Based on besogo

  • Usable offline, cross-platform with no installation (just download the source and open testing.html)
  • Embeddable, responsive, and modular
  • Editor, viewer, and diagram widgets (see examples below)
  • Position editing, custom markup, comment, and game info tools
  • Keyboard and mousewheel navigation
  • Game tree navigator
  • Supports both "sibling" and "child" variation markup styles
  • Multiple board coordinate labeling options (toggle with the 四4 button)
  • Realistic board and stone textures (CC-licensed assets from other projects)
  • Written in JavaScript, CSS, and HTML5 with no dependencies
  • Free, open-source software (AGPL license)