comment: White's system is harmless for an elite classical game, but in rapid a normal position is enough to fight for a win.
context: 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 