But this move turns out to be a nasty blunder.
1. c2c4  1... e7e5  2. b1c3  2... g8f6  3. g2g3  3... f8b4 A curious thematic match. The Rossolimo  line was discussed disregarding the color. 4. e2e4  4... b4c3  5. b2c3  5... e8g8  6. f2f3 Amazing how fresh these positions are. This is a  novelty! 6... b7b5 And a bold sacrifice in return! 7. d2d4 Long-term factors before everything. Notice how again Carlsen has  only pawns moving, but the presence of his bishop pair makes the dynamic  risk worth it. 7... e5d4  8. c3d4  8... b5c4  9. e4e5 An important move to win a couple of tempos for the  development and stabilize the center. 9... f6d5  10. f1c4  10... c8b7  11. g1h3 The best square for the knight. 11... d7d6  12. e1g1 Now Carlsen misses a chance to use the bishops effectively. 12... b8d7  13. f1e1  13... d6e5  14. d4e5  14... d7b6  15. c4b3 So far both players have played brave, uncompromising chess, and this led to an extremely messy position.