• Fuzzy stone placement
• Read and save SGF games and collections, open wBaduk NGF and Tygem GIB files
• Display formatted SGF comments using a subset of Markdown and annotate board positions & moves
• Personalize board appearance with textures & themes
• SGF editing tools, including lines & arrows board markup
• Copy & paste variations
• Powerful undo/redo
• Fast game tree
• Score estimator & scoring tool
• Find move by move position and comment text
• GTP engines support with board analysis for supported engines
• Guess mode
• Autoplay games

For more information visit the documentation. You're welcome to contribute to this project.

See Building & Tests in the documentation.

This project is licensed under the MIT license.

A big thank you to these lovely people:

• Eric Wainwright
• Michael Noll
• John Hager
• Azim Palmer
• Hans Christian Poerschke
• David Göbel
• Dominik Olszewski
• Brian Weaver
• Philippe Fanaro
• Dimitri Rusin
• Frank Orben
• Dekun Song
• Andrew Thieman
• Adrian Petrescu
• Karlheinz Agsteiner
• Petr Růžička
• Sergio Villegas
• Jake Pivnik

• Shudan - A highly customizable, low-level Preact Goban component.
• boardmatcher - Finds patterns & shapes in Go board arrangements and names moves.
• deadstones - Simple Monte Carlo functions to determine dead stones.
• go-board - A Go board data type.
• gtp - A Node.js module for handling GTP engines.
• immutable-gametree - An immutable game tree data type.
• influence - Simple heuristics for estimating influence maps on Go positions.
• sgf - A library for parsing and creating SGF files.