diff --git a/Scripts/Entities/ChessBoard.cs b/Scripts/Entities/ChessBoard.cs
index 7c4577f..a316423 100644
--- a/Scripts/Entities/ChessBoard.cs
+++ b/Scripts/Entities/ChessBoard.cs
@@ -9,7 +9,7 @@ public partial class ChessBoard : Node2D {
 	public override void _Ready() {
 		Board = new VirtualBoard(this as Node);
 		Records = new MoveRecords(onUndoRecordCallback: (newNode, oldNode, newPos, oldPos) => {
-			GD.Print("Undo: ", newNode, "->", newNode, ":", newPos, "->", oldPos);
+			GD.Print("Undo: ", newNode, "->", oldNode, ":", newPos, "->", oldPos);
 			ChessPiece newPiece = newNode as ChessPiece;
 			ChessPiece oldPiece = oldNode as ChessPiece;
 			Board.MoveNode(oldPos, newPos);
@@ -64,6 +64,7 @@ public partial class ChessBoard : Node2D {
 			}
 			Node NowNode;
             if (NowChess != null) {
+				GD.Print("nowchess", NowChess);
 				NowNode = NowChess.Duplicate();
                 Board.RemoveNode(clickArrPos);
             } else {
@@ -83,6 +84,7 @@ public partial class ChessBoard : Node2D {
 	public void redo() {
 		Records.Clear();
 		Board.Clear();
+		selectedNodePos = Vector2.Inf;
 		Board.InitChessBoard();
 	}
 
diff --git a/Scripts/Utilities/VirtualBoard.cs b/Scripts/Utilities/VirtualBoard.cs
index 374a296..6dbc271 100644
--- a/Scripts/Utilities/VirtualBoard.cs
+++ b/Scripts/Utilities/VirtualBoard.cs
@@ -59,6 +59,7 @@ class VirtualBoard {
 	public void Clear() {
 		foreach (var node in BoardRoot.GetChildren()) {
 			if (node is ChessPiece chessPiece) {
+				RemoveNode(chessPiece.getPos());
 				chessPiece.QueueFree();
 			}
 		}