/**** 
* Plugins
****/ 
var storage = LK.import("@upit/storage.v1", {
	elo: 1200
});
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var ChessBoard = Container.expand(function () {
	var self = Container.call(this);
	self.squares = [];
	self.pieces = [];
	self.moveHistory = [];
	self.capturedWhite = [];
	self.capturedBlack = [];
	self.init = function () {
		self.createBoard();
		self.setupPieces();
		return self;
	};
	self.createBoard = function () {
		for (var row = 0; row < 8; row++) {
			self.squares[row] = [];
			for (var col = 0; col < 8; col++) {
				var isLight = (row + col) % 2 === 0;
				var assetId = isLight ? 'squareLight' : 'squareDark';
				var square = LK.getAsset(assetId, {
					anchorX: 0,
					anchorY: 0
				});
				square.x = BOARD_START_X + col * SQUARE_SIZE;
				square.y = BOARD_START_Y + row * SQUARE_SIZE;
				square.boardX = col;
				square.boardY = row;
				self.addChild(square);
				self.squares[row][col] = square;
			}
		}
	};
	self.setupPieces = function () {
		var initialSetup = [['rook', 'knight', 'bishop', 'queen', 'king', 'bishop', 'knight', 'rook'], ['pawn', 'pawn', 'pawn', 'pawn', 'pawn', 'pawn', 'pawn', 'pawn'], [null, null, null, null, null, null, null, null], [null, null, null, null, null, null, null, null], [null, null, null, null, null, null, null, null], [null, null, null, null, null, null, null, null], ['pawn', 'pawn', 'pawn', 'pawn', 'pawn', 'pawn', 'pawn', 'pawn'], ['rook', 'knight', 'bishop', 'queen', 'king', 'bishop', 'knight', 'rook']];
		self.pieces = [];
		for (var row = 0; row < 8; row++) {
			for (var col = 0; col < 8; col++) {
				var piece = initialSetup[row][col];
				if (piece !== null) {
					var color = row < 2 ? 'black' : 'white';
					var chessPiece = self.addChild(new ChessPiece());
					chessPiece.init(piece, color, col, row);
					chessPiece.updatePosition(col, row);
					self.pieces.push(chessPiece);
					boardState[row][col] = {
						piece: piece,
						color: color,
						hasMoved: false
					};
				}
			}
		}
	};
	self.clearHighlights = function () {
		for (var row = 0; row < 8; row++) {
			for (var col = 0; col < 8; col++) {
				var square = self.squares[row][col];
				var isLight = (row + col) % 2 === 0;
				var newAssetId = isLight ? 'squareLight' : 'squareDark';
				// Remove only legal move indicators, not board pieces
				for (var i = square.children.length - 1; i >= 0; i--) {
					var child = square.children[i];
					if (child.name === 'legalMoveIndicator') {
						square.removeChild(child);
					}
				}
				square.tint = 0xffffff;
			}
		}
		// Remove capturable indicators from all pieces
		for (var i = 0; i < self.pieces.length; i++) {
			//{z_new}
			var piece = self.pieces[i];
			for (var j = piece.children.length - 1; j >= 0; j--) {
				var child = piece.children[j];
				if (child.name === 'captureableIndicator') {
					piece.removeChild(child);
				}
			}
		}
	};
	self.getPieceAt = function (boardX, boardY) {
		for (var i = 0; i < self.pieces.length; i++) {
			if (self.pieces[i].boardX === boardX && self.pieces[i].boardY === boardY) {
				return self.pieces[i];
			}
		}
		return null;
	};
	self.removePiece = function (piece) {
		for (var i = 0; i < self.pieces.length; i++) {
			if (self.pieces[i] === piece) {
				self.removeChild(piece);
				self.pieces.splice(i, 1);
				return;
			}
		}
	};
	self.movePiece = function (fromX, fromY, toX, toY) {
		var piece = self.getPieceAt(fromX, fromY);
		if (!piece) return false;
		var targetPiece = self.getPieceAt(toX, toY);
		if (targetPiece && targetPiece.color === piece.color) return false;
		if (targetPiece) {
			if (piece.color === 'white') {
				self.capturedBlack.push(targetPiece);
			} else {
