official-stockfish/Stockfish
A free and strong UCI chess engine observed · 2026-08-28
Health v2 · maintenance only
77/100
- Activity 99
- Release rhythm 36
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 255.5
- age_days: 4459
- days_rel: 214
- days_push: 8
- n_releases_24m: 3
Adoption not part of the score
16419 stars · 2992 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Stockfish is a free, open-source UCI chess engine that analyzes positions and computes optimal moves using alpha-beta search with NNUE neural network evaluation. It ships without a GUI and is designed to be paired with external chess interfaces.
Use cases
- analyze chess positions and find the best moves
- power a chess website or app with a strong engine
- run engine-vs-engine matches and testing
- get move-by-move analysis of my games
- embed a chess engine in a GUI like a chessboard app
When to choose
- you need a top-strength chess engine for analysis or play
- you want a UCI engine compatible with standard chess GUIs
- you need cross-platform support including mobile
When to avoid
- you want a graphical chessboard out of the box
- you need engines for games other than chess
Facets
application · maturity active
game-engine machine-learning gaming-tools simulation cross-platform windows cli chess uci nnue chess-engine linux macos android ios
3 sources
- readme: https://github.com/official-stockfish/Stockfish · fetched 2026-08-28 · 7a44867aba78
- homepage: https://stockfishchess.org/ · fetched 2026-08-29 · 64c0a64cef30
- site_page: https://stockfishchess.org/about · fetched 2026-08-29 · f1884253e65e
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| official-stockfish/Stockfish | main | 77 |
For agents
markdown · JSON · MCP: product_card(name="official-stockfish/Stockfish")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem