Queens Gambit Accepted Central Variation Mate In 1 Puzzle (Rated 902): Spot Mate in 1 — Queen's Gambit Accepted

This middlegame puzzle comes from the Queen's Gambit Accepted, Central Variation, where open lines and king safety matter more than material. White has a powerful passed pawn on c6 and active pieces, but the real story is tactical: Black’s king is exposed and the back rank is vulnerable. In positions like this, a single forcing move can end the game immediately if it creates an unavoidable checkmate pattern.