				self.capturedWhite.push(targetPiece);
			}
			LK.effects.flashObject(targetPiece, 0xff6b6b, 200);
			self.removePiece(targetPiece);
		}
		piece.boardX = toX; //{N_new}
		piece.boardY = toY; //{O_new}
		var newX = BOARD_START_X + toX * SQUARE_SIZE + SQUARE_SIZE / 2;
		var newY = BOARD_START_Y + toY * SQUARE_SIZE + SQUARE_SIZE / 2;
		tween.to(piece, {
			x: newX,
			y: newY
		}, {
			duration: 300
		});
		piece.boardX = toX;
		piece.boardY = toY;
		piece.hasMoved = true;
		var finalPiece = piece.piece;
		// Check for pawn promotion
		if (piece.piece === 'pawn' && (piece.color === 'white' && toY === 0 || piece.color === 'black' && toY === 7)) {
			finalPiece = 'queen';
			piece.piece = 'queen';
			piece.assetId = 'queen' + (piece.color === 'white' ? 'White' : 'Black');
			// Update the visual representation
			for (var i = piece.children.length - 1; i >= 0; i--) {
				piece.removeChild(piece.children[i]);
			} //{promo_clear}
			var newGraphics = piece.attachAsset(piece.assetId, {
				anchorX: 0.5,
				anchorY: 0.5
			}); //{promo_asset}
			tween.to(piece, {
				scaleX: 1.2,
				scaleY: 1.2
			}, {
				duration: 100,
				onComplete: function onComplete() {
					tween.to(piece, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 100
					});
				}
			});
		} //{promo_end}
		// Check for pawn promotion
		var promotedPiece = piece.piece;
		if (piece.piece === 'pawn' && (piece.color === 'white' && toY === 0 || piece.color === 'black' && toY === 7)) {
			promotedPiece = 'queen';
			piece.piece = 'queen';
			// Update the visual asset
			self.removeChild(piece);
			piece = self.addChild(new ChessPiece());
			piece.init('queen', piece.color === 'white' ? 'white' : piece.color === 'black' ? 'black' : 'white', toX, toY);
			piece.updatePosition(toX, toY);
			piece.hasMoved = true;
			self.pieces[self.pieces.indexOf(self.getPieceAt(toX, toY))] = piece;
		}
		boardState[toY][toX] = _defineProperty(_defineProperty({
			piece: finalPiece
		}, "piece", promotedPiece), "color", piece.color);
		boardState[fromY][fromX] = null;
		self.moveHistory.push({
			from: {
				x: fromX,
				y: fromY
			},
			to: {
				x: toX,
				y: toY
			},
			color: piece.color,
			captured: targetPiece ? targetPiece.piece : null
		});
		return true;
	};
	self.resetBoard = function () {
		for (var i = self.pieces.length - 1; i >= 0; i--) {
			self.removeChild(self.pieces[i]);
		}
		self.pieces = [];
		self.moveHistory = [];
		self.capturedWhite = [];
		self.capturedBlack = [];
		boardState = Array(8).fill(null).map(function () {
			return Array(8).fill(null);
		});
		self.setupPieces();
	};
	return self;
});
var ChessPiece = Container.expand(function () {
	var self = Container.call(this);
	self.piece = null;
	self.color = null;
	self.boardX = 0;
	self.boardY = 0;
	self.assetId = null;
	self.hasMoved = false;
	self.init = function (piece, color, boardX, boardY) {
		self.piece = piece;
		self.color = color;
		self.boardX = boardX;
		self.boardY = boardY;
		self.assetId = piece + (color === 'white' ? 'White' : 'Black');
		var graphics = self.attachAsset(self.assetId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		return self;
	};
	self.updatePosition = function (boardX, boardY) {
		self.boardX = boardX;
		self.boardY = boardY;
		self.x = BOARD_START_X + boardX * SQUARE_SIZE + SQUARE_SIZE / 2;
		self.y = BOARD_START_Y + boardY * SQUARE_SIZE + SQUARE_SIZE / 2;
	};
	self.down = function (x, y, obj) {
		// Handled by game.down instead to avoid conflicts
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2d3436
});

/**** 
* Game Code
****/ 
function _typeof(o) {
	"@babel/helpers - typeof";
	return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) {
		return typeof o;
