Ruy Lopez Epaulette Mate in Chess

The ruy lopez epaulette mate is a mate pattern in the Ruy Lopez where Black’s rook reaches the 7th rank and White’s king is boxed in by its own pieces. A defining feature is that White’s rook (or another piece) on the back rank blocks escape squares, while the rook on e7/e1 (or the equivalent file) gives a decisive check. It’s most often seen after tactical simplifications that leave the White king with no flight squares.