Play the 4. f3 Nimzo-Indian
The Most Aggressive Response to the Nimzo Explained by One of it's Leading Exponents
The Nimzo-Indian is an extremely popular and reliable defence, upon which most world champions have relied at some point in their careers. Black controls the vital e4-square with his pieces, and retains total flexibility with his central pawns. By playing 4. f3, White challenges Black's idea head-on. Either Black grants White control of e4, or else he must commit his pawn to d5, whereupon White can begin concrete action in the center.
The Most Aggressive Response to the Nimzo Explained by One of it's Leading Exponents