1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... b7b5  6. a4b3  6... f8c5 Caruana is a great expert in the Archangelsk Variation, having used it in countless online and over-the-board games. He also has an excellent and detailed course on it. 7. c2c3  7... d7d6  8. a2a4  8... c8b7 8...Rb8 is the main line and 8...Bg4 is also an important alternative. 9. d2d4  9... c5b6  10. f1e1  10... c6e7 [%c_effect e7;square;e7;type;Interesting;persistent;true] A fresh idea that has been employed by Caruana before. The knight heads to g6. 11. b1d2  11... e7g6  12. b3c2  12... e8g8  13. d2f1  13... c7c5 Play by both sides was very natural and the position is equal. 14. f1g3  14... h7h6 A typical and useful move to prevent Bg5. 15. h2h3 A move that is also prophylactic. The main idea is to place a bishop on e3 without Black having Ng4. 15... f8e8  16. d4e5 In the Ruy Lopez, White usually has a dilemma whether to play d5 or dxe5. Apparently, both lead to equality here.