Computer Chess
A curated list of links for computer chess enthusiasts — engines, AI, GUIs, ratings lists, tablebases, test suites, and more. Links maintained by club members.
Found a broken link? Email us at WestportChessClub@gmail.com.
Watch live computer chess
See the best engines compete at TCEC or Chess.com Computer Chess Championship.
Watch Leela Chess Zero (and other Lc0 flavors) get tested on Twitch or YouTube at @edosani, @potato_chess, @brinansee, Mark Young, and sometimes @westportchess.
Free chess engines
Some of the strongest free traditional (non-AI) engines:
asmFish · BrainFish · CorChess · Ethereal · Fire · Fizbo · Komodo 9 · Laser · Raubfisch · ShashChess · Stockfish · Stockfish DEV builds · ThothFish · Xiphos
Many more at Computer-Chess.org. We also host some engines for download here.
Free AI chess engines
Leela Chess Zero (Lc0) — a neural-network chess engine.
Download the latest release (use "blas" for CPU-only, "cuda" for NVIDIA GPUs, or "OpenCL" for other GPUs). See the installation guide. You'll also need to download a neural network. Here's a list of the strongest Lc0 networks.
We have backups of several strong Lc0 neural nets (weights files) hosted here.
Engine rankings & ratings lists
Opening books for engine testing
Stefan Pohl's opening books are a good starting point. We also host some opening books we like here.
Endgame tablebase (EGTB) downloads
Free computer chess GUIs
Arena · Banksia · ChessGUI · Cute Chess · Lucas Chess · Nibbler (made specifically for Lc0) · SCID · Zentropy
We also have backups of these and more GUIs here.
Free computer chess utilities
Bayesian Elo calculator · Ordo ratings calculator · PGN Scanner 0.92
Tactical test suites
Use a test suite to measure how well your engine handles tactical or endgame positions:
More test suites available here.