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[Event "AUS-ch U12"] [Site "Adelaide"] [Date "2009.01.03"] [Round "2"] [White "Derwent, Ethan"] [Black "Gu, Sean"] [Result "1-0"] [WhiteElo "943"] [BlackElo "1542"] [Variant "Standard"] [TimeControl "-"] [ECO "A40"] [Opening "Mikenas Defense"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nc6 { A40 Mikenas Defense } 2. c4 e5 3. d5 Bb4+ 4. Bd2 Bxd2+ 5. Nxd2 Nce7 6. e4 d6 7. Ngf3 f5 8. Be2 Nf6 9. Qc2 O-O 10. O-O Bd7 11. c5?! { (0.16 → -0.46) Inaccuracy. Bd3 was best. } (11. Bd3 fxe4 12. Nxe4 h6 13. Nxf6+ Rxf6 14. Rfe1 Bf5 15. Nd2 Bxd3 16. Qxd3 Nf5 17. Nf3 Rf8) 11... Rc8 12. Qb3?! { (-0.23 → -1.00) Inaccuracy. Bd3 was best. } (12. Bd3 fxe4 13. Nxe4 Nexd5 14. cxd6 Kh8 15. Nxe5 cxd6 16. Nxd6 Rxc2 17. Ndf7+ Kg8 18. Nxd8 Rxb2) 12... fxe4 13. Ng5 Kh8?! { (-1.05 → 0.00) Inaccuracy. Nf5 was best. } (13... Nf5 14. Ndxe4 Nd4 15. Qd1 h6 16. Ne6 Bxe6 17. Nxf6+ Qxf6 18. dxe6 Nxe2+ 19. Qxe2 Qxe6 20. Rfe1) 14. Ndxe4 Nexd5 15. cxd6 h6?! { (-0.27 → 0.30) Inaccuracy. Nf4 was best. } (15... Nf4) 16. Nxf6 Qxf6 17. Qxd5 Qxg5?! { (0.22 → 0.95) Inaccuracy. Bc6 was best. } (17... Bc6) 18. Qxb7 Rb8? { (0.44 → 1.85) Mistake. e4 was best. } (18... e4) 19. Qd5? { (1.85 → 0.21) Mistake. Qxc7 was best. } (19. Qxc7 Rfd8 20. Bf3 Rxb2 21. Rab1 Rxb1 22. Rxb1 Bf5 23. Rd1 Rd7 24. Qc6 Qg6 25. Qc5 e4) 19... c6 20. Qd3 Rxb2 21. Rfb1 Rxb1+ 22. Rxb1 Bf5 23. Qf3 Qd8 24. Rc1 Qxd6 25. Rxc6 Qe7 26. Qc3 Qb7 27. h3 Be4 28. Rc7 Qb1+ 29. Bf1 Qxa2 30. Qxe5? { (1.05 → -0.35) Mistake. f3 was best. } (30. f3 Qb1 31. Qxe5 Qb6+ 32. Kh1 Qg6 33. Rxa7 Re8 34. Qd4 Bc6 35. Kh2 Qg5 36. h4 Rd8) 30... Qxf2+ 31. Kh2 Qf4+ 32. Qxf4 Rxf4 33. Kg1 a5 34. Ra7 Rf5 35. Bc4 Rc5 36. Bf7 Rc1+ 37. Kf2 Rc2+ 38. Ke3 Bxg2 39. Bg6 Bxh3?? { (-1.14 → 47.66) Blunder. Rc8 was best. } (39... Rc8 40. Rxa5 Bxh3 41. Kf2 Kg8 42. Kg3 Rc3+ 43. Kf4 Rc6 44. Ra8+ Rc8 45. Ra5 Be6 46. Ra6) 40. Bxc2 g5 41. Rxa5 Kg7 42. Ra7+ Kf6 43. Ra6+ Kg7?! { (46.17 → Mate in 28) Checkmate is now unavoidable. Ke5 was best. } (43... Ke5 44. Rxh6 g4 45. Be4 Bf1 46. Rg6 Bh3 47. Rg5+ Kf6 48. Kf4 Ke6 49. Bf5+ Kd6 50. Ke3) 44. Rg6+ Kf7 45. Rxh6 g4?! { (46.14 → Mate in 15) Checkmate is now unavoidable. Be6 was best. } (45... Be6 46. Kd4 Ke7 47. Rg6 Bf7 48. Rxg5 Kf6 49. Rf5+ Ke7 50. Be4 Be8 51. Re5+ Kf7 52. Bg6+) 46. Kf4 Kg7 47. Rb6 Kf7 48. Bf5 Bg2 49. Bxg4 Ke7 50. Ke5 Kf7 51. Ra6 Kg7 52. Kf5 Bd5 53. Kg5 Kf7 54. Ra7+ Ke8 55. Kf6 Kf8 56. Rd7 Bc6 57. Rd8+ Be8 58. Bh5 Kg8 59. Rxe8+ Kh7 60. Bg6+ Kh6 61. Rh8# { White wins by checkmate. } 1-0