2006 U.S. Open Upsets

(Round 4)

Bat-Ochir Gunsen (2189) - Florin Felecan (2466) [B09]

US Open/Chicago, USA (4) 2006


1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. f4 a6!?

The "Tiger's Modern" method of playing the Pirc.

 

5. Nf3 b5 6. Bd3 c5 7. dxc5 dxc5

7... Bxc3+!?

 

8. e5! Bb7 9. Qe2 Nc6 10. O-O Nh6 11. a4 c4 12. Be4 Nf5

White has adopted a very nice set-up which assures an advantage in space and better piece placement. He now inflicts a structural weakness upon his opponent as well.

 

13. Bxf5 gxf5 14. Rd1 Qa5 15. Be3 b4 16. Nd5 Nd4

Perhaps instead 16... Nxe5 17. Nxe5 Bxd5 18. Nxc4 but White still has the edge.

 

17. Nxd4 Bxd5 18. Nxf5 Bf8 19. Qf2

Threatening the embarrassing 20.Bb6, winning Black's Queen. Black is in trouble.

 

19... Rb8 20. Ba7! Rb7 21. Bc5

Even stronger was the immediate 21. Ne3! Rxa7 (21... e6 22. Nxd5 exd5 23. Bd4 Bg7 24. Qg3) 22. Nxd5

 

21... e6

21... Be4 22. Ng3 Bxc2! 23. Qxc2 Qxc5+ 24. Kh1 Bg7 25. Qe4

 

22. Bxf8 Kxf8 23. Ne3! Rg8 24. Nxd5 exd5 25. Rd4 b3 26. c3 Re7 27. Rad1 Qxa4 28. Rxd5 Kg7 29. Qh4

And here again the immediate 29. f5! is probably more devastating.

 

29... Re6 30. f5! Rc6 31. Qg5+ Kh8 32. Rd8

and Black resigned rather than be mated after, according to Fritz 8:

32... Rcg6 33. fxg6 Rxd8 34. Qf6+ Kg8 35. Rxd8+ Qe8 36. Rxe8# 1-0


Michael Lee (2124) - Timothy Taylor (2384) [A10]

US Open/Chicago, USA (4) 2006


1. c4 f5 2. Nc3 Nf6 3. g3 d6 4. Bg2 e5 5. d3 Be7 6. Rb1 O-O 7. b4 Qe8 8. e3 Nc6 9. Nge2 Be6 10. Nd5! Bd8 11. b5 Ne7

11... Bxd5!?

 

12. Nxf6+ Rxf6 13. Bxb7 Rb8 14. Bg2 c6 15. a4

White has snagged a pawn out of the opening and goes about defending it -- and he is definitely on the defensive.

 

15... d5 16. f4! exf4

16... e4!?

 

17. Nxf4 dxc4 18. Nxe6 Rxe6 19. dxc4 Ba5+ 20. Kf2 Ng6 21. Bxc6! Rxc6 22. bxc6 Rxb1 23. Qd5+ Kh8 24. Qxa5 Ne5 25. c7

25. Rd1! Nxc6 26. Qxf5 Fritz

 

25... Nd3+ 26. Ke2 Nxc1+ 27. Rxc1 Rxc1 28. Qd2 Qh5+??

28... Rxc4 29. Qd8 Qg8 Fritz

 

29. Kd3! Rxc4?










29... Qe8 30. Qxc1 Qd7+ 31. Kc3 Qxc7 32. Qh1!

 

30. Qb4!!

If instead 30. Kxc4 Qf7+ 31. Qd5 Qxc7+ and it would be very hard for White to win.

 

30... h6

30... Qd1+ 31. Kxc4 Qc2+ 32. Kd5

 

31. Qxc4 Qd1+ 32. Kc3 Qe1+ 33. Kb2 Qd2+ 34. Qc2 Qb4+ 35. Ka2

and Black is all out of checks.

1-0

Games in PGN

Blog post 8.10.2006

Michael Goeller © 2006