1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... a7a6 Carlsen has used this variation of the Queen's Gambit many times. 5. c4d5 This move is the most played. White needs to avoid the threat of capture on c4 followed by b7-b5. 5... e6d5  6. c1f4 This move isn't very dangerous. 6... f8d6  7. f4d6 A natural move, but the alternatives 7.Bg3 and 7.Be5 are also important. 7... d8d6  8. e2e3  8... e8g8  9. f1d3  9... b7b6 I found few games in my database with this plan. The development of the bishop on g4 seems to be fine for Black. 10. e1g1  10... c8b7  11. d1c2 Simple development. White prepares Rfd1 and Rac1. 11... b8d7  12. f1d1  12... f8e8  13. a2a3 A new move and an interesting plan. White wants to play b4, even after c7-c5. 13... c7c5  14. d4c5  14... b6c5  15. b2b4 That's the idea. The break on b4 is a typical way to fight against hanging pawns (Black's formation with pawns on d5 and c5). 15... a8c8 