chess.com Stockfish 15 Aid

// USE THIS AT YOUR OWN RISK - I AM NOT AT FAULT OR RESPONSIBLE FOR ANYTHING
// How to use: 1. Go to chess.com   2. Go into a game   3. Open inspect element/developer tools, the console and then paste the code and press enter  4. Voila! The best move is being highlighted as  a blue square.

// Load Stockfish 15 engine
const stockfish = new Worker('https://cdn.jsdelivr.net/npm/stockfish-15-js/stockfish-15-js.js');

// Set the position of the chess board
const position = 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';

// Set the difficulty level of the engine
const level = 20;

// Send commands to Stockfish engine
stockfish.postMessage('uci');
stockfish.postMessage(`position fen ${position}`);
stockfish.postMessage(`go depth ${level}`);

// Listen for the best move from Stockfish engine
stockfish.onmessage = (event) => {
  const message = event.data;

  if (message.startsWith('bestmove')) {
    const bestMove = message.split(' ')[1];

    // Highlight the best move on the chess board
    const squares = document.querySelectorAll('.cg-board .cg-square');
    squares.forEach((square) => {
      if (square.dataset.square === bestMove.slice(0, 2)) {
        square.style.backgroundColor = 'green';
      } else if (square.dataset.square === bestMove.slice(2, 4)) {
        square.style.backgroundColor = 'yellow';
      }
    });
  }
};