<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Interactive Chess</title>
  <link href="https://cdnjs.cloudflare.com/ajax/libs/chessboard-js/1.0.0/chessboard-1.0.0.min.css" rel="stylesheet" />
  <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/chessboard-js/1.0.0/chessboard-1.0.0.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/chess.js/0.10.2/chess.min.js"></script>
</head>
<body>
  <div id="board" style="width: 400px;"></div>
  <script>
    // Initialize chess.js
    var game = new Chess();
    
    // Initialize chessboard.js
    var board = Chessboard('board', {
      draggable: true,
      position: 'start',
      onDragStart: onDragStart,
      onDrop: onDrop,
      onMouseoutSquare: onMouseoutSquare,
      onMouseoverSquare: onMouseoverSquare,
      onSnapEnd: onSnapEnd
    });

    // Define drag and drop functions
    function onDragStart(source, piece, position, orientation) {
      if (game.in_checkmate() === true || game.in_draw() === true ||
          piece.search(/^b/) !== -1) {
        return false;
      }
    };

    function onDrop(source, target) {
      var move = game.move({
        from: source,
        to: target,
        promotion: 'q'
      });

      if (move === null) {
        return 'snapback';
      }
    };

    function onMouseoverSquare(square, piece) {
      // Highlight square
    };

    function onMouseoutSquare(square, piece) {
      // Unhighlight square
    };

    function onSnapEnd() {
      board.position(game.fen());
    };
  </script>
</body>
</html>