[Event "Sao Paulo Hebraica op 29th"]
[Site "Sao Paulo"]
[Date "2022.11.20"]
[Round "5"]
[White "Chrispim, Helmuth Dollinger"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "B57"]
[BlackElo "1177"]
[PlyCount "114"]
[EventDate "2022.11.19"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Bc4 d6 3. Nf3 Nf6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Ne5 7. Bb3 e6 8. 0-0 Be7 9. Bf4 0-0 10. Bxe5 dxe5 11. Nf3 Qc7 12. Nb5 Qc5 13. Nc3 b5 14. Nd2 Bb7 15. a3 Rfd8 16. Qc1 Qd4 17. Nf3 Qc5 18. Qg5 Nxe4 19. Nxe4 Bxe4 20. Qh5 Bxf3 21. Qxf3 Qd4 22. c3 Qd2 23. Qb7 Bf6 24. Rfd1 Qxb2 25. Rxd8+ Rxd8 26. Rd1 Qxb3 27. Rxd8+ Bxd8 28. g3 Qd5 29. Qxa7 g6 30. h3 Kg7 31. a4 bxa4 32. Qxa4 Qd2 33. Qc6 Qd1+ 34. Kg2 Qd5+ 35. Qxd5 exd5 36. Kf3 f5 37. Ke2 Kf6 38. Ke3 Bb6+ 39. Kf3 d4 40. cxd4 exd4 41. Ke2 Ke5 42. Kd3 f4 43. g4 g5 44. f3 h6 45. Kc4 Ba5 46. Kd3 Kd5 47. Kc2 Kc4 48. Kd1 Kd3 49. Kc1 Ke2 50. Kc2 d3+ 51. Kb2 d2 52. h4 d1Q 53. hxg5 Qd2+ 54. Ka3 Qb4+ 55. Ka2 Kd2 56. gxh6 Kc2 57. Ka1 Qb2# 0-1

[Event "Sao Paulo Hebraica op 29th"]
[Site "Sao Paulo"]
[Date "2022.11.20"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Faleiro, Davi Avansi"]
[Result "1-0"]
[ECO "B56"]
[WhiteElo "1177"]
[BlackElo "1747"]
[PlyCount "65"]
[EventDate "2022.11.19"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bb5 a6 7. Nxc6 Qb6 8. Be3 Qc7 9. Nd4+ axb5 10. Ndxb5 Qd8 11. Nd5 Nxd5 12. Qxd5 Ra5 13. Qb3 Bd7 14. Nc3 Ra8 15. Bb6 Be6 16. Qb5+ Bd7 17. Qb4 Qc8 18. Nd5 Ra4 19. Qd2 Bc6 20. Nc7+ Kd7 21. 0-0 e6 22. Rad1 Rxa2 23. e5 Bd5 24. Nxd5 exd5 25. Qxd5 Ra6 26. Qxf7+ Kc6 27. Qc4+ Kd7 28. e6+ Ke7 29. Qxc8 Kf6 30. Bd8+ Be7 31. Bxe7+ Kxe7 32. Qd7+ Kf6 33. e7 1-0

[Event "Sao Paulo Hebraica op 29th"]
[Site "Sao Paulo"]
[Date "2022.11.19"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Borger, David Lupovici"]
[Result "0-1"]
[ECO "B44"]
[WhiteElo "1177"]
[BlackElo "1829"]
[PlyCount "92"]
[EventDate "2022.11.19"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. Be3 Nf6 7. Nd2 d5 8. exd5 Nxd5 9. Bc4 Nxe3 10. fxe3 Bc5 11. Qf3 0-0 12. 0-0-0 Qg5 13. Rde1 Bg4 14. Qg3 Qg6 15. Bd3 Bf5 16. Qxg6 Bxg6 17. e4 Rac8 18. Nc4 Rfd8 19. Ne3 Nb4 20. Nd5 Nxd5 21. exd5 Bxd3 22. cxd3 Bf2+ 23. Kd2 Bxe1+ 24. Rxe1 Rxd5 25. Nc3 Rdc5 26. Re4 Rd8 27. Re3 f6 28. Ne4 Rc6 29. Nc3 a6 30. g4 Rd4 31. h3 h6 32. Ne2 Rd8 33. a3 Kf7 34. Ke1 Rc2 35. b3 Rb2 36. Kf2 Rxb3 37. Nc1 Rc3 38. Re1 Rxa3 39. Ke3 Ra1 40. Kd2 Rc8 41. Rd1 Rcxc1 42. Rxc1 Rxc1 43. Kxc1 Ke6 44. Kd2 b5 45. Kc3 a5 46. Kb3 Kd5 0-1

[Event "Sao Paulo Hebraica op 29th"]
[Site "Sao Paulo"]
[Date "2022.11.19"]
[Round "3"]
[White "Silva, Henrique Brasil Bar"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1800"]
[BlackElo "1177"]
[PlyCount "87"]
[EventDate "2022.11.19"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 e6 6. cxd4 Bb4+ 7. Bd2 Be7 8. Nc3 Nxc3 9. Bxc3 0-0 10. Bd3 f6 11. exf6 Rxf6 12. 0-0 d5 13. Ne5 Nc6 14. f4 Qf8 15. Qg4 Bd6 16. a3 Ne7 17. Bd2 Nf5 18. Bxf5 exf5 19. Qf3 Be6 20. Rac1 Bxe5 21. fxe5 Rg6 22. h3 Qd8 23. Qf4 Qb6 24. Bc3 Rf8 25. Qd2 Qd8 26. Qf4 Rh6 27. Bd2 Rh4 28. Qg5 Qxg5 29. Bxg5 Rxd4 30. Be7 Rc8 31. Rxc8+ Bxc8 32. Rc1 Rc4 33. Rxc4 dxc4 34. Kf2 Kf7 35. Bb4 Ke6 36. Bc3 b5 37. Ke3 g5 38. g3 h5 39. h4 g4 40. Kf4 Bd7 41. Kg5 Be8 42. Kf4 a6 43. Bb4 Bg6 44. Bc3 1/2-1/2

[Event "BRA Amateur-ch U1800"]
[Site "Sao Paulo"]
[Date "2022.11.06"]
[Round "7"]
[White "Laguna, Oscar Alexander San"]
[Black "Bernardo, Henrique Carvalho"]
[Result "0-1"]
[ECO "D95"]
[WhiteElo "1177"]
[BlackElo "1341"]
[PlyCount "108"]
[EventDate "2022.11.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. e3 0-0 6. Qb3 c6 7. Be2 a5 8. cxd5 cxd5 9. Bd3 Nc6 10. a3 Rb8 11. 0-0 Bg4 12. Ne5 Be6 13. Na4 Nxe5 14. dxe5 d4 15. Qb5 Bd7 16. Qb3 Bxa4 17. Qxa4 dxe3 18. exf6 Bxf6 19. Bxe3 Qxd3 20. Qxa5 Bxb2 21. Ra2 Qb3 22. Rxb2 Qxb2 23. Qc5 e5 24. Bh6 Rfc8 25. Qe7 e4 26. Qxe4 Re8 27. Qg4 Qe2 28. Qd4 Qe5 29. Qd2 Rbd8 30. Qc1 Rd4 31. Be3 Rh4 32. h3 h5 33. Bg5 Ra4 34. Bd2 Kh7 35. Bc3 Qf5 36. Bb4 Rc8 37. Qe3 