Modern Defense Mongredien Defense Puzzle (Rated 1211): Crush a Pin — Middlegame Tactics

This middlegame puzzle shows how a well-timed bishop move can create a crushing pin and force a decisive tactical sequence. The key idea is that an exposed queen and an uncoordinated king can be overloaded at once, especially when a bishop gains a strong diagonal and the defender has limited squares. In classical chess, these patterns often arise from piece activity and king safety rather than a direct attack on the king itself.