Petrovs Defense Fork Puzzle (Rated 1103): Spot Back Rank Mate — Mate in 2

This puzzle comes from the Petrov's Defense, Damiano Variation and shows a classic mating net in the opening. White’s queen and rook coordinate to exploit the exposed black king, while the black queen’s active placement creates a forcing tactical sequence. The key idea is that checks can override material balance when the king has too little room. In positions like this, a seemingly strong attacking move can actually be a tactical refutation if the opponent’s king is vulnerable.