yep

Gameboard.ShogiUI.Sockets/Controllers/GameController.cs

@@ -100,7 +100,7 @@ namespace Gameboard.ShogiUI.Sockets.Controllers
           PlayerName = user.Name,
           Move = moveModel.ToServiceModel()
         }, session.Player1, session.Player2);
-        return Ok();
+        return Created(string.Empty, null);
       }
       throw new InvalidOperationException("Illegal move.");
     }