1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. c2c3  4... g8f6  5. d2d3  5... d7d6  6. c1g5  6... h7h6  7. g5h4  7... a7a6  8. b1d2  8... c5a7  9. e1g1  9... e8g8  10. a2a4  10... g7g5  11. h4g3 The early sortie of this bishop  is a double-edged sword. It might do a great job pinning the opponent's  knight, but it may end up excluded from the game. At the same time, in  order to force the bishop out of the game Black needs to advance the pawns in front of his king, thus exposing it. 11... g8g7  12. f1e1 White wants  to free his bishop with brute force. The push d3-d4 followed by e4-e5 is a threat. 12... f6h7  13. b2b4  13... h6h5  14. h2h3  14... h5h4  15. g3h2  15... g5g4  16. h3g4  16... c8g4  17. b4b5  17... c6e7  18. d3d4 Now the pressure is all over the board. 18... e7g6  19. b5a6 Giri comes well armed for the encounter and produces a  novelty. 19... b7a6  20. d2f1  20... e5d4 Optimistic play by Kovalev. 21. c3d4  21... g4f3  22. g2f3  22... f7f5 This was Black's point. However, it will  quickly transpire that this is rather weakening the black king. 23. f1e3  23... f5e4  24. f3e4 