context: 1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... f8b4  4. d1c2 The Capablanca Variation against the Nimzo-Indian is solid and reliable, making it an especially good weapon if White only needs a draw. 4... d7d6  5. g1f3  5... b8d7  6. e2e3 A good way of developing. There are alternatives-White is usually slightly better. 6... b7b6  7. f1e2  7... c8b7  8. e1g1  8... b4c3 This move is necessary after White has castled, since the knight isn't pinned anymore and is ready to move, leaving the b4-bishop in danger. 9. c2c3  9... f6e4 Carlsen needed a win and embarks on a dangerous enterprise. 10. c3c2  10... f7f5 A natural continuation of the previous move, although it's better to castle. 11. d4d5 This move is seen in positions similar to this one and originating from the Bogo-Indian Defense. The central advance throws cold water on any claims Black has on the kingside. Capturing leads to catastrophe (as will happen in the game), but closing the center with e6-e5 leaves Black with no prospects and a terrible bishop on b7. 11... e6d5  12. f3d4 Black is full of weaknesses and the king is still in the middle of the board. The f5-pawn is attacked and the knight can also go to e6. 12... d5c4 This makes things even worse, but it's hard to recommend anything. 13. d4e6  13... d8c8 Black's position is sad and I guess even die-hard Carlsen fans didn't expect a turnaround at this point. 14. f2f3 Many roads lead to Rome.