noun
response move; countermeasure
Primarily used in shogi or go for a move made in response to the opponent's play; can also refer to a countermeasure in a broader strategic context.
相手の攻めに対して適切な応手を考えなければならない。
You must think of an appropriate response move against the opponent's attack.
この局面では三通りの応手がある。
In this board position, there are three possible response moves.