1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c6  5. e2e3  5... b8d7 A relatively slow start of the opening, a solid Meran, but things are going to change very soon. 6. f1d3  6... d5c4  7. d3c4  7... b7b5  8. c4d3  8... c8b7  9. e1g1  9... a7a6  10. e3e4  10... c6c5  11. e4e5 Duda has  prepared something... 11... f6d5  12. f3g5  12... d5c3  13. b2c3  13... f8e7  14. g5e6 That is the  novelty by the Polish GM! Such a blow is very common when the enemy king  is stuck in the center. The sacrifice is, as a rule, explosive by nature:  White is searching for a quick mate. However here, Duda aims for a  long-term attack. 14... f7e6  15. d1h5  15... g7g6  16. d3g6  16... h7g6  17. h5g6 The key behind the sacrifice. 17... e8f8  18. c1h6  18... h8h6  19. g6h6  19... f8g8  20. h6g6  20... g8h8  21. g6h6  21... h8g8  22. h6e6 For the three pieces, White has a rook and four pawns; enough  material. In most cases, though, the pieces should prevail. Here the  situation is far more complex. First of all, Black's king is in danger.  Secondly, the white pawns are moving quite fast. We should not forget the  psychological effect of the preparation, as well as the added time on the  clock for White. 22... g8g7  23. a1d1  23... d7f8  24. e6g4  24... g7h8  25. d4d5 The pawns start rolling, but that allows  time for Dubov to consolidate his kingside. 25... f8h7  26. d5d6  26... e7h4  27. e5e6  27... d8f6 Dubov keeps the queens and intends to  counterattack. 28. e6e7  28... b7c6  29. g2g3 Now it gets messy as the white king will be also  exposed. 29... a8g8  30. g4h5  30... f6c3  31. d1d5 A spectacular way to continue the attack. 31... c6d5  32. h5d5 The threat is Qd5xg8! 32... h7f6 A blunder. 33. d5g8 Dubov might have missed this shot. 33... f6g8  34. e7e8q  34... h4f6  35. e8h5  35... h8g7  36. f1d1  36... g8h6  37. d6d7  37... h6f7 Dubov stopped the pawn,  but since his king is naked, he cannot save the game. Duda quickly  organizes a decisive attack against it. 38. h5g4  38... g7f8  39. g4e6  39... c5c4  40. d1d5 The key move in the attack. 40... b5b4 Black's only chance. 41. d5f5  41... f8g7  42. g1g2  42... b4b3  43. a2b3 