A04 Unusual lines after 1.Nf3 and King's Indian Attack (1.g3 c5 2.Bg2 Nc6 3.Nf3 g6 4.O-O Bg7 5.c3)

[Event ""] [Site ""] [Date "2020.01.19"] [White "IK"] [Black "Vierjoki, Timo"] [Result "1-0"] [ECO "A04"] [WhiteElo "1727"] [BlackElo "1744"] [Annotator "Tactical Analysis 2.10 (5s), TV"] [PlyCount "41"] 1. g3 (1. Nf3 c5 2. g3 Nc6 {0-1 (52) Klempt,G (2069)-Bogorads,M (2197) Naumburg 2002} (2... g6 3. Bg2 Bg7 4. O-O {0-1 (50) Berkovich,M (2413)-Landa,K (2641) Israel 2008})) 1... c5 {A00 Hungarian Opening: Sicilian Invitation} 2. Bg2 Nc6 3. Nf3 g6 4. O-O Bg7 5. c3 {A04 Unusual lines after 1.Nf3 and King's Indian Attack} e5 6. e3 $2 {-1.34/23 [#]} (6. c4 $14 {0.50/21 keeps the upper hand.}) (6. d4 exd4 7. cxd4 cxd4 8. Na3 Nge7 9. Nb5 Nf5 10. Bf4 d6 11. g4 a6 12. Qa4 axb5 13. Qxa8 Nfe7 14. e3 dxe3 15. Qa3 exf2+ 16. Rxf2 b4 17. Qd3 d5 18. h3 O-O 19. Qd2 f5 20. Bh6 fxg4 {Berkovich,M (2413)-Landa,K (2641) Israel 2008 0-1 (50)}) (6. a3 c4 7. d3 cxd3 8. exd3 d5 9. b4 Nge7 10. Re1 f6 11. b5 Na5 12. a4 O-O 13. Ba3 Re8 14. Nbd2 Be6 15. Bb4 Nf5 16. g4 Nd6 17. g5 Bf7 18. gxf6 Bxf6 19. h4 h6 20. Nh2 Bg7 {Gutman,L (2426)-Pap,M (2459) Bad Woerishofen 2015 1/2-1/ 2}) 6... Qb6 $2 {0.61/19} (6... e4 $17 {-1.34/23} 7. Ne1 d5) 7. d4 cxd4 $146 ( 7... d6 8. d5 Nce7 9. Na3 Nf6 10. c4 O-O 11. Rb1 Bf5 12. Nc2 Qa6 13. Nh4 Qxc4 14. Nxf5 Nxf5 15. b3 Qa6 16. b4 b5 17. bxc5 dxc5 18. Qe2 Nd6 19. Na3 Rab8 20. e4 Nd7 21. Re1 Rb6 22. Bf1 {Klempt,G (2069)-Bogorads,M (2197) Naumburg 2002 0-1 (52)}) 8. exd4 {And now Nxe5 would win.White is better.} exd4 {2.01/20} ( 8... e4 $1 $14 {0.59/19}) 9. cxd4 $2 {-0.16/22} (9. Nxd4 $18 {2.01/20 Threatens to win with Na3.} Nge7 10. Re1) 9... Nxd4 $2 {3.75/19} (9... d5 $1 $11 {-0.16/22 and Black is okay.}) 10. Nxd4 $18 Bxd4 11. Nc3 {[#] Black must now prevent Nd5.} Bxc3 $2 {6.37/22} (11... Ne7 {3.55/22} 12. Qe2 Qe6) 12. bxc3 Kf8 13. Be3 Qd8 14. Qd6+ Kg7 15. Rae1 {2.68/23} (15. Rfe1 $142 {6.56/22}) 15... Qf8 $2 {8.52/21} (15... a5 {2.68/23} 16. Bd5 Ra6) 16. Qc7 Qa3 17. Bd5 Nh6 18. Bxh6+ {White mates.} Kxh6 19. Qf4+ Kg7 20. Qxf7+ Kh6 21. Re4 {Accuracy: White = 46%, Black = 12%.} 1-0