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.