polyglot-chess

Polyglot is a node module to search moves in polyglot format opening books.

Polyglot

Polyglot is a node module to search moves in polyglot format opening books.

Make sure you have node.js installed. Then do:

$ npm install polyglot
var Polyglot = require('polyglot').Polyglot;
 
var obj = new Polyglot();
 
var fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
console.log("Polyglot hash for fen " + fen + " is: " + obj.hash(fen));
console.log("Best move in the book is: " + obj.find(fen, "book.bin", true));
console.log("Random move in the book is: " + obj.find(fen, "book.bin", false));

Polyglot exposes following functions -

find takes a book file path and a polyglot format hash and looks up the hash in the book file. If findBest is true it returns the best move according to the weight otherwise it returns a random move with the given hash.

hash takes a fen string and returns its polyglot hash.

Fork, pick an issue to fix from issues or add a missing feature and send a pull request.

This work is derivative of the excellent stockfish polyglot book source code.

Polyglot is released under the MIT License. See the bundled LICENSE file for details.