[%c_effect g3;square;g3;type;Inaccuracy;persistent;true] In the post-game interview, Carlsen said that he doesn't understand why players keep choosing this line, as he thinks it's very comfortable for Black to play. In light of these words, I guess I have to label 7.g3 as a dubious move. It's hard to argue against Carlsen's chess understanding.
1. c2c4  1... g8f6  2. g1f3  2... e7e6  3. b1c3  3... d7d5  4. e2e3  4... c7c5  5. d2d4  5... a7a6  6. c4d5  6... e6d5 