expression, godan verb (-ku)
advance a pawn
Shogi term: to move a pawn forward one square. Used in shogi contexts.
彼は初手で歩を突いた。
He advanced a pawn on the first move.
Compound of 歩 (fu, 'pawn') + を (o, object marker) + 突く (tsuku, 'to push, thrust'). The verb 突く here means to move a piece forward in shogi.