我正在尝试使用Minimax算法为黑白棋实现一个人工智能玩家。电脑的表现还不错,但并不是很好。请问我在下面的代码中是否正确实现了它?
Coordinate bestCoordinate = null;
public int minimax(MyButton[][] gameBoard, int depth, boolean maximizingPlayer) {
if (depth == 0) {
return evaluateBoard(gameBoard);
}
if (maximizingPlayer) {
int bestValue = Integer.MIN_VALUE;
LinkedList<Coordinate> moves = generateMoves(gameBoard);
for (Coordinate move : moves) {
MyButton[][] newBoard = cloneBoard(gameBoard);
processMove(newBoard, newBoard[move.getxCoordinate()][move.getyCoordinate()]);
int v = minimax(newBoard, depth - 1, !maximizingPlayer);
if (v > bestValue) {
bestValue = v;
bestCoordinate = move;
}
}
return bestValue;
}
else {
int bestValue = Integer.MAX_VALUE;
LinkedList<Coordinate> moves = generateMoves(gameBoard);
for (Coordinate move : moves) {
MyButton[][] newBoard = cloneBoard(gameBoard);
processMove(newBoard, newBoard[move.getxCoordinate()][move.getyCoordinate()]);
int v = minimax(newBoard, depth - 1, !maximizingPlayer);
if (v < bestValue) {
bestValue = v;
bestCoordinate = move;
}
}
return bestValue;
}
}
此外,这是我的评估函数:
public int evaluateBoard(MyButton[][] gameBoard) {
int blackPieces = 0;
int whitePiecess = 0;
for (MyButton[] array : gameBoard) {
for (MyButton button : array) {
if (button.getBackground().equals(Color.black)) {
blackPieces++;
} else if (button.getBackground().equals(Color.WHITE)) {
whitePiecess++;
}
}
}
int cornerBonus = 10;
if (gameBoard[0][0].getBackground().equals(Color.BLACK)) {
blackPieces += cornerBonus;
}
if (gameBoard[0][getBoardWidth() - 1].getBackground().equals(Color.BLACK)) {
blackPieces += cornerBonus;
}
if (gameBoard[getBoardHeight() - 1][0].getBackground().equals(Color.BLACK)) {
blackPieces += cornerBonus;
}
if (gameBoard[getBoardHeight() - 1][getBoardWidth() - 1].getBackground().equals(Color.BLACK)) {
blackPieces += cornerBonus;
}
if (gameBoard[0][0].getBackground().equals(Color.WHITE)) {
whitePiecess += cornerBonus;
}
if (gameBoard[0][getBoardWidth() - 1].getBackground().equals(Color.WHITE)) {
whitePiecess += cornerBonus;
}
if (gameBoard[getBoardHeight() - 1][0].getBackground().equals(Color.WHITE)) {
whitePiecess += cornerBonus;
}
if (gameBoard[getBoardHeight() - 1][getBoardWidth() - 1].getBackground().equals(Color.WHITE)) {
whitePiecess += cornerBonus;
}
return whitePiecess - blackPieces;
}
电脑总是执白先手,而人类执黑后手。我主要不确定的是,尽管保护角落可以得到加分,但电脑似乎并没有这样做。我的代码或逻辑有什么问题吗?