Escalator Mate Puzzle (Rated 733): Spot Mate in 2 — Queen Sacrifice

This puzzle is a classic forcing finish in a sharp middlegame/endgame setting where king safety matters more than material. White’s queen and bishop work together to create an exposed king net, and the key idea is to use a forcing check that limits the defender’s replies. The position shows how a seemingly active black setup can collapse when the king has no safe squares and the checking piece is supported by a hidden tactical resource.