Learn How to Spot Mate in 1: Old Indian Defense
This puzzle comes from the Old Indian Defense and shows how a quiet-looking middlegame can hide a forcing finish. The key idea is that king safety matters more than material when the enemy king is exposed and the pieces are coordinated for a direct attack. In positions like this, a single checking move can end the game immediately if the defender has no safe squares, captures, or interpositions. It is a classic example of a mating net turning into a forced checkmate.