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.