Q. on which way is best to stop Black Queen b6?

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IrregularSam

In your view, which is the best way to stop Black Queen's movement to b6? 

White Queen to b3, as Simon shows in his Chess.com Basic Lesson,

OR why not just White Pawn to b3 (as I have indicated with the little black arrow annotation added below)?

Many thanks ~ Sam.

IrregularSam

Would still benefit from hearing helpful advice / views of club members? - Thanks.

hc435673

Ok