Learn How to Back Rank Mate: Mate in 2
This puzzle is a classic middlegame tactical refutation built around king safety and a back rank weakness. White’s active rook and knight coordinate against the black king, which has limited escape squares and a vulnerable back rank. The key idea is to use a forcing check that also creates a discovered attack on the rook line, leaving the defender with only one reply before the final mating move lands. It is a clean example of how piece activity can outweigh material.