[Event "XVII CAMPEONATO SUDAMERICANO DE AJEDREZ SUB-20"] [Site "Yotaú All Suites Hotel, Av. San Martín 7, Santa Cruz de la Sierra"] [Date "2022.12.18"] [Round "7"] [Board "7"] [White "Elena, Eduardo"] [Black "Rios Perez, Ricardo Daniel"] [Result "1-0"] [ECO "A01"] [WhiteElo "1907"] [BlackElo "1720"] [PlyCount "163"] [EventDate "2022.12.14"] [EventRounds "9"] [EventCountry "BOL"] 1. e4 e5 2. b3 Nc6 3. Bb2 Bc5 4. Nf3 d6 5. a3 Nf6 6. Bd3 Nh5 7. b4 Bb6 8. h3 Nf4 9. Bf1 f5 10. d3 fxe4 11. dxe4 O-O 12. Nbd2 Qf6 13. g3 Ne6 14. Bg2 Ncd4 15. Bxd4 Bxd4 16. Rb1 Ng5 17. Rb3 Be6 18. Rd3 c5 19. c3 c4 20. h4 Nf7 21. Rxd4 exd4 22. Nxd4 Ne5 23. O-O Kh8 24. f4 Nc6 25. Ne2 Bg4 26. Bf3 Bxf3 27. Rxf3 b5 28. a4 a6 29. a5 Rae8 30. Re3 Ne5 31. Nd4 Nd3 32. Qe2 Qg6 33. Kh2 Rf7 34. Nf5 Qf6 35. Nd4 h6 36. h5 g5 37. hxg6 Qxg6 38. N2f3 Rfe7 39. Nh4 Qf6 40. Qf3 Rf7 41. Nhf5 Qg6 42. Kg1 Rg8 43. Kf1 d5 44. Nh4 Qh7 45. e5 Rgf8 46. f5 Re7 47. e6 Qg7 48. Ke2 Qf6 49. Ng6+ Qxg6 50. fxg6 Rxf3 51. Rxf3 Ne5 52. Rf8+ Kg7 53. Ra8 Kxg6 54. Rxa6 Nf7 55. Kd2 Ng5 56. Rb6 Ne4+ 57. Kc2 Nxg3 58. a6 h5 59. Rb7 Re8 60. a7 Ra8 61. e7 Kf7 62. e8=Q+ Kxe8 63. Rb8+ Kf7 64. Rxa8 Kg7 65. Rb8 Kg6 66. a8=Q Kg5 67. Rg8+ Kh4 68. Rxg3 Kxg3 69. Qg8+ Kf4 70. Qf7+ Kg3 71. Qf3+ Kh4 72. Qxd5 Kg4 73. Qxb5 h4 74. Qxc4 Kg3 75. Qg8+ Kh3 76. Qg5 Kh2 77. Qxh4+ Kg2 78. Qg4+ Kh2 79. Qg5 Kh3 80. Ne2 Kh2 81. Qg3+ Kh1 82. Qg1# 1-0