computer-chess

C# Chess Engine

superhuman single-file uci chess engine under 1k LoC of C99

Computer chess index

NNUE Chess engine in C++

Milky // A hopefully strong UCI chess engine

42's club chess engine.

An experimental UCI-compatible chess engine designed to explore Modern B* and custom DCP/DCPS search algorithms. At its core, it combines classical B*, PUCT, and various evaluation and policy networks.

UCI integration for the micro-Max 4.8 chess engine

Next-generation superhuman chess AI engine & research arena. Features Dual-NNUE, spatial policy ViT, playable bots (Stockfish 17, Lc0, AlphaZero, Maia), and a 17-note research vault.

A free, open-source C++20 UCI chess engine with NNUE evaluation, Lazy SMP multithreading, and Syzygy tablebase support. Named after Coco from Witch Hat Atelier.

Public repository for PHILOCHESS, a learning-oriented UCI chess engine written in C++ and designed to provide an accessible introduction to chess-engine development and the fundamental principles of chess.

A bitboard based chess engine

Multilingual Windows integrity checker for Syzygy chess tablebases, with multithreading, checkpoint/resume and reporting.

Windows tool for filtering and cleaning large PGN chess-game collections by Elo, game length and time control.

Stockfish19+ — custom Stockfish 19 fork with Windows AVX2 and AVX-512 builds.

Crafty 25.6.1 with HCE, project-trained NNUE Light, and CraftyNNv2 Heavy evaluation modes.

Dolphin - a free UCI chess engine in C# (.NET) with a self-trained NNUE neural network, bitboards, modern alpha-beta search, Lazy SMP and a built-in self-play training pipeline. Plays in Arena, Cute Chess and any UCI GUI.

NARC Engine - a grandmaster-strength UCI chess engine built from scratch with a self-trained NNUE. ~3013 CCRL. Closed source.

Open-source tools for building and improving computer chess opening books, including Source2Metal and SyzygyCheck.

Zipped PGNs of the Chesscom CCC