noun
outside influence; influence of stones
Go term referring to the influence exerted by stones on the outside of the board, often contrasted with territory. Compare 勢力 (sense 2).
See also: 勢力
この布石では黒の外勢が厚い。
In this opening, Black's outside influence is thick.
白は外勢を重視した打ち方を選んだ。
White chose a style of play that emphasizes outside influence.