Learn How to Spot Mate in 3: Opera Mate
This puzzle is a classic opera mate style finish: the attacking side uses forcing checks to drive the enemy king into a boxed-in corner, where escape squares are covered by heavy pieces and a bishop. The key idea is not material gain alone, but coordination and king safety. Even in a middlegame or chess endgame, a seemingly active defender can be helpless if the mating net is already built. Look for checks that force the king onto a vulnerable file or rank.