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Yujie AI/Yujie AI.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

Yujie AI/src/Board.java

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+public class Board {
+    public getAllLegalMoves(){
+
+    }
+    public makeMove(){
+
+    }
+
+    public undoMove(){
+
+    }
+
+    public isGameover(){
+
+    }
+
+    public
+}

Yujie AI/src/ChessAI.java

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+public class ChessAI {
+    private final int MAX_DEPTH = 4;
+
+    public Move findBestMove(Board board) {
+        int bestScore = Integer.MIN_VALUE;
+        Move bestMove = null;
+
+        for (Move move : board.getAllLegalMoves()) {
+            board.makeMove(move);
+            int score = minimax(board, MAX_DEPTH, Integer.MIN_VALUE, Integer.MAX_VALUE, false);
+            board.undoMove();
+
+            if (score > bestScore) {
+                bestScore = score;
+                bestMove = move;
+            }
+        }
+
+        return bestMove;
+    }
+
+    private int minimax(Board board, int depth, int alpha, int beta, boolean maximizingPlayer) {
+        if (depth == 0 || board.isGameOver()) {
+            return evaluateBoard(board);
+        }
+
+        int score;
+        if (maximizingPlayer) {
+            score = Integer.MIN_VALUE;
+            for (Move move : board.getAllLegalMoves()) {
+                board.makeMove(move);
+                score = Math.max(score, minimax(board, depth - 1, alpha, beta, false));
+                board.undoMove();
+                alpha = Math.max(alpha, score);
+                if (beta <= alpha) {
+                    break;
+                }
+            }
+        } else {
+            score = Integer.MAX_VALUE;
+            for (Move move : board.getAllLegalMoves()) {
+                board.makeMove(move);
+                score = Math.min(score, minimax(board, depth - 1, alpha, beta, true));
+                board.undoMove();
+                beta = Math.min(beta, score);
+                if (beta <= alpha) {
+                    break;
+                }
+            }
+        }
+
+        return score;
+    }
+
+    private int evaluateBoard(Board board) {
+        int score = 0;
+        for (Piece piece : board.getPieces()) {
+            if (piece.getColor() == Color.WHITE) {
+                score += piece.getValue();
+            } else {
+                score -= piece.getValue();
+            }
+        }
+        return score;
+    }
+}
+

Yujie AI/src/Color.java

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+public class Color {
+}

Yujie AI/src/Move.java

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+public class Move {
+}

Yujie AI/src/Piece.java

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+public class Piece {
+}