Top 10 Python chess-engine Projects

sunfish

12 2,880 2.5 Python

Sunfish: a Python Chess Engine in 111 lines of code

Project mention: funAndEasyToUse | /r/ProgrammerHumor | 2023-07-11

The NNUE version does but the non-NNUE version doesn't use numpy. That numpy import is for a neural network based evaluation functions. The base engine still plays at a strong human level and doesn't use numpy to do any of the heavy lifting. It does rely on itertools and collections though.

maia-chess

97 888 1.6 Python

Maia is a human-like neural network chess engine trained on millions of human games.

Project mention: Grandmaster-Level Chess Without Search | news.ycombinator.com | 2024-02-09

This was studied with the Maia series of bots. See:
https://github.com/CSSLab/maia-chess

InfluxDB

www.influxdata.com sponsored

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irwin

57 486 0.0 Python

irwin - the protector of lichess from all chess players villainous

Project mention: How common is false banning in chess? | /r/chess | 2023-07-11

For Lichess, you can get some sort of idea from reading the code. If I remember correctly, there's some threshold for the site suspecting you of cheating based on a variety of simple metrics (accuracy, blurring, etc) and then it gets sent to machine learning tools to analyze (here is one of them, and here's another).

stockfish

3 256 0.0 Python

Integrates the Stockfish chess engine with Python (by zhelyabuzhsky)
fastchess

2 83 0.0 Python

Predicts the best chess move with 27.5% accuracy by a single matrix multiplication
chess-transformers

1 23 8.3 Python

Teaching transformers to play chess

Project mention: Chess-transformers: Teaching transformers to play chess | news.ycombinator.com | 2024-01-18

numbfish

2 20 1.5 Python

♟︎ A strong python chess bot running on 1-thread
WorkOS

workos.com sponsored

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python-chess-engine

1 10 2.5 Python

Documentative UCI Chess Engine in Python
VonNiemannProbe

5 3 3.2 Python

A AVR based bluetooth telegraph inlayed in a parametric shoe insole.
Synergy-Chess

20 0 0.0 Python

system that allows you to simultaneously start 8 chess engines and obtain a single move through the majority criteria and of score.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).