What is Epaulette Mate?

Epaulette Mate refers to a checkmate pattern in a game of chess. It occurs when the player's king is trapped between two of their own pieces, typically their own rooks or queens, on its original file. The checkmate is delivered by two attacking pieces, one on each side, with no room for the king to escape. The term epaulette is used to describe this situation as the position of the pieces resembles the ornamental shoulder pieces found on military uniforms.