1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. d2d4  3... c5d4  4. f3d4  4... a7a6 The Paulsen Variation has a somewhat dubious reputation in elite circles these days, but Carlsen has played it a few times. 5. f1d3  5... d8c7  6. e1g1  6... g8f6  7. d1e2  7... d7d6  8. c2c4 White gets the Maroczy Bind formation, the one with the pawns on e4 and c4, which guarantees an advantage in space and a more comfortable game. 8... b8d7 Carlsen prepares to play the knight to e5 and capture the bishop on d3, which is also a bit provocative considering his development disadvantage. There are several alternatives. 9. b1c3  9... d7e5  10. h2h3 This is a rarely-played and difficult move. The idea is probably to place the bishop on e3 without Black having a knight jump to g4. 10.f4 is more natural. 10... b7b6 