	} : function (o) {
		return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o;
	}, _typeof(o);
}
function _defineProperty(e, r, t) {
	return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, {
		value: t,
		enumerable: !0,
		configurable: !0,
		writable: !0
	}) : e[r] = t, e;
}
function _toPropertyKey(t) {
	var i = _toPrimitive(t, "string");
	return "symbol" == _typeof(i) ? i : i + "";
}
function _toPrimitive(t, r) {
	if ("object" != _typeof(t) || !t) return t;
	var e = t[Symbol.toPrimitive];
	if (void 0 !== e) {
		var i = e.call(t, r || "default");
		if ("object" != _typeof(i)) return i;
		throw new TypeError("@@toPrimitive must return a primitive value.");
	}
	return ("string" === r ? String : Number)(t);
}
var SQUARE_SIZE = 128;
var BOARD_START_X = (2048 - 8 * SQUARE_SIZE) / 2;
var BOARD_START_Y = (2732 - 8 * SQUARE_SIZE) / 2 - 100;
var gameMode = 'ai'; // 'ai' or 'multiplayer'
var aiDifficulty = 1; // 0 = easy, 1 = medium, 2 = hard
var currentPlayer = 'white';
var selectedPiece = null;
var gameOver = false;
var gameResult = null; // 'checkmate', 'stalemate', 'draw', 'resignation'
var board = null;
var boardState = Array(8).fill(null).map(function () {
	return Array(8).fill(null);
});
var statusText = new Text2('White to move', {
	size: 60,
	fill: '#ffffff'
});
statusText.anchor.set(0.5, 0);
statusText.x = 1024;
statusText.y = BOARD_START_Y - 120;
game.addChild(statusText);
var moveCountText = new Text2('Moves: 0', {
	size: 40,
	fill: '#ffffff'
});
moveCountText.anchor.set(0, 0);
moveCountText.x = 50;
moveCountText.y = 50;
game.addChild(moveCountText);
var eloText = new Text2('ELO: ' + storage.elo, {
	size: 40,
	fill: '#ffffff'
});
eloText.anchor.set(1, 0);
eloText.x = 1998;
eloText.y = 50;
game.addChild(eloText);
function initializeGame() {
	if (board) {
		game.removeChild(board);
	}
	boardState = Array(8).fill(null).map(function () {
		return Array(8).fill(null);
	});
	currentPlayer = 'white';
	selectedPiece = null;
	gameOver = false;
	gameResult = null;
	board = game.addChild(new ChessBoard());
	board.init();
	statusText.setText('White to move');
	moveCountText.setText('Moves: 0');
}
function getPieceValue(piece) {
	var values = {
		'pawn': 1,
		'knight': 3,
		'bishop': 3,
		'rook': 5,
		'queen': 9,
		'king': 999
	};
	return values[piece] || 0;
}
function isSquareAttacked(boardX, boardY, byColor) {
	for (var row = 0; row < 8; row++) {
		for (var col = 0; col < 8; col++) {
			var state = boardState[row][col];
			if (state && state.color === byColor) {
				var legalMoves = calculateLegalMoves(col, row);
				for (var i = 0; i < legalMoves.length; i++) {
					if (legalMoves[i].x === boardX && legalMoves[i].y === boardY) {
						return true;
					}
				}
			}
		}
	}
	return false;
}
function calculateLegalMoves(fromX, fromY) {
	var moves = [];
	var state = boardState[fromY][fromX];
	if (!state) return moves;
	var piece = state.piece;
	var color = state.color;
	var possibleMoves = [];
	if (piece === 'pawn') {
		var direction = color === 'white' ? -1 : 1;
		var startRow = color === 'white' ? 6 : 1;
		var forwardY = fromY + direction;
		if (forwardY >= 0 && forwardY < 8 && !boardState[forwardY][fromX]) {
			possibleMoves.push({
				x: fromX,
				y: forwardY
			});
			if (fromY === startRow && !boardState[fromY + 2 * direction][fromX]) {
				possibleMoves.push({
					x: fromX,
					y: fromY + 2 * direction
				});
			}
		}
		for (var dx = -1; dx <= 1; dx += 2) {
			var captureX = fromX + dx;
			var captureY = fromY + direction;
			if (captureX >= 0 && captureX < 8 && captureY >= 0 && captureY < 8) {
				var target = boardState[captureY][captureX];
				if (target && target.color !== color) {
					possibleMoves.push({
