new method to get the last move to undo the last move after

src/backend/Board.java

@@ -262,7 +262,12 @@ public class Board {
 	    return false;
 	}
 
-	public void undoLastMove() {
+	public void getLastMove (int x, int y) {// it saves the current state before making a move
+	      
+	      previousStates.add(new Board(this)); // Use the existing constructor to create a copy
+	}
+	
+	public void undoLastMove() { 
 		
 		
 	}