yep

Shogi.Domain/Shogi.cs

@@ -61,6 +61,7 @@
 			{
 				board.InCheck = null;
 			}
+			board.WhoseTurn = otherPlayer;
 		}
 
 		///// <summary>

Shogi.Domain/ShogiBoardState.cs

@@ -19,7 +19,7 @@ namespace Shogi.Domain
 		public List<Piece> Player1Hand { get; }
 		public List<Piece> Player2Hand { get; }
 		public List<Move> MoveHistory { get; }
-		public WhichPlayer WhoseTurn => MoveHistory.Count % 2 == 0 ? WhichPlayer.Player1 : WhichPlayer.Player2;
+		public WhichPlayer WhoseTurn { get; set; }
 		public WhichPlayer? InCheck { get; set; }
 		public bool IsCheckmate { get; set; }
 

Shogi.Domain/StandardRules.cs

@@ -51,7 +51,7 @@ namespace Shogi.Domain
 			var fromPiece = board[from];
 			if (fromPiece == null)
 			{
-				return new MoveResult(false, $"Tile [{from}] is empty. There is no piece to move.");
+				return new MoveResult(false, $"Tile [{fromNotation}] is empty. There is no piece to move.");
 			}
 
 			if (fromPiece.Owner != board.WhoseTurn)