Etienne Bacrot (Black) Puzzle: Mate in 3 — Pin
A pinned piece can become the key to a mating attack. When a defender is tied to its king, capturing or challenging that piece may open decisive lines for the queen and bishop. In this position, White uses a bishop’s long-range pressure to exploit an absolute pin and restrict the black king’s escape squares. The material imbalance makes the tactical opportunity easy to overlook, but king safety and piece coordination create a forced mate in 3.