Notes by Boris Schipkov

1. f4 d5 2. Nf3 g6 3. e3 Bg7 4. Be2 Nd7
If 4... Nh6 then 5. d4 O-O 6. O-O b6 7. c4 dxc4 8. Bxc4 Nf5 9. Nc3 Ba6 10. Bxa6 Nxa6 11. Qa4 Nb8 12. Rd1 c6 13. Qc2 e6 14. Qf2 Nd7 15. e4 Ne7 with a small advantage to White in Chernyshov, K - Haba, P, Czech Extra League 2000 (draw, 43).
5. O-O e5 6. fxe5 Nxe5 7. Nxe5 Bxe5 8. d4 Bg7 9. c4 dxc4!?
A novelty. In the game Bohn, T - Heinemann, T, Bundesliga 1990-1991 (0-1, 29) Black played 9... Nf6 10. Nc3 O-O 11. cxd5 Nxd5 12. Nxd5?! Qxd5 13. Bf3 Qd8 14. Qb3 c6 with equality. Better was 12. e4.
10. b3!? Nh6
Dangerous is 10...cxb3? 11. Qxb3 f5 12. Nc3 Nf6 13. Ba3 c6 14. Rad1 Qb6 15. Qc4 and White has a strong attack. Possible is 10...Ne7 11. bxc4 O-O 12. Na3 Nf5 13. Rb1 c5 with more or less equal game.
11. Ba3

   
11...Qg5!?
Also deserving attention is 11...Nf5!?
12. Rf4 Nf5 13. h4?! Nxh4
If 13...Qxf4 then 14. exf4 Bxd4+ 15. Kh2 Bxa1 16. Bxc4 Be6 17. Bxe6 fxe6 with unclear position. But 13...Qg3! is better.
14. Qf1 Nf5?!
Interesting is 14...Be6!?.
15. Qf3 c6?! 16. Nd2

   
16...Kd8?
The decisive mistake. 16...Be6 looks better, 17. Ne4 (17. bxc4 O-O-O 18. Bc5 Ng3 19. Bxa7 Nh5 20. Ne4 Qa5 21. Bc5 Nxf4 22. Qxf4 h5 23. Nd6+ Rxd6 24. Qxd6) 17... Qd8 18. Rxf5 gxf5 19. Nd6+ Kd7 20. Nxb7 Qc8 21. Nd6 Qa6 22. Bc5 with compensation. 16...Bf8 is also playable.
17. Ne4 Qh6 18. g4! Nxd4 19. Rd1 f5 20. g5 Qh5 21. Qg2
Black resigned. 1-0

Move

1. f4 d5 2. Nf3 g6 3. e3 Bg7 4. Be2 Nd7 5. O-O e5 6. fxe5 Nxe5 7. Nxe5 Bxe5 8. d4 Bg7 9. c4 dxc4!? 10. b3!? Nh6 11. Ba3 Qg5 12. Rf4 Nf5 13. h4?! Nxh4 14. Qf1 Nf5?! 15. Qf3 c6?! 16. Nd2 Kd8? 17. Ne4 Qh6 18. g4! Nxd4 19. Rd1 f5 20. g5 Qh5 21. Qg2 1-0

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