diff --git a/kifu/kifu-core/src/types.rs b/kifu/kifu-core/src/types.rs
index 3b43d16..912632f 100644
--- a/kifu/kifu-core/src/types.rs
+++ b/kifu/kifu-core/src/types.rs
@@ -127,7 +127,6 @@ impl GameState {
         let board = self.board.clone();
         let new_board = board.place_stone(coordinate, self.current_player)?;
 
-        println!("past positions: {}", self.past_positions.len());
         if self.past_positions.contains(&new_board) {
             return Err(BoardError::Ko);
         }