						x: captureX,
						y: captureY
					});
				}
			}
		}
	} else if (piece === 'rook' || piece === 'queen') {
		var directions = [[0, 1], [0, -1], [1, 0], [-1, 0]];
		for (var d = 0; d < directions.length; d++) {
			for (var i = 1; i < 8; i++) {
				var newX = fromX + directions[d][0] * i;
				var newY = fromY + directions[d][1] * i;
				if (newX < 0 || newX >= 8 || newY < 0 || newY >= 8) break;
				var target = boardState[newY][newX];
				if (!target) {
					possibleMoves.push({
						x: newX,
						y: newY
					});
				} else {
					if (target.color !== color) {
						possibleMoves.push({
							x: newX,
							y: newY
						});
					}
					break;
				}
			}
		}
	}
	if (piece === 'bishop' || piece === 'queen') {
		var directions = [[1, 1], [1, -1], [-1, 1], [-1, -1]];
		for (var d = 0; d < directions.length; d++) {
			for (var i = 1; i < 8; i++) {
				var newX = fromX + directions[d][0] * i;
				var newY = fromY + directions[d][1] * i;
				if (newX < 0 || newX >= 8 || newY < 0 || newY >= 8) break;
				var target = boardState[newY][newX];
				if (!target) {
					possibleMoves.push({
						x: newX,
						y: newY
					});
				} else {
					if (target.color !== color) {
						possibleMoves.push({
							x: newX,
							y: newY
						});
					}
					break;
				}
			}
		}
	}
	if (piece === 'knight') {
		var knightMoves = [[2, 1], [2, -1], [-2, 1], [-2, -1], [1, 2], [1, -2], [-1, 2], [-1, -2]];
		for (var i = 0; i < knightMoves.length; i++) {
			var newX = fromX + knightMoves[i][0];
			var newY = fromY + knightMoves[i][1];
			if (newX >= 0 && newX < 8 && newY >= 0 && newY < 8) {
				var target = boardState[newY][newX];
				if (!target || target.color !== color) {
					possibleMoves.push({
						x: newX,
						y: newY
					});
				}
			}
		}
	}
	if (piece === 'king') {
		for (var dx = -1; dx <= 1; dx++) {
			for (var dy = -1; dy <= 1; dy++) {
				if (dx === 0 && dy === 0) continue;
				var newX = fromX + dx;
				var newY = fromY + dy;
				if (newX >= 0 && newX < 8 && newY >= 0 && newY < 8) {
					var target = boardState[newY][newX];
					if (!target || target.color !== color) {
						possibleMoves.push({
							x: newX,
							y: newY
						});
					}
				}
			}
		}
		if (!state.hasMoved) {
			if (fromX === 4 && (fromY === 0 || fromY === 7)) {
				var rook = board.getPieceAt(7, fromY);
				if (rook && rook.piece === 'rook' && !rook.hasMoved && !boardState[fromY][5] && !boardState[fromY][6]) {
					possibleMoves.push({
						x: 6,
						y: fromY
					});
				}
				rook = board.getPieceAt(0, fromY);
				if (rook && rook.piece === 'rook' && !rook.hasMoved && !boardState[fromY][1] && !boardState[fromY][2] && !boardState[fromY][3]) {
					possibleMoves.push({
						x: 2,
						y: fromY
					});
				}
			}
		}
	}
	var opponentColor = color === 'white' ? 'black' : 'white';
	for (var i = possibleMoves.length - 1; i >= 0; i--) {
		var move = possibleMoves[i];
		var originalState = boardState[move.y][move.x];
		boardState[move.y][move.x] = state;
		boardState[fromY][fromX] = null;
		var kingPos = findKing(color);
		if (!kingPos) {
			//{3s_new_fixed}
			boardState[fromY][fromX] = state;
			boardState[move.y][move.x] = originalState;
			continue;
		}
		var isInCheck = false;
		for (var row = 0; row < 8; row++) {
			for (var col = 0; col < 8; col++) {
				var checkState = boardState[row][col];
				if (checkState && checkState.color === opponentColor) {
					var dx = Math.abs(col - kingPos.x);
					var dy = Math.abs(row - kingPos.y);
					var canAttack = false;
					if (checkState.piece === 'pawn') {
						var direction = checkState.color === 'white' ? -1 : 1;
						canAttack = dy === 1 && dx === 1 && row + direction === kingPos.y;
