Queens Pawn Game Back Rank Mate Beginner Puzzle (Rated 904): Spot Back Rank Mate — One-Move Finish

This puzzle comes from a Queen's Pawn Game middlegame where king safety matters more than raw material. White’s pieces are active enough to create a direct mating net, and the position shows a classic back rank weakness: the defending king has limited escape squares and the last rank is congested. In practical classical chess, these situations often arise when rooks coordinate against a boxed-in king and one forcing move ends the game immediately.