White's stone at (4,7) holds the left end, so this three can never become an open four — which also means white may ignore it indefinitely. Its whole value is one move: (8,7), the point that turns it into a RUSH FOUR on (5,7)–(8,7), leaving exactly one five point at (9,7) that white is forced to block. That forced answer is the payoff: while white spends a stone at (9,7), you play wherever your real plan lives. Find the converting move — make the sleeping three speak.
Play the four-making point.
Finish this step to move on.