Learn How to Swallowtail Mate: Mate in 1
This middlegame puzzle is a classic king-safety finish: White’s pieces are already aimed at the enemy king, and the position collapses because the king has too few safe squares. The key idea is a forcing check that cannot be met by capture, block, or escape. In tactical terms, this is a mate in 1 built on coordination, open lines, and the exposed king. Patterns like this often appear in classical chess and game review positions where one active queen decides everything.