noun
reverse sente
A Go term: a move that would be sente (initiative) for the opponent if they played it, but is gote (losing initiative) for the player who actually plays it. Compare 逆ヨセ.
この手は逆先手になるので、打つ前に慎重に読む必要がある。
This move becomes reverse sente, so you need to read carefully before playing it.
逆先手を打つことで、相手の先手を消すことができる。
By playing a reverse sente move, you can erase the opponent's sente.
逆ヨセ is a related endgame concept where a move that would be the opponent's sente endgame play is taken first. 逆先手 is a broader term that can apply outside the endgame as well.
Compound of 逆 (reverse) and 先手 (sente, initiative). A technical term from the game of Go.