[Event "BOL-ch Seniors"]
[Site "Santa Cruz"]
[Date "2023.03.26"]
[Round "7"]
[White "Costas, Juan Manuel"]
[Black "Caballero Vega, Esther Rosse Mary"]
[Result "1-0"]
[ECO "C40"]
[WhiteElo "1579"]
[PlyCount "85"]
[EventDate "2023.03.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BOL"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d5 3. Nxe5 dxe4 4. Bc4 Be6 5. Bxe6 fxe6 6. Qh5+ g6 7. Nxg6 Nf6 8. Qb5+ Nbd7 9. Nxh8 Rb8 10. Qg5 Qe7 11. Nc3 Qg7 12. Qxg7 Bxg7 13. Nb5 Bxh8 14. Nxc7+ Ke7 15. Nb5 a6 16. Nc3 b5 17. 0-0 Rc8 18. a3 Ng4 19. Nxe4 Rxc2 20. h3 Nge5 21. d4 Nd3 22. Bg5+ Nf6 23. b4 Rc4 24. Nc5 Nxc5 25. dxc5 Kf7 26. Rad1 Kg6 27. Bc1 Ne4 28. f3 Nc3 29. Rde1 Bd4+ 30. Kh1 Kf6 31. Be3 Nd5 32. Bxd4+ Rxd4 33. Rd1 e5 34. Rxd4 exd4 35. Rd1 Ke5 36. g3 h5 37. f4+ Ke4 38. Re1+ Kf3 39. c6 Kxg3 40. Rd1 Kxf4 41. Rxd4+ Ke5 42. Rxd5+ Kxd5 43. c7 1-0

[Event "BOL-ch Seniors"]
[Site "Santa Cruz"]
[Date "2023.03.26"]
[Round "6"]
[White "Lopez Astete, Antonio Armando"]
[Black "Costas, Juan Manuel"]
[Result "0-1"]
[ECO "B07"]
[BlackElo "1579"]
[PlyCount "58"]
[EventDate "2023.03.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BOL"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d6 3. Nf3 Bg4 4. Be2 a6 5. 0-0 c5 6. b3 Nc6 7. h3 Bh5 8. Re1 b5 9. a3 Qb6 10. d3 e6 11. Be3 Be7 12. b4 Rd8 13. g4 Bg6 14. Qc1 Nd7 15. e5 dxe5 16. h4 h5 17. Bg5 f6 18. Be3 hxg4 19. Bxc5 Nxc5 20. bxc5 Bxc5 21. Rb1 gxf3 22. Bf1 Rxh4 23. Na4 Rxa4 24. Re4 Bxe4 25. dxe4 Rxe4 26. Qb2 Kf7 27. Qb3 Bxf2+ 28. Kh1 Rh4+ 29. Bh3 Rxh3# 0-1

[Event "BOL-ch Seniors"]
[Site "Santa Cruz"]
[Date "2023.03.25"]
[Round "5"]
[White "Costas, Juan Manuel"]
[Black "Frederiksen, Eguil E"]
[Result "0-1"]
[ECO "C53"]
[WhiteElo "1579"]
[BlackElo "1442"]
[PlyCount "90"]
[EventDate "2023.03.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BOL"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. b4 Bb6 6. a4 a6 7. a5 Ba7 8. Qb3 Qf6 9. h3 h6 10. b5 axb5 11. Qxb5 Nge7 12. d3 0-0 13. Be3 Bxe3 14. fxe3 Qg6 15. Kf2 Kh8 16. g4 Rb8 17. Nbd2 Be6 18. Ke2 Rfd8 19. Nh4 Qh7 20. Nf5 d5 21. Bb3 d4 22. Bxe6 fxe6 23. Nxe7 Nxe7 24. exd4 exd4 25. c4 Ng6 26. Raf1 c6 27. Qc5 e5 28. Nf3 Re8 29. h4 Qg8 30. h5 Nf4+ 31. Kd2 Qe6 32. g5 Qe7 33. Qxe7 Rxe7 34. gxh6 gxh6 35. Nh4 Kh7 36. Nf5 Rf7 37. Nd6 Rg7 38. Rf2 Ra8 39. Ra1 Nxh5 40. Rf7 Rxf7 41. Nxf7 Rg8 42. Nxe5 Rg2+ 43. Kc1 Rg1+ 44. Kb2 Rxa1 45. Kxa1 Nf4 0-1

