try to put checkmate ?

src/backend/AutoPlayer.java

@@ -68,8 +68,20 @@ public class AutoPlayer {
                         return null;
                     }
 
+                    // Prevent AI from moving into check or checkmate
+                    if (copy.isKingInCheck(isWhite) || copy.isCheckmate(isWhite)) {
+                        continue; // Skip moves that leave AI in check or checkmate
+                    }
+
+                    // Check if move results in checkmate for the opponent
+                    if (copy.isCheckmate(!isWhite)) {
+                        System.out.println("Checkmate! AutoPlayer has won.");
+                        // Optionally, return this move instead of null:
+                        // return move;
+                        return null;
+                    }
+
                     Piece enemyKing = copy.findKing(!isWhite);
-                    // Manhattan distance from this piece (after move) to enemy king
                     int dist = Math.abs(move.getToX() - enemyKing.getX()) + Math.abs(move.getToY() - enemyKing.getY());
                     int priority = -dist;
 
@@ -93,13 +105,11 @@ public class AutoPlayer {
         }
         if (bestMoves.isEmpty()) {
             System.out.println("Game Over! No legal moves for autoplayer.");
-            // Optionally: call a game over method on the board or game object here
             return null;
         }
         // Randomly pick among best moves
         Random rand = new Random();
         int idx = rand.nextInt(bestMoves.size());
-        // Set last moved piece hash for next time
         lastMovedPieceHash = movePieceHashes.get(idx);
         return bestMoves.get(idx);
     }