Parse PGN files into a JS data structure (and syntax validation on the PGN)
From the command line: pgn-parser.js some/pgn/file.pgn
From js
const pgnParser = require('pgn-parser'); pgnParser((err, parser) => { const [result] = parser.parse('[White "me"]\n[Black "you"]\n1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 (3. ...Nf6 {is the two knights}) 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O Nge7 $1 *'); console.log(result); }); The result parsing the PGN above would be
[ { headers: { White: "me", Black: "you" }, result: "*", moves: [ { move: 'e4', move_number: 1}, { move: 'e5', { move: 'Nf3', move_number: 2}, { move: 'Nc6'}, { move: 'Bc4', move_number: 3}, { move: 'Bc5', ravs: [{ moves: [{move_number: 3, move: "...Nf6", comment: "is the two knights"}]}]}, { move: 'b4', move_number: 4}, { move: 'Bxb4'}, { move: 'c3', move_number: 5}, { move: 'Ba5'}, { move: 'd4', move_number: 6}, { move: 'exd4'}, { move: 'O-O', move_number: 7}, { move: 'Nge7', nags: ["$1"]} ] } ] npm install npm test