1. e2e4  1... b8c6 My favorite childhood opening! 2. g1f3 The simplest reply. It  is an invitation for the "normal play" after 2....e5. 2... d7d5 which is rejected. Carlsen goes for a super-risky Scandinavian instead. 3. e4d5  3... d8d5  4. b1c3  4... d5a5  5. f1b5  5... c8d7  6. e1g1 