					} else if (checkState.piece === 'knight') {
						canAttack = dx === 2 && dy === 1 || dx === 1 && dy === 2;
					} else if (checkState.piece === 'king') {
						canAttack = dx <= 1 && dy <= 1;
					} else if (checkState.piece === 'rook' || checkState.piece === 'queen') {
						if (row === kingPos.y) {
							var minCol = Math.min(col, kingPos.x);
							var maxCol = Math.max(col, kingPos.x);
							canAttack = true;
							for (var c = minCol + 1; c < maxCol; c++) {
								if (boardState[row][c]) canAttack = false;
							}
						} else if (col === kingPos.x) {
							var minRow = Math.min(row, kingPos.y);
							var maxRow = Math.max(row, kingPos.y);
							canAttack = true;
							for (var r = minRow + 1; r < maxRow; r++) {
								if (boardState[r][col]) canAttack = false;
							}
						}
					}
					if (checkState.piece === 'bishop' || checkState.piece === 'queen') {
						if (dx === dy && dx > 0) {
							canAttack = true;
							var stepX = col < kingPos.x ? 1 : -1;
							var stepY = row < kingPos.y ? 1 : -1;
							var checkCol = col + stepX;
							var checkRow = row + stepY;
							while (checkCol !== kingPos.x || checkRow !== kingPos.y) {
								if (boardState[checkRow][checkCol]) canAttack = false;
								checkCol += stepX;
								checkRow += stepY;
							}
						}
					}
					if (canAttack) {
						isInCheck = true;
						break;
					}
				}
			}
			if (isInCheck) break;
		}
		boardState[fromY][fromX] = state;
		boardState[move.y][move.x] = originalState;
		if (!isInCheck) {
			moves.push(move);
		}
	}
	return moves;
}
function findKing(color) {
	for (var row = 0; row < 8; row++) {
		for (var col = 0; col < 8; col++) {
			var state = boardState[row][col];
			if (state && state.piece === 'king' && state.color === color) {
				return {
					x: col,
					y: row
				};
			}
		}
	}
	return null;
}
function isInCheck(color) {
	var kingPos = findKing(color);
	if (!kingPos) return false; //{3F_new}
	var opponentColor = color === 'white' ? 'black' : 'white';
	return isSquareAttacked(kingPos.x, kingPos.y, opponentColor);
}
function hasLegalMoves(color) {
	for (var row = 0; row < 8; row++) {
		for (var col = 0; col < 8; col++) {
			var state = boardState[row][col];
			if (state && state.color === color) {
				var legalMoves = calculateLegalMoves(col, row);
				if (legalMoves.length > 0) {
					return true;
				}
			}
		}
	}
	return false;
}
function calculateELOChange(playerWins) {
	var K = 32;
	var playerELO = storage.elo;
	var opponentELO = 1600;
	var playerExpected = 1 / (1 + Math.pow(10, (opponentELO - playerELO) / 400));
	var eloChange = K * (playerWins ? 1 : 0) - K * playerExpected;
	return Math.round(eloChange);
}
function updateELO(playerWins) {
	var eloChange = calculateELOChange(playerWins);
	storage.elo = Math.max(800, storage.elo + eloChange);
	eloText.setText('ELO: ' + storage.elo);
}
function highlightLegalMoves(piece) {
	board.clearHighlights();
	// Animate piece selection with scale effect
	tween.to(piece, {
		scaleX: 1.15,
		scaleY: 1.15
	}, {
		duration: 200
	});
	// Show red indicator behind black pieces to show they can be captured
	if (piece.color === 'black') {
		var captureIndicator = LK.getAsset('captureableIndicator', {
			anchorX: 0.5,
			//{4j_new}
			anchorY: 0.5 //{4k_new}
		}); //{4l_new}
		captureIndicator.name = 'captureableIndicator';
		captureIndicator.x = 0;
		captureIndicator.y = 0;
		piece.addChild(captureIndicator);
	}
	var legalMoves = calculateLegalMoves(piece.boardX, piece.boardY);
	for (var i = 0; i < legalMoves.length; i++) {
		var move = legalMoves[i];
		var square = board.squares[move.y][move.x];
		var targetPiece = board.getPieceAt(move.x, move.y);
		var isCapture = targetPiece !== null;
