Checkmate
A king is trapped between two of its own pieces — usually rooks — that block its sideways escape squares, so a queen delivering a frontal attack is fatal.
A checkmate where the king is trapped between two of its own pieces, usually rooks, which sit on either side of it like ornamental shoulder pads (epaulettes). Because the friendly pieces block the sideways escape squares, a direct frontal assault by a queen is fatal.
Starting Position (FEN): 3rkr2/8/8/5Q2/8/8/8/7K w - - 0 1
Move Sequence: Qe6#
Explanation: A checkmate where the king is trapped between two of its own pieces, usually rooks, which sit on either side of it like ornamental shoulder pads (epaulettes). Because the friendly pieces block the sideways escape squares, a direct frontal assault by a queen is fatal.
Starting Position (FEN): 8/8/7r/7k/7r/8/5Q2/6K1 w - - 0 1
Move Sequence: Qf5#
Explanation: The epaulette pattern can occur on any edge of the board, trapping the king between its own pieces vertically as well as horizontally.
Starting Position (FEN): 3rkr2/8/8/6Q1/7B/8/8/7K w - - 0 1
Move Sequence: Qe7#
Explanation: The queen can deliver the epaulette mate directly in front of the king — often uncapturable — when supported by another piece like a bishop on the long diagonal.
The visual similarity to the ornamental shoulder pieces worn on military uniforms gives this checkmate its name. It often appears in endgames where a king is trying to hide behind its defending rooks.
See also:Back-Rank Mate·Smothered Mate