All of this is very popular nowadays and the players  actually had an earlier discussion in the line.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4 The evergreen Italian. 3... f8c5  4. e1g1  4... g8f6  5. d2d3  5... d7d6  6. c2c3  6... h7h6  7. f1e1  7... e8g8  8. b1d2  8... a7a5  9. d2f1  9... c8e6 