Berserk Chess Engine

A UCI chess engine written in C. Feel free to challenge me on Lichess!

Strength

Rating Lists + Elo

Many websites use an Elo rating system to present relative skill amongst engines. Below is a list of many chess engine lists throughout the web (variance in Elo is due to different conditions for each list)

CCRL 40/15 - 3514 4CPU, 3480 1CPU
CCRL 40/2 - 3667 1CPU
IpMan Chess - 3547 1CPU
CEGT - 3598 1CPU
SPCC - 3733 1CPU
FGRL - 3518 1CPU
- List no longer maintained

Tournaments/Events with Berserk

Functional Details

Board Representation and Move Generation

Search

Negamax
- PVS
Quiescence
Iterative Deepening
Transposition Table
Aspiration Windows
Internal Iterative Reductions
Reverse Futility Pruning
Razoring
Null Move Pruning
ProbCut
FutilityPruning
- LMP
History Pruning
SEE
- Static Exchange Evaluation Pruning
LMR
Killer Heuristic
Countermove Heuristic
Extensions
- Singular

Evaluation

NNUE
- Horizontally Mirrored 16 Buckets
- 2x(12288 -> 512) -> 1
Berserk FenGen
Grapheus
~~Koivisto's CUDA Trainer~~
- This has been deprecated in favor of an even newer trainer written by Luecx, Grapheus.
~~Berserk Trainer~~
- This has been deprecated in favor of Koivisto's trainer, but trained all networks through Berserk 8.5.1+

Building

git clone https://github.com/jhonnold/berserk && \
cd berserk/src && \
make pgo CC=clang && \
./berserk

Credit

This engine could not be written without some influence and they are...

jhonnold/berserk