Nimzo Indian Defense Kingside Attack Puzzle (Rated 1400): Spot Mate in 1 — Kingside Attack
This puzzle is a classic middlegame mating pattern: one side’s pieces are already aimed at the king, and the defender’s coordination is too loose to survive a direct tactical strike. The key idea is to notice how a knight jump can exploit weak squares around the king, especially when the back rank and nearby escape squares are controlled. Even with material advantage on the board, king safety can decide the game immediately when the attack is fully coordinated.