1. c2c4  1... g8f6  2. b1c3  2... e7e5  3. g1f3  3... b8c6  4. g2g3  4... c6d4 A solid line which served Black well in the past. 5. f1g2  5... d4f3  6. g2f3  6... f8b4  7. d1b3  7... a7a5  8. e1g1  8... b4c5  9. d2d3  9... e8g8  10. f3g2  10... d7d6  11. b3c2  11... h7h6 [#] 12. c3a4 A novelty, and a start of a capital anti-dark-squared bishop plan. 12... c5a7  13. c1d2  13... c7c6  14. c4c5 That is the point, Caruana wants to exclude the enemy dark-squared bishop from the game for as long as he can.