Pin Puzzle (Rated 974): Pin — Winning Tactic
A pin becomes powerful when the pinned piece cannot move without exposing something more valuable behind it. In this middlegame, White combines a forcing check with a discovered attack from the bishop, restricting Black’s king and tying down a knight. The knight’s lack of safe squares turns the pin into a trapped-piece tactic, while White’s material advantage makes the resulting position favorable. Look for forcing moves that improve several tactical features at once.