Learn How to Spot Mate in 1: Queen Sacrifice
This London System puzzle is a classic middlegame mating net where White’s queen and knight coordinate against an exposed king. The key idea is not material, but king safety: once the enemy king’s shelter is weakened, forcing checks can become decisive immediately. In positions like this, look for direct threats on f7 and nearby dark squares, especially when major pieces are already active and the opponent’s pieces are cramped or pinned.