1. e2e4  1... g8f6 In the interview after their first game, Duda revealed that it  was very difficult to prepare against Xiong as the young American plays so many things. Now it was the Polish GM's turn to surprise. He had never  opted for the Alekhine, at least according to the Megabase. 2. e4e5  2... f6d5  3. c2c4  3... d5b6  4. d2d4  4... d7d6  5. f2f4  5... c8f5  6. b1c3  6... e7e6  7. g1f3  7... f8e7  8. c1e3  8... e8g8  9. f1e2  9... d6e5  10. f4e5  10... b8c6  11. e1g1  11... f7f6  12. e5f6  12... e7f6  13. b2b3 This might have been a  surprise for Black. 13... d8e7  14. d1e1  14... a8d8  15. a1d1  15... f5g4 This novelty will not survive. The idea of putting  pressure against the d4 pawn is a key concept of the Alekhine defense, but here it falls short by one move. 16. c3e4 White manages to annihilate the enemy bishop before it does  damage to him. 16... h7h6  17. e1g3  17... g4f5  18. e4f6  18... f8f6  19. f3h4 Natural and strong. 19... f5c2  20. f1f6 Now very forcing play starts when the price of a  mistake is an earlier flight back home. 20... c2d1 Strictly speaking,  a blunder. 21. f6g6  21... c6d4  22. e2d3  22... d4e2  23. d3e2  23... d1e2  24. e3h6 All of this is forced. The black king is almost mated; therefore, quick counterplay is needed. Duda hurried to  insert the rook into the attack: 24... d8d1 And committed the decisive mistake. 25. g1f2  25... e7f8  26. h4f3 The only move but sufficient for the win. 26... d1d7  27. f2e2  27... g8h7  28. f3g5 The attack is decisive, and Xiong mercilessly  finishes the job: 28... h7h8 