PGN Manager 📦♟️

A powerful TypeScript/JavaScript library for managing chess PGN (Portable Game Notation) files with support for variations and game traversal.

Features ✨

• Parse PGN strings into manageable objects
• Navigate through main lines and variations
• Access FEN positions for any move
• Handle game headers
• Traverse moves forward and backward
• Full TypeScript support

Installation 🚀

npm install pgn-manager

Usage 💻

import PGNManager from 'pgn-manager';

// Initialize with a PGN string
const pgn = `1. e4 e5 2. Nf3 Nc6 (2... d6 3. d4) 3. Bb5 *`;
const manager = new PGNManager(pgn);

// Get the first move
const firstMove = manager.getFirstMove();

// Navigate through moves
const nextMove = manager.nextMove(firstMove);
const prevMove = manager.previousMove(nextMove);

// Get FEN position for a move
const fen = manager.getMoveFen(firstMove);

// Access game headers
const headers = manager.headers;

API Reference 📚

Constructor

• new PGNManager(pgn: string): Creates a new PGN manager instance

Properties

• pgn: Get the raw PGN string
• parsedPGN: Get the parsed PGN object
• headers: Get game headers array

Methods

• getMove(moveNumber: number): Get move by number
• getMoveNumber(move: Move): Get number for a move
• nextMove(move: Move): Get next move in the sequence
• previousMove(move: Move): Get previous move
• hasNextMove(move: Move): Check if move has a next move
• getFirstMove(): Get the first move of the game
• getLastMove(): Get the last move of the game
• getMoveFen(move: Move): Get FEN position after move
• getParentRav(move: Move): Get parent variation for move

Examples 🎯

Traversing Main Line

const manager = new PGNManager("1. e4 e5 2. Nf3 Nc6 3. Bb5 *");
let move = manager.getFirstMove();

while (manager.hasNextMove(move)) {
  console.log(move.move);
  move = manager.nextMove(move);
}

Working with Variations

const manager = new PGNManager("1. e4 e5 2. Nf3 Nc6 (2... d6 3. d4) 3. Bb5 *");
const move = manager.getMove(2); // Get second move
const variation = manager.getParentRav(move);

if (variation) {
  console.log("Move is part of a variation!");
}

Contributing 🤝

Contributions are welcome! Feel free to submit issues and pull requests.

License 📄

MIT License - feel free to use this in your projects!