1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... d7d5  4. c4d5  4... e6d5  5. c1g5  5... f8b4 Another recent opening trend, spicing the game a bit compared to the more solid 5...Be7. 6. e2e3  6... h7h6  7. g5f4 A rare move that has been played by Keymer before. 7... c8f5  8. f1d3  8... f5d3  9. d1d3  9... c7c6 Carlsen improves Black's play compared to the earlier Keymer game. 10. g1e2  10... f6h5 [%c_effect h5;square;h5;type;GreatFind;persistent;true] 11. f4e5  11... b8d7  12. h2h3 Creating a retreat route for the bishop. 12... h5f6  13. e5h2  13... e8g8 Carlsen's opening play was a success: the position is equal. Compared to normal Queen's Gambit Declined positions, the light-squared bishops have been exchanged and this clearly favors Black: the position is simplified and the c4-square is weakened after White's typical plan of advancing the pawn minority on the queenside. 14. a2a3  14... b4a5 It's hard to say where the bishop is better placed. Another option was to retreat it to e7. 15. e1g1  15... f8e8  16. a1c1 It's not so clear that the rook is useful on c1. The more natural option is to start the advance of the pawns on the queenside immediately. 16... d8e7  17. b2b4  17... a5d8  18. e2g3 The knignt heads to f5. 18... d8c7  19. g3f5  19... c7h2  20. g1h2 