brinkmate means A situation in which an indefensible checkmate sequence will be created by the player's next move. Lexicurio rates it Sui generis — a strength score of 93 out of 100.
Why “brinkmate” is a great word
BRINKMATE — [Noun] A situation in shogi where any legal move a player makes will immediately trigger an unavoidable and indefensible checkmate sequence. From brink (meaning the edge or verge of something) + mate (short for checkmate). First attested in 1983 in a British Shogi magazine. Unlike checkmate (the conclusive, game-ending move) or stalemate (a drawn deadlock without legal moves), brinkmate is the suspended moment of absolute tactical certainty just before the finality occurs. It is the king backed against the board's edge, the loaded silence before the gunshot, and the quiet, terrible clarity with which the doomed player sees the one path left—a victory not yet secured on the board, but already won in the mind.
Etymology
From brink + mate. First attested in the British Shogi magazine in 1983.
noun
- A situation in which an indefensible checkmate sequence will be created by the player's next move.