way of playing mahjong; mahjong tactics
Refers to a player's characteristic style, approach, or tactical tendencies in mahjong. Used in mahjong commentary and discussion.
His way of playing mahjong is very aggressive.
I reviewed my own tactics by referring to a professional's mahjong style.
Compound of 打ち (uchi, 'hitting', the continuative form of 打つ 'to hit') and 筋 (suji, 'line, path, logic'). Literally 'line of play', it came to refer to a player's characteristic mahjong style.