Split-screen editor for PGN

Annotate games with syntax highlighting and visualization.

{ moves: [Move], index: int | null, initial_fen: str, current_fen: str, tags: {},

}

Move id: "0:0:Pe2:Pe4", "0:1:e7:e5", "1:0:Ng1:Nf3" getTransitionMoves(old_state, new_state) -> [Moves] undo, redo

animate: current state: fen moves index new_state

TODO:

• board moves update editor
• create variations on board
• move animations - apply and roll back moves instead of redrawing fen
• tab complete move numbers and legal moves - https://github.com/thlorenz/brace/blob/master/ext/language_tools.js
• shortcuts for Annotation symbols
• Control-f support https://github.com/thlorenz/brace/blob/master/ext/searchbox.js
• save multiple games to storage, share games with others
• list moves, e.g. https://www.npmjs.com/package/lichess-pgn-viewer
• show top engine moves
• pick themes
• spellcheck https://github.com/thlorenz/brace/blob/master/ext/spellcheck.js

  / '!!' { return '$3'; }
  / '??' { return '$4'; }
  / '!?' { return '$5'; }
  / '?!' { return '$6'; }
  / '!' { return '$1'; }
  / '?' { return '$2'; }
  / '‼' { return '$3'; }
  / '⁇' { return '$4'; }
  / '⁉' { return '$5'; }
  / '⁈' { return '$6'; }
  / '□' { return '$7'; }
  / '=' { return '$10'; }
  / '∞' { return '$13'; }
  / '⩲' { return '$14'; }
  / '⩱' { return '$15';}
  / '±' { return '$16';}
  / '∓' { return '$17';}
  / '+-' { return '$18';}
  / '-+' { return '$19';}
  / '⨀' { return '$22'; }
  / '⟳' { return '$32'; }
  / '→' { return '$36'; }
  / '↑' { return '$40'; }
  / '⇆' { return '$132'; }
  / 'D' { return '$220'; }

https://github.com/rabidaudio/cm-pgn/tree/move-locations https://www.npmjs.com/package/chess.js https://github.com/lichess-org/chessground/blob/master/src/state.ts https://github.com/lichess-org/chessground/blob/master/src/api.ts https://github.com/thlorenz/brace/blob/master/theme/monokai.js https://ace.c9.io/