[Event "BOL-ch Seniors"]
[Site "Santa Cruz"]
[Date "2023.03.25"]
[Round "4"]
[White "Mancilla Vallejos, Javier"]
[Black "Costas, Juan Manuel"]
[Result "1-0"]
[ECO "B29"]
[WhiteElo "1892"]
[BlackElo "1579"]
[PlyCount "71"]
[EventDate "2023.03.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BOL"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 4. Bc4 e6 5. a4 Nc6 6. Nc3 Nc7 7. Ne4 d5 8. exd6 Bxd6 9. b3 Be7 10. Bb2 0-0 11. h4 f5 12. Ng3 Bf6 13. c3 Na5 14. Qe2 Nd5 15. Nh5 Nc6 16. g3 Bd7 17. Nxf6+ Qxf6 18. 0-0 a6 19. a5 Qg6 20. Bd3 Qg4 21. Kh2 Rae8 22. Ra4 Qh5 23. Ba3 f4 24. Bxc5 Rf7 25. Ng5 Qxe2 26. Bxe2 fxg3+ 27. fxg3 Rxf1 28. Bxf1 h6 29. Ne4 Ne5 30. Ra1 Nf6 31. Nxf6+ gxf6 32. Bg2 Bc6 33. Bxc6 Nxc6 34. Be3 Kg7 35. d4 Ne7 36. g4 1-0

[Event "BOL-ch Seniors"]
[Site "Santa Cruz"]
[Date "2023.03.25"]
[Round "3"]
[White "Suarez Antelo, Jesus"]
[Black "Costas, Juan Manuel"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "1375"]
[BlackElo "1579"]
[PlyCount "69"]
[EventDate "2023.03.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BOL"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 f5 4. Bf4 e6 5. e3 Bd6 6. Nf3 Nf6 7. Ne5 0-0 8. Be2 Ne4 9. h4 Bb4 10. Qc2 Qa5 11. a3 Bxc3+ 12. bxc3 Qxc3+ 13. Qxc3 Nxc3 14. c5 Nd7 15. Bd3 Nxe5 16. Bxe5 Ne4 17. f3 Nf6 18. a4 b6 19. Rc1 Bd7 20. h5 Be8 21. h6 g6 22. g3 Rf7 23. Rh2 Nd7 24. Bd6 bxc5 25. dxc5 Nf6 26. Rb1 Rd7 27. Be5 Kf7 28. Ba6 Rdd8 29. Bb7 Rab8 30. Rbb2 d4 31. exd4 Nd5 32. Bxb8 Rxb8 33. Bxc6 Rxb2 34. Bxe8+ Kxe8 35. Rxb2 1-0

[Event "BOL-ch Seniors"]
[Site "Santa Cruz"]
[Date "2023.03.24"]
[Round "2"]
[White "Costas, Juan Manuel"]
[Black "Monroy Carrizo, Javier"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1579"]
[BlackElo "1810"]
[PlyCount "66"]
[EventDate "2023.03.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BOL"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. h4 h5 5. Bc4 e6 6. d3 a6 7. a4 Bg7 8. Ne2 d5 9. exd5 exd5 10. Ba2 Bg4 11. c3 Bxf3 12. gxf3 d4 13. Qb3 Qe7 14. Bd2 Ne5 15. 0-0-0 Nxd3+ 16. Kc2 0-0-0 17. Ng3 Ne5 18. Rde1 Qc7 19. Bf4 Nh6 20. cxd4 Rxd4 21. Re4 Rhd8 22. Kb1 Rd3 23. Qc2 Rxf3 24. Rc1 Rxf4 25. Rxf4 Nd3 26. Rc4 Kb8 27. Rd1 Nb4 28. Rxb4 Rxd1+ 29. Qxd1 cxb4 30. Bd5 Ng4 31. Ne4 f5 32. Ng5 Nxf2 33. Qf3 Qe5 0-1

[Event "BOL-ch Seniors"]
[Site "Santa Cruz"]
[Date "2023.03.24"]
[Round "1"]
[White "Soliz Medrano, Macedonio"]
[Black "Costas, Juan Manuel"]
[Result "0-1"]
[ECO "B20"]
[BlackElo "1579"]
[PlyCount "60"]
[EventDate "2023.03.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BOL"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Bc4 Nc6 3. Qf3 Ne5 4. Qe2 Nxc4 5. Qxc4 e6 6. Nf3 a6 7. 0-0 b5 8. Qc3 Nf6 9. d3 Be7 10. d4 Nxe4 11. Qd3 d5 12. c3 c4 13. Qc2 Bb7 14. a4 0-0 15. Ne5 f6 16. Nf3 g5 17. h3 Kh8 18. Nbd2 Rg8 19. b4 Qf8 20. Re1 g4 21. hxg4 Rxg4 22. Nxe4 dxe4 23. Nd2 e3 24. Rxe3 Rxg2+ 25. Kf1 Qg8 26. Nf3 Qg4 27. Qe2 Rg8 28. Ke1 Bd6 29. Bd2 Bf4 30. Rxe6 Bxf3 0-1

