[%c_effect f4;square;f4;type;GreatFind;persistent;true] Black arrives in time to pretend f2-f4. Something went wrong in White's opening play, as he is now left without a pawn break on both d4 and f4. Black, meanwhile, can reinforce his position, preparing to castle on the queenside and advance the pawns on the kingside.
1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 Caruana used this move faithfully during the Candidates Tournament. 4. b5c6  4... d7c6  5. d2d3  5... d8c7  6. h2h3 A typical move, preventing …Bg4. It's not really necessary and it's probably not the most accurate, despite being the most played. 6... e7e5  7. b1c3 [%c_effect c3;square;c3;type;Inaccuracy;persistent;true] This doesn't seem like a very good square for the knight, which should probably be heading to c4. 7... f8e7  8. c1e3  8... f6d7 [%c_effect d7;square;d7;type;GreatFind;persistent;true] The well-known maneuver …Nd7-f8-e6 (or g6) comes into play. It's important that Black is able to avoid the f2-f4 advance, which is the best plan for White. 9. f3d2  9... d7f8  10. e1g1  10... f8g6 [%emt 0:00:02][%timestamp 20] 11. c3e2 [%c_effect e2;square;e2;type;Inaccuracy;persistent;true] White doesn't have time to advance the f-pawn and it's better to forget this plan altogether.