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Kaidanov-Ivanov, Eastern Open, December 2011

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 6. Bg5 h6 7. Bh4 c5 8. dxc5 g5 9. Bg3 Ne4 10. e3 Qa5 11. Nge2 Bf5 12. Be5 O-O 13. Nd4 Re8 14. Nxf5 Rxe5 15. Nxh6+ Kg7 16. Ng4 Re6 17. Bd3 Nxc3 18. O-O Ne4 19. a3 Qxc5 20. Qd1 Bd2 21. Bxe4 Rxe4 22. h3 f5 23. Nh2 Bxe3 24. fxe3 Rxe3 25. Kh1 f4 26. Qg4 Rg3 27. Qf5 Qf8 28. Qxd5 Nc6 29. Ng4 Qd8 30. Qe6 Qe7 31. Qh6+ Kg8 32. Rae1 Qg7 33. Nf6+ Kf7 34. Qxg7+ Kxg7 35. Nh5+ Black resigns.

Hess-Tiviakov, Groningen, December 2011

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 g6 6. Nb5 Qd8 7. Bf4 Na6 8. Na3 c6 9. c3 Nc7 10. Nc4 Bg7 11. Be5 O-O 12. a4 Ncd5 13. a5 Bh6 14. Be2 Nh5 15. O-O Nhf4 16. Re1 Nxe2+ 17. Qxe2 Be6 18. Bg3 Rc8 19. Nce5 Bf5 20. Nd3 Bxd3 21. Qxd3 e6 22. c4 Ne7 23. Qb3 b6 24. axb6 Qxb6 25. Qc3 Nf5 26. Be5 f6 27. c5 Qb7 28. Bg3 Rfe8 29. Qc4 Qd7 30. Ra4 Nxg3 31. hxg3 Rc7 32. Ra6 Kf7 33. Qa4 Rb8 34. b4 Rb5 35. d5 Qxd5 36. Rxa7 Rxa7 37. Qxa7+ Kg8 38. Qe7 Rxb4 39. Ra1 Bf8 40. Ra8 Rb1+ 41. Kh2 Qh5+ 42. Nh4 Qh6 43. Qxe6+ Kh8 44. Qf7 Black resigns.

• David R. Sands can be reached at 202/636-3178 or by email at dsands@washingtontimes.com.