1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6  4. d2d3  4... f8c5  5. c2c3  5... e8g8  6. e1g1  6... d7d6  7. b5a4  7... c6e7  8. a4c2 White prepares d3-d4 but does not yet show where will his  queenside knight go. 8... e7g6  9. d3d4  9... c5b6  10. a2a4  10... c7c6  11. d4e5  11... g6e5  12. f3e5  12... d6e5  13. d1d8  13... f8d8  14. a4a5  14... b6c5  15. b1d2  15... c8e6 The opening went fine for Grischuk and he enjoys comfortable  equality. Black's problem was purely psychological. As Grischuk put it he  clearly understood that this same position can be achieved with reversed  colors. Obviously he became extra confident and committed a serious  inaccuracy. 16. f1e1  16... b7b5 "Very big mistake." (Grischuk) 17. d2b3  17... e6b3 The Russian GM did not like neither of the alternatives, but it seems as this  is the real mistake. 18. c2b3  18... f6g4  19. e1e2 Now White is clearly better thanks to his bishop  pair. Carlsen quickly builds upon his advantage.