How to use efficiently a wall?

A few days ago, @stone68 and I were playing a correspondence game (https://online-go.com/game/20251770). During that game, I ended up having a central wall (see column H - white).

How could I have had used that wall efficiently ? playing somewhere around the O 13 point ? What is your opinion on this ?

Thanks in avance for your comments.

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Well, let’s examine the position at Move 75. The OGS Leela suggests the natural move N4, pressing down on Black’s low group to take influence and build a moyo. This could be combined with a shoulderhit at Q9.

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Hey, thanks for that idea: I didn’t even think of that shoulder hit. This seems pretty efficient.