[%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.
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 