From the start of the game what is the longest possible series of consecutive white moves where white can do those moves no matter what black does? From the start of the game what is the longest possible series of consecutive white moves where white can do those moves no matter what black does?

So I want the longest list of moves white can do after starting the game no matter what moves black does. So what is the maximum number of moves he can plan ahead and be sure he will be able to do it?
Three moves.

On move 3, Black can crash through with his queen on f2 or d2 via several different squares, forcing White to respond. There is no series of White moves that can prevent all such checks.

[FEN ""]

1. Nf3 (1. e3 e5 2. c3 Qf6 3. g3 Qxf2+) 1... c6 (1... e5 2. c3 Qh4 3. e3 Qxf2+) 2. g3 Qa5 (2... Qb6 3. c3 Qxf2+) 3. e3 Qxd2+ *