Send stop inconditonnaly

chess_uci/src/lib.rs

@@ -365,14 +365,9 @@ impl<Fi: Read, Fo: Write> UciEngine<Fi, Fo> {
         }
     }
     pub fn stop(&mut self) -> Result<(), &'static str> {
-        match self.player[self.side_to_move().to_index()] {
-            Player::Human { .. } => Err("Not a machine to play for current color."),
-            Player::Engine { .. } => {
         self.push(GuiCommand::Stop);
         Ok(())
     }
-        }
-    }
 }
 
 use chess::{Color, Piece, Square};