In return Giri builds the H\FCbner-Portisch  wall.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. a2a3 The world champion often chooses this line against the Nimzo-Indian in blitz and rapid. 4... b4c3  5. b2c3  5... c7c5  6. e2e3  6... b8c6  7. f1d3  7... d7d6  8. g1e2 