9:

Another release for Berserk! This patch sees major changes in NNUE and many minor adjustments in search.

This patch introduces a new architecture in Berserk, a horizontally mirrored 8 bucket system. This results in a 6144 -> (512x2) -> 1 final architecture. This network was trained using Koivisto's Trainer using ~8B FENs from Berserk 8.5.1 self play games.

Along the way of working on NNUE, many minor search patches have been added. They were all minor, but lots of small changes add up.

STC on an imbalanced book

ELO   | 82.98 +- 5.14 (95%)
CONF  | 8.0+0.08s Threads=1 Hash=8MB
GAMES | N: 10000 W: 3985 L: 1641 D: 4374

LTC on a balanced book

ELO   | 54.37 +- 2.65 (95%)
CONF  | 40.0+0.40s Threads=1 Hash=64MB
GAMES | N: 17000 W: 3605 L: 966 D: 12429

Self play results vs Berserk 8.5.1, self play results do not reflect exactly when playing vs other engines.

Source: Berserk 9 on GitHub

Berserk 9 download:

Compiled by Archimedes

Compiled by Darius

Compiled by Jay Honnold

4 Comments

Alessandro Morales

Jul 27, 2022

Berserk 10-dev is out! I try to compile it for Mac M1 by myself and in case I'll return here

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Darius

Jul 28, 2022

Replying to

Feel free to download the latest version of Berserk-20220725.

The archive with the executable file for Macs with M1 processor is in the Files section.

Jun 19, 2022

Thank you! I have issues compiling it on Mac M1, now I will use your compile 😀

Fantastic 😊