Nils Grandelius (White) Puzzle: Mate in 3 — Queen Net

A mating net works when the attacking pieces cover every square around an exposed king. Here, White’s queen and active bishop coordinate on complementary lines, while Black’s own pieces restrict vital escape routes. The combination begins by removing a dangerous defender and accepting a forcing recapture, allowing the queen to collect a key defender with tempo. The final attack is a precise queen-and-bishop pattern: the queen checks from a protected square and the bishop supplies the crucial support.