How to Use the Horowitz defense in the Stonewall chess attack

This is a discussion of a tricky line against the Stonewall, the Horowitz Defense (2...Nf6 3.Bd3 Nc6). White allows Black to spend three moves capturing the light squared Bishop and bringing White's pawn from c2 to d3, preventing a ...Ne4 invasion. This makes for very dynamic play.

Matt personally uses this defense against the Stonewall.