Learn How to Spot Swallowtail Mate: Mate in 1
This puzzle is a classic middlegame mating net where king safety matters more than material. White’s pieces are already aimed at the enemy king, and the key idea is to notice how the queen can exploit the weakened dark squares around the black king. In positions like this, the strongest move is often a forcing check that cannot be met by capture, block, or escape. That is the essence of a one-move tactical finish.