Queen attacks, bishop cuts the diagonal escape
A queen attacks the king while a bishop on a different diagonal cuts off the king's only flight square. The two pieces work like a crossbow (balestra), one piece holding the king, the other firing the killing line. Most often a queen-and-bishop pair with the bishop on a long diagonal aiming at the king's escape file.
Queen and bishop both attack the king's area from different angles.
2 more clean runs (at any point) to reach Recall.
White to move. Black king on e8. White's queen on d6 and bishop on c2 both eye the king's neighbourhood. The diagonal c2 to g6 leads straight to the king's flight square.
Queen and bishop both attack the king's area from different angles.
2 more clean runs (at any point) to reach Recall.