1. d2d4  1... g7g6  2. e2e4  2... d7d6  3. g1f3  3... g8f6  4. b1c3  4... f8g7  5. f1e2  5... e8g8  6. e1g1  6... a7a6 A must win situation, and Carlsen avoids the main theoretical lines. 7. a2a4  7... b8c6  8. c1e3 The immediate 8.d4-d5 is becoming the main line according to my Megabase. 8... b7b6  9. d4d5 Simple and strong. White gains some more central squares with a tempo. 9... c6b8  10. f3d4 A logical follow-up. 10... c8b7  11. f2f3  11... c7c6 Carlsen frees his position a bit and finally enters Dragon waters. 12. d5c6  12... b8c6 