diff --git a/Assets/Script/Renju/RenjuForbiddenMoveDetector.cs b/Assets/Script/Renju/RenjuForbiddenMoveDetector.cs
index 88e97a3..52ddf34 100644
--- a/Assets/Script/Renju/RenjuForbiddenMoveDetector.cs
+++ b/Assets/Script/Renju/RenjuForbiddenMoveDetector.cs
@@ -14,6 +14,7 @@ public class RenjuForbiddenMoveDetector
     /// <returns>금수 좌표를 담은 리스트</returns>
     public List<Vector2Int> RenjuForbiddenMove(Enums.PlayerType[,] board)
     {
+        var tempBoard = (Enums.PlayerType[,])board.Clone();
         return _ruleChecker.GetForbiddenMoves(board);
     }
 }
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