1. g1f3  1... g8f6  2. g2g3  2... g7g6  3. b2b3 Carlsen decides not to enter into a theoretical battle in the opening and chooses the calm double fianchetto variation. 3... f8g7  4. c1b2  4... d7d6  5. f1g2  5... e7e5  6. d2d3  6... e8g8  7. c2c4 White's system is harmless for an elite classical game, but in rapid a normal position is enough to fight for a win. 7... a7a5  8. b1c3  8... h7h6 This move is new. There are many ways for Black to play and possibly 8...c6 is the most accurate, since there's no clear use for the h-pawn advance at the moment.