[Event "Grand Prix Hamburg 2019"] [White "Grischuk, Alexander"] [Black "Duda, Jan-Krzysztof"] [Site "Hamburg"] [Round "4.4"] [Annotator ""] [Result "1-0"] [Date "2019.11.17"] [WhiteElo "2759"] [BlackElo "2734"] [PlyCount "63"] 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bg2 d5 8. 0-0 0-0 9. Ne5 c6 { E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations} (9... c5 10. Bc3 Bb7 11. Nd2 Na6 12. Rc1 Re8 13. e3 cxd4 14. Bxd4 Ba3 15. Rb1 Bf8 16. Qe2 Nb4 17. Rfd1 {½-½ (65) Radjabov,T (2759)-Gelfand,B (2676) Moscow 2019} )10. Bc3 Nfd7 11. Nd3 dxc4 {White has an edge.} 12. Nb4 cxb3 { Strongly threatening ...Bxb4.} 13. Nxa6 Nxa6 14. Bxc6 Rb8 {} ({ Black should try Predecessor:} 14... Rc8 {} 15. Bb7 Rxc3 { Remove Defender, Decoy} 16. Nxc3 Qc7 17. Bxa6 {1-0 (77) Nowakowski,M (2446)-Carapinha,F (2264) ICCF email 2011} )15. axb3 {} Nb4 16. Bxb4 Bxb4 17. Rxa7 Nf6 18. e3 Rc8 19. Bg2 Re8 20. Nd2 Re7 21. Rxe7 Bxe7 22. Nc4 Bf8 23. Qa1 b5 24. Ne5 Qb6 25. Rc1 Rxc1+ 26. Qxc1 Qa7 27. Qc8 b4 {} (27... g6 {} 28. Bc6 Kg7 29. Bxb5 Bd6 )28. Bb7 { aiming for Qc7.} Qa1+ 29. Kg2 { Hoping for Qc7.} Qa5 30. Bc6 Qa7 (30... Qb6 { was called for.} 31. h3 h6 )31. Be8 Nxe8 32. Nd7 { Accuracy: White = 98%, Black = 33%. } ({ Not} 32. Qxe8 {} Qb7+ 33. Kf1 Qa7 {} )1-0