1. d2d4  1... g7g6  2. e2e4  2... f8g7  3. g1f3  3... d7d6  4. f1c4  4... a7a6 A must-win situation requires  extreme measures. And preferably no theory at all. 5. e1g1  5... b7b5  6. c4b3  6... c8b7  7. f1e1  7... e7e6  8. c2c3  8... b8d7  9. a2a4  9... g8f6  10. b1d2  10... e8g8  11. b3c2 Dubov plays the Ruy Lopez and does not care what his opponent does... 11... c7c5  12. d2f1  12... d8c7  13. f1g3 All very logical. 13... f8c8  14. c2d3  14... b5b4  15. a4a5  15... c5c4 A risky transposition to a French pawn  structure. This move practically wins the a5 pawn in the long run, but  leaves the kingside exposed. 16. d3f1  16... b4b3  17. a1a4  17... d6d5  18. e4e5  18... f6e8  19. h2h4 The pawn chains are clearly  indicating on which side the players will attack. 19... b7c6  20. a4a1  20... c8b8  21. h4h5  21... b8b5  22. f3g5  22... d7f8 Clears the seventh rank for the defense. 23. d1f3  23... a8a7  24. g3h1  24... h7h6  25. g5h3  25... g6g5 Duda is winning the battle on the queenside and  will be very happy to close the opposite wing. 26. f3d1  26... b5a5  27. a1a5  27... c7a5  28. f2f4  28... g5g4  29. h3f2  29... f7f5  30. e5f6  30... e8f6  31. h1g3  31... a7f7  32. f1e2  32... c6d7  33. f2g4  33... f6g4  34. e2g4  34... a5c7  35. g3e2 The correct piece, but the wrong route.  35... a6a5 Now, in order to keep the attack running, Dubov once again has to sacrifice a pawn. 36. f4f5 And he is not hesitating in doing this! 36... e6f5  37. g4f3  37... d7c6  38. c1f4  38... c7d8  39. d1c1  39... g8h7  40. f4e5  40... f8e6 Duda consolidates. He has survived the attack and kept the material. The revenge is near. 41. e5g7  41... f7g7  42. e2f4  42... e6g5  43. c1e3  43... d8d6  44. f4g6  44... d6g3 Letting the advantage slip away. 45. e1f1  45... g7f7  46. e3e5 A nasty move! White is back in the game. 46... g5f3  47. f1f3 