		var assetId = isCapture ? 'captureableIndicator' : 'legalMoveIndicator';
		var indicator = LK.getAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		indicator.name = 'legalMoveIndicator';
		indicator.x = SQUARE_SIZE / 2;
		indicator.y = SQUARE_SIZE / 2;
		square.addChild(indicator);
	}
}
function makeAIMove() {
	var possibleMoves = [];
	for (var row = 0; row < 8; row++) {
		for (var col = 0; col < 8; col++) {
			var state = boardState[row][col];
			if (state && state.color === 'black') {
				var legalMoves = calculateLegalMoves(col, row);
				for (var i = 0; i < legalMoves.length; i++) {
					possibleMoves.push({
						fromX: col,
						fromY: row,
						toX: legalMoves[i].x,
						toY: legalMoves[i].y
					});
				}
			}
		}
	}
	if (possibleMoves.length === 0) return false;
	var move = null;
	if (aiDifficulty === 0) {
		move = possibleMoves[Math.floor(Math.random() * possibleMoves.length)];
	} else if (aiDifficulty === 1) {
		var bestScore = -999999;
		for (var i = 0; i < possibleMoves.length; i++) {
			var m = possibleMoves[i];
			var targetState = boardState[m.toY][m.toX];
			var score = targetState ? getPieceValue(targetState.piece) : 0;
			if (Math.random() < 0.7) {
				score += Math.random() * 15;
			}
			if (score > bestScore) {
				bestScore = score;
				move = m;
			}
		}
	} else {
		var bestScore = -999999;
		for (var i = 0; i < possibleMoves.length; i++) {
			var m = possibleMoves[i];
			var targetState = boardState[m.toY][m.toX];
			var score = targetState ? getPieceValue(targetState.piece) : 0;
			var piece = boardState[m.fromY][m.fromX];
			var attackers = 0;
			var defenders = 0;
			for (var row = 0; row < 8; row++) {
				for (var col = 0; col < 8; col++) {
					var state = boardState[row][col];
					if (state) {
						var attacks = calculateLegalMoves(col, row);
						for (var j = 0; j < attacks.length; j++) {
							if (attacks[j].x === m.toX && attacks[j].y === m.toY) {
								if (state.color === 'black') defenders++;else attackers++;
							}
						}
					}
				}
			}
			if (defenders > attackers) {
				score = -getPieceValue(piece.piece);
			}
			if (score > bestScore) {
				bestScore = score;
				move = m;
			}
		}
	}
	if (move) {
		board.movePiece(move.fromX, move.fromY, move.toX, move.toY);
		return true;
	}
	return false;
}
function switchPlayer() {
	currentPlayer = currentPlayer === 'white' ? 'black' : 'white';
	board.clearHighlights();
	statusText.setText(currentPlayer === 'white' ? 'White to move' : 'Black to move');
	if (isInCheck(currentPlayer)) {
		statusText.setText((currentPlayer === 'white' ? 'White' : 'Black') + ' in check');
		LK.getSound('checkSound').play();
		LK.effects.flashScreen(0xff6b6b, 300);
	}
	if (!hasLegalMoves(currentPlayer)) {
		if (isInCheck(currentPlayer)) {
			gameOver = true;
			gameResult = 'checkmate';
			var whiteWins = currentPlayer === 'black';
			updateELO(whiteWins);
			statusText.setText((currentPlayer === 'white' ? 'Black' : 'White') + ' wins by checkmate');
			LK.showGameOver();
		} else {
			gameOver = true;
			gameResult = 'stalemate';
			var eloChange = calculateELOChange(false);
			storage.elo = Math.max(800, storage.elo + Math.round(eloChange * 0.5));
			eloText.setText('ELO: ' + storage.elo);
			statusText.setText('Draw - Stalemate');
			LK.showGameOver();
		}
		return;
	}
	if (gameMode === 'ai' && currentPlayer === 'black' && !gameOver) {
		LK.setTimeout(function () {
			if (!gameOver && currentPlayer === 'black') {
				makeAIMove();
				switchPlayer();
			}
		}, 500);
	}
}
game.move = function (x, y, obj) {
	if (gameOver || !selectedPiece) return;
};
game.down = function (x, y, obj) {
	if (gameOver) return;
	var boardX = Math.floor((x - BOARD_START_X) / SQUARE_SIZE);
