1. c2c4 The English Opening is very popular right now at top level. 1... e7e5  2. b1c3  2... f8b4 Hans played this same position yesterday, with the white pieces, against Caruana. 3. c3d5  3... b4e7 Caruana played the slightly less popular 3...a5. 4. d2d4  4... e5d4  5. d1d4  5... g8f6  6. d5e7  6... d8e7  7. c1g5  7... b8c6  8. d4c3  8... d7d6  9. g1f3  9... c8e6 All this is still theory. 10. g2g3 A new move. White played 10. e3 in a high profile recent game. 10... h7h6 A logical move, forcing White to take on f6 and simplifying the position. 11. g5f6  11... e7f6  12. c3f6  12... g7f6  13. f3d2 This move is wrong. Maybe Nepomniachtchi confused his opening prepartion, since Black can achieve comfortable equality now.