diff --git a/board/src/position/position.rs b/board/src/position/position.rs
index a307b71..d45fd1d 100644
--- a/board/src/position/position.rs
+++ b/board/src/position/position.rs
@@ -212,12 +212,15 @@ impl Position {
 
     pub(crate) fn is_king_in_check(&self) -> bool {
         let sight_of_opposing_player = self.sight_of_player(self.color_to_move.other());
-        let king_square = self
-            .bitboard_for_piece(Piece::king(self.color_to_move))
+        sight_of_opposing_player.is_set(self.king_square())
+    }
+
+    fn king_square(&self) -> Square {
+        self.bitboard_for_piece(Piece::king(self.color_to_move))
             .occupied_squares()
             .next()
-            .unwrap();
-        sight_of_opposing_player.is_set(king_square)
+            .unwrap()
+    }
 }
 
 #[cfg(test)]