David Bronstein (Black) Puzzle: Mate — Mating Net

A mating net is created when attacking pieces restrict every safe square around the enemy king before the final check arrives. In this chess endgame, Black’s bishop, knight, king, and kingside pawns coordinate against an exposed white king. The important idea is not a series of checks, but a precise improving move that takes away a key escape square and makes the pawn thrust decisive. This is classical chess coordination at its most concrete: every defender and flight square matters.