checkmate by a dropped pawn (illegal move)
A shogi rule: delivering checkmate by dropping a pawn is illegal. The term refers to the forbidden move itself.
In shogi, checkmate by a dropped pawn results in an illegal-move loss.
Beginners must be careful not to commit an illegal pawn-drop checkmate.
反則 is a general term for a foul or illegal move; 打ち歩詰め is one specific type of foul in shogi.
Standard full spelling for this shogi term.
Abbreviated spelling; common in shogi contexts.
Compound of 打ち (dropping, from 打つ 'to drop a piece'), 歩 (pawn), and 詰め (checkmate). The term is specific to shogi.