This move unnecessarily weakens the light squares. It's better to follow the normal plan.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 Robson has a very dynamic and aggressive style, his games tend to attract the attention of spectators. Considering this, it's curious that he has the Berlin Defense in his repertoire, such a solid defense. Luckily, that didn't stop him from creating one of his usual entertaining attacks. 4. d2d3  4... f8c5  5. b5c6  5... d7c6  6. b1d2  6... f6d7  7. d2c4  7... f7f6  8. c1e3  8... c5e3  9. c4e3  9... d7c5  10. e1g1  10... c5e6  11. c2c3 This move was tested in a few email games. The intention is unequivocal: dominate the center with d3-d4. 11... c6c5 Avoiding White's plan. 12. d1c2  12... b7b6  13. f1d1  13... d8d7 A new move. 14. a2a4 Truth be told, White doesn't have much. Black's position is very solid, with good central control. This is the best way to create problems. 14... c8a6  15. b2b4 Dynamic and interesting play. 15... a8d8  16. b4b5  16... a6b7  17. c2b3 A logical move, preparing the a5 advance. 17... d7f7 