1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. d2d4  3... e5d4  4. f3d4  4... g8f6  5. d4c6  5... b7c6  6. e4e5  6... d8e7  7. d1e2  7... f6d5  8. b1d2 This isn't the most popular move, but it was played a few days ago by Erigaisi in a rapid online game, which certainly hasn't escaped Carlsen's team's attention. 8... d5f4  9. e2e3  9... f4d5  10. e3e4  10... f7f6  11. c2c4 A new move, played after a long think. This indicates that Carlsen was out of his preparation. His move is an interesting pawn sacrifice. 11... d5b4  12. e1d1  12... e7e5  13. a2a3  13... e5e4 