For a moment White hesitates.
1. e2e4  1... c7c5  2. g1f3  2... b8c6  3. d2d4  3... c5d4  4. f3d4  4... e7e5  5. d4b5  5... d7d6  6. c2c4  6... f8e7  7. b1c3  7... a7a6  8. b5a3  8... c8e6  9. a3c2  9... a8c8 Not the main line. 10. f1e2  10... c6a5 Cori wants to generate queenside play before he castles, but  this might be a risky strategy here. 11. b2b3  11... b7b5  12. c2e3  12... b5c4  13. e3d5 Only energetic play can refute  Black's idea. This move is a novelty and reveals some problems behind  Cori's set up. 13... g8f6  14. c1e3 Be3-b6 is a huge threat and Black needs to initiate some trades. 14... e6d5  15. c3d5  15... f6d5  16. d1d5  16... e8g8  17. e1g1  17... c4b3  18. e2a6  18... c8c3  19. f1b1 Wonderfully played! Nihal spots that the c3 rook is in  danger. 19... a5c6  20. b1b3 White wants to keep a passer along the a-file as then his bishop may support it all the way up to the promotional square. 20... c3b3  21. d5b3  21... c6d4 Cori decided to defend a gloomy position with  opposite-colored bishops on the board. 22. e3d4  22... e5d4  23. a6c4 Black is in trouble. His bishop is significantly  underperforming in comparison to its counterpart and the a-passer is a  monster. 23... d8a5  24. g2g3  24... e7g5  25. g1g2  25... g7g6  26. c4d5  26... a5c3  27. a1d1  27... g8g7  28. d1d3  28... c3c5  29. a2a4  29... g5d8  30. b3b2  30... d8b6 