Chess-Typescript

A minimal Chess Engine fully written in Typescript.

This library includes:

All moves in chess
Move validation
FEN support
The board is a single-dimensional array.
Move history
Fifty-Move rule (Can be turned off)
Super basic AI

Usage:

DENO

import { ... } from 'https://deno.land/x/chess_typescript/mod.ts'

NODE

npm i chess_typescript

import { ... } from 'chess_typescript'

Example: Easy AI vs Monkey AI

// import ....

const main = async () => {
    const chessGame = ChessGame.newStandardGame();
    const easyAI = new AI.EasyAI(chessGame);
    const monkeyAI = new AI.MonkeyAI(chessGame);

    chessGame.onBlackPromote = () => {
        const lastMove = chessGame.mover.getLastMove();
        // pieceType | color
        chessGame.board.tiles[lastMove.to.index].code =
            Utils.randomFromArray([Type.bishop, Type.queen, Type.knight, Type.rook]) |
            lastMove.from.color;
        // if we didn't set the piece type on promote, the piece will turn into a queen
    };


    console.log(chessGame.board.toString());
    /**
        ♜ ♞ ♝ ♛ ♚ ♝ ♞ ♜ 
        ♟ ♟ ♟ ♟ ♟ ♟ ♟ ♟ 




        ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙ 
        ♖ ♘ ♗ ♕ ♔ ♗ ♘ ♖ 
     */

    let mv = 0;

    while (!chessGame.gameOver) {
        console.clear();
        // easyAI as white, and monkeyAI as black
        const move = mv++ % 2 == 0 ? easyAI.getMove() : monkeyAI.getMove();
        if (move) {
            chessGame.mover.moveStrict(move.from, move.to);
            // NEEDED
            chessGame.mover.next();
        }
        console.log(move);
        console.log(chessGame.board.toString());
        await Utils.sleep(500);
    }

    console.log(chessGame.gameOverReason + '!');
};

main().catch((err) => console.error(err));