Learn How to Spot Mate in 1: Swallowtail Mate
This puzzle comes from the King’s Pawn Game and shows a classic middlegame mating pattern where king safety collapses fast. White’s pieces are active, but the key lesson is that Black’s king is exposed and vulnerable to a forcing finish. In positions like this, look for checks first, then examine whether the enemy king has any escape squares, captures, or blocks. When those defenses disappear, a one-move mate can appear even if the material balance looks normal.