	var boardY = Math.floor((y - BOARD_START_Y) / SQUARE_SIZE);
	if (boardX < 0 || boardX >= 8 || boardY < 0 || boardY >= 8) return;
	if (selectedPiece) {
		var legalMoves = calculateLegalMoves(selectedPiece.boardX, selectedPiece.boardY);
		var isLegalMove = false;
		for (var i = 0; i < legalMoves.length; i++) {
			if (legalMoves[i].x === boardX && legalMoves[i].y === boardY) {
				isLegalMove = true;
				break;
			}
		}
		if (isLegalMove) {
			var targetPiece = board.getPieceAt(boardX, boardY);
			var isCaptured = targetPiece !== null;
			board.movePiece(selectedPiece.boardX, selectedPiece.boardY, boardX, boardY);
			if (isCaptured) {
				LK.getSound('capture').play();
			} else {
				LK.getSound('move').play();
			}
			moveCountText.setText('Moves: ' + board.moveHistory.length);
			board.clearHighlights();
			tween.to(selectedPiece, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 150
			});
			selectedPiece = null;
			switchPlayer();
		} else {
			var newPiece = board.getPieceAt(boardX, boardY);
			if (newPiece && newPiece.color === currentPlayer) {
				tween.to(selectedPiece, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 150
				});
				selectedPiece = newPiece;
				board.clearHighlights();
				highlightLegalMoves(newPiece);
			} else {
				tween.to(selectedPiece, {
					scaleX: 1,
					scaleY: 1
				}, {
					duration: 150
				});
				selectedPiece = null;
				board.clearHighlights();
			}
		}
	} else {
		var piece = board.getPieceAt(boardX, boardY);
		if (piece && piece.color === currentPlayer) {
			selectedPiece = piece;
			highlightLegalMoves(piece);
		}
	}
};
game.up = function (x, y, obj) {};
game.update = function () {};
initializeGame();
LK.playMusic('bgmusic', {
	loop: true
});

===================================================================
--- original.js
+++ change.js
@@ -126,9 +126,11 @@
 		var newY = BOARD_START_Y + toY * SQUARE_SIZE + SQUARE_SIZE / 2;
 		tween.to(piece, {
 			x: newX,
 			y: newY
-		}, 300);
+		}, {
+			duration: 300
+		});
 		piece.boardX = toX;
 		piece.boardY = toY;
 		piece.hasMoved = true;
 		var finalPiece = piece.piece;
@@ -147,13 +149,18 @@
 			}); //{promo_asset}
 			tween.to(piece, {
 				scaleX: 1.2,
 				scaleY: 1.2
-			}, 100, function () {
-				tween.to(piece, {
-					scaleX: 1,
-					scaleY: 1
-				}, 100);
+			}, {
+				duration: 100,
+				onComplete: function onComplete() {
+					tween.to(piece, {
+						scaleX: 1,
+						scaleY: 1
+					}, {
+						duration: 100
+					});
+				}
 			});
 		} //{promo_end}
 		// Check for pawn promotion
 		var promotedPiece = piece.piece;
@@ -618,9 +625,11 @@
 	// Animate piece selection with scale effect
 	tween.to(piece, {
 		scaleX: 1.15,
 		scaleY: 1.15
-	}, 200);
+	}, {
+		duration: 200
+	});
 	// Show red indicator behind black pieces to show they can be captured
 	if (piece.color === 'black') {
 		var captureIndicator = LK.getAsset('captureableIndicator', {
 			anchorX: 0.5,
@@ -789,26 +798,32 @@
 			board.clearHighlights();
 			tween.to(selectedPiece, {
 				scaleX: 1,
 				scaleY: 1
-			}, 150);
+			}, {
+				duration: 150
+			});
 			selectedPiece = null;
 			switchPlayer();
 		} else {
 			var newPiece = board.getPieceAt(boardX, boardY);
 			if (newPiece && newPiece.color === currentPlayer) {
 				tween.to(selectedPiece, {
 					scaleX: 1,
 					scaleY: 1
-				}, 150);
+				}, {
+					duration: 150
+				});
 				selectedPiece = newPiece;
 				board.clearHighlights();
 				highlightLegalMoves(newPiece);
 			} else {
 				tween.to(selectedPiece, {
 					scaleX: 1,
 					scaleY: 1
-				}, 150);
+				}, {
+					duration: 150
+				});
 				selectedPiece = null;
 				board.clearHighlights();
 			}
 		}