Top 6 chess-variant Open-Source Projects

Fairy-Stockfish

19 559 7.9 C++

chess variant engine supporting Xiangqi, Shogi, Janggi, Makruk, S-Chess, Crazyhouse, Bughouse, and many more
openingtree

54 361 0.0 JavaScript

Consolidated view of all your chess games from chess.com, lichess, grandmaster games or custom pgn.

Project mention: I have 600 elo, i have 1 week to beat my D&D GM with 1500 elo | /r/chess | 2023-07-04

If you know his account on any chess sites you can take a look at it on https://www.openingtree.com/ and find a line he plays that is bad for him, intentionally go for it and have some prep once you there.

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
liground

3 94 3.1 Vue

A free, open-source and modern Chess Variant Analysis GUI for the 21st century
chess-pieces

1 33 0.0

Chess, Janggi, Xiangqi, Sittuyin pieces and boards
chess-variant-stats

1 15 10.0 Python

Calculate game statistics for chess variants
A.C.A.S

1 0 5.3 HTML

Moved to psyyke.github.io

Project mention: Advanced Chess Assistance System: A.C.A.S | /r/userscripts | 2023-07-08

I'm excited to finally publish my biggest project ever, A.C.A.S. It's an advanced chess assistance system, or in a not so subtle way, a chess cheat. (Note that I'm not advocating cheating, only use this against bots, seriously!)

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).