[Event "Valdivia op 2nd"]
[Site "Valdivia"]
[Date "2021.09.19"]
[Round "6"]
[White "Arriaza Sanchez, Sergio"]
[Black "Riquelme Abuffon, Nicolas Maximiliano"]
[Result "0-1"]
[ECO "A45"]
[BlackElo "1773"]
[PlyCount "106"]
[EventDate "2021.09.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "CHI"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 c5 3. d5 Qb6 4. b3 Qb4+ 5. Bd2 Qd4 6. Nc3 Nxd5 7. Nxd5 Qxd5 8. c4 Qf5 9. g3 Nc6 10. Bc3 d6 11. Bg2 e5 12. e4 Qg6 13. Ne2 Be7 14. 0-0 0-0 15. f4 Bg4 16. f5 Qh5 17. Re1 Nd4 18. Bxd4 cxd4 19. a4 a5 20. Qd3 Bd8 21. Kh1 Bb6 22. Ng1 g6 23. Bf3 gxf5 24. exf5 Qxf5 25. Be4 Qh5 26. Kg2 Rab8 27. Rf1 Be6 28. Rf5 Bxf5 29. Bxf5 Qh6 30. Re1 Bd8 31. g4 Bg5 32. Rf1 Bf4 33. Nf3 Kh8 34. h4 Rg8 35. Ng5 Rxg5 36. hxg5 Qh2+ 37. Kf3 Qg3+ 38. Ke2 Qxd3+ 39. Kxd3 Bxg5 40. Rh1 h6 41. Ke4 Kg7 42. Rh3 Kf6 43. Kd5 Bf4 44. Rh5 Rg8 45. Ke4 Ke7 46. Rh3 Kd8 47. Kd5 Kc7 48. Ke4 Rg5 49. Kd3 Kb6 50. Bd7 Kc5 51. Ke4 Kb4 52. Kd5 Be3 53. Rxh6 e4+ 0-1

[Event "Valdivia op 2nd"]
[Site "Valdivia"]
[Date "2021.09.19"]
[Round "5"]
[White "Pobbio Venegas, Franco Daniel"]
[Black "Arriaza Sanchez, Sergio"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "1802"]
[PlyCount "64"]
[EventDate "2021.09.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "CHI"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nf6 3. g3 g6 4. Bg2 Bg7 5. a3 0-0 6. b4 d6 7. Rb1 Nc6 8. Nh3 e5 9. d3 h6 10. bxc5 dxc5 11. 0-0 Re8 12. Be3 Bf8 13. Na4 Nd4 14. Qd2 Kh7 15. Nc3 Rb8 16. f4 e4 17. dxe4 Bxh3 18. Bxh3 Nxe4 19. Nxe4 Rxe4 20. Bg2 Re7 21. f5 Nxf5 22. Qxd8 Rxd8 23. Bxc5 Rxe2 24. Bxa7 Rdd2 25. Bd5 Rxh2 26. Rxb7 Rh3 27. Rxf7+ Bg7 28. Rb1 Rxg3+ 29. Kf1 Rxa3 30. Bc5 Ng3+ 31. Kg1 Ne2+ 32. Kf1 Ng3+ 1/2-1/2

[Event "Valdivia op 2nd"]
[Site "Valdivia"]
[Date "2021.09.18"]
[Round "3"]
[White "Reyes Mendoza, Tomas"]
[Black "Arriaza Sanchez, Sergio"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1879"]
[PlyCount "67"]
[EventDate "2021.09.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "CHI"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 c6 5. Nf3 Nf6 6. h3 e6 7. Bd3 Be7 8. Bg5 0-0 9. 0-0 b6 10. Qe2 Nbd7 11. Bh4 g6 12. Bg3 Qb4 13. a3 Qa5 14. Ne5 Nxe5 15. dxe5 Nd5 16. Ne4 b5 17. c4 bxc4 18. Bxc4 Qd8 19. Rfd1 a5 20. Rac1 Qb6 21. Bxd5 cxd5 22. Nf6+ Kh8 23. Bh4 Bd8 24. Qd2 Kg7 25. Bg5 Be7 26. Nh5+ gxh5 27. Bxe7 f6 28. Bxf8+ Kxf8 29. Qh6+ Kg8 30. exf6 Qa7 31. Rd3 Qf7 32. Rg3+ Kh8 33. Rg7 Qxg7 34. Qxg7# 1-0

[Event "Valdivia op 2nd"]
[Site "Valdivia"]
[Date "2021.09.17"]
[Round "1"]
[White "Bahamondes Ortiz, Benjamin"]
[Black "Arriaza Sanchez, Sergio"]
[Result "1-0"]
[ECO "D94"]
[WhiteElo "2109"]
[PlyCount "73"]
[EventDate "2021.09.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "CHI"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 c6 2. c4 d5 3. Nf3 Nf6 4. e3 g6 5. Nc3 Bg7 6. h3 0-0 7. Qb3 e6 8. Be2 Nbd7 9. 0-0 Qc7 10. Bd2 Re8 11. Rac1 Qb6 12. Qc2 Qd8 13. Rfd1 Qe7 14. Bf1 Qd6 15. e4 dxe4 16. Nxe4 Nxe4 17. Qxe4 Nf6 18. Qh4 Qf8 19. a3 h6 20. Bb4 Re7 21. Ne5 Qe8 22. Bxe7 Qxe7 23. b4 g5 24. Qg3 Ne4 25. Qe3 Nd6 26. g4 Qf6 27. Bg2 a5 28. b5 c5 29. dxc5 Nxb5 30. cxb5 Qxe5 31. Rd8+ Kh7 32. Qd3+ f5 33. c6 bxc6 34. Bxc6 Rb8 35. Rd1 Bf6 36. Rxc8 Rxc8 37. Qd7+ 1-0

