1. e2e4  1... e7e5  2. g1f3  2... g8f6 Challenging Caruana on his own territory, and this is not for the first time! The American GM basically paved his way for the  WWC holding the black color in Berlin Candidates with the Petroff, whereas the Polish GM has the defense as a major part of his repertoire. 3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. b1c3 The sharpest reply against the Petroff. 5... e4c3  6. d2c3  6... f8e7  7. c1e3  7... b8d7  8. d1d2  8... e8g8  9. e1c1  9... d7f6  10. f1d3  10... c7c5 [#] 11. h1g1 A novelty. And a venomous one. White is  ready to advance the g-pawn. 11... b7b5 After some reflection, Duda answers in the most aggressive  way. 12. g2g4 Caruana does not mind the bollocks. 12... c8b7  13. d2e2  13... c5c4 This seems dangerous, but the white pieces are far more  resilient than they seem. 14. d3f5  14... f8e8  15. f3d4 Finally some thought by Caruana. 15... f6d5 Provocation? Or  more likely a blunder? 16. d4e6 The brilliant point behind White's play. All the white pieces  make perfect sense now. Black needs to walk his way through on a very thin road now, on the edge of the abyss. And there is a strong, cold wind  blowing... 16... d8a5 The only move which Duda played after more than  half an hour on the clock. A clear sign that he missed the opponent's last move (or something afterwards). 17. e2f3 Now everything hangs, and nothing can be taken! Let's try to  understand what's happening. 17... e7f6 A sign for the courage. "It  is not mate if I mate you first." 18. g4g5 I am faster, thinks Caruana. The move in the game deprives  Black of some extra possibilities. 18... f6c3 The only move. 19. f5h7 This was to be expected. 19... g8h7  20. g5g6 Further exposing the black king. 20... f7g6  21. e6g5  21... h7h8  It seems that Black's turn had come, and he will start his own checks on  the dark squares. But Caruana had seen it all. 22. e3d4 Fantastique! The bishop defends the white king, threatens with mate on g7, and if it is taken it would be replaced by the white rook.  What more can we say to promote the centralization! 22... c3d4 The right choice. 23. d1d4  23... d5f6 Brilliant defense by Duda. In the sharp time-scramble  that occurred, the Polish GM squeezed every little chance he could get. 24. f3b7  24... a8b8  25. b7f7  25... e8e1 Diverting the white rook from the mating  fourth rank. 26. d4d1  26... e1g1  27. d1g1  27... b8e8 Threats and only threats can leave Black chances. 28. g5e6 And White needs to create threats, or else he risks to be  mated too. 28... e8e6  29. f7e6  29... a5a2 The forced play is almost over. After a  two-time repetition to gain a couple of minutes on the clock: 30. e6h3  30... h8g8  31. h3e6  31... g8h7  32. e6h3  32... h7g8  33. h3a3 Caruana forces the trade of the  queens. The arising endgame seems won for White as the long-ranged rook is especially superior to the short-legged knight in these endgames. 33... a2a3  34. b2a3 Next both centralized their kings. 34... g8f7  35. c1d2 