# lichess-bot-devs/lichess-bot

A bridge between Lichess bots and chess engines

Repository: https://github.com/lichess-bot-devs/lichess-bot
Canonical: https://ross.abutalabs.com/products/lichess-bot
Language: Python
License: AGPL-3.0
License Family: copyleft
Topics: chess, bot, lichess-api, lichess-bot, lichess, python, bot-account, api
Last push: 2026-08-31T15:13:06+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 100, release rhythm 35, longevity 100
- inputs: {"age_days": 3061, "days_push": 2, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1073, forks 569 (observed 2026-09-01T02:14:03.736634+00:00)

## What it is
A Python bridge that connects chess engines (UCI, XBoard, or homemade) to the Lichess Bot API, letting you run a bot account that plays games on lichess.org. It supports all variants and time controls, matchmaking, tournaments, opening books, and endgame tablebases.

## Use cases
- connect a chess engine like stockfish to lichess
- run a bot account on lichess.org
- make my chess engine play online games
- enter lichess bot tournaments with my engine
- add matchmaking and opening books to a lichess bot
- host a chess bot on windows linux or docker

## When to choose
- you have a UCI/XBoard chess engine or custom Python engine and want it to play on Lichess
- you want matchmaking, tournament play, and PGN saving handled for you
- you want a maintained, well-documented bridge with cross-platform and Docker support

## When to avoid
- you want a bot for sites other than lichess.org
- you want to play with a normal (non-BOT) lichess account, since Lichess requires upgrading to a BOT account
- you need a graphical chess interface rather than an automated bot

## Facets
- artifact type: application
- maturity: active
- function: api-framework, http-client, cli
- domain: gaming-tools, apis
- platform: python, windows, cli
- tags: chess, lichess, chess-engine, bot, uci, xboard, opening-books, tablebases, automation, linux, macos, docker

## Member repositories
- lichess-bot-devs/lichess-bot (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-09-01T02:14:03.736634+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:54:43.884026+00:00, confidence not recorded.
  - readme: https://github.com/lichess-bot-devs/lichess-bot (fetched 2026-09-01T02:14:03.736634+00:00, sha 0586bba4fca3)
- Data as of 2026-08-30T08:39:29.467469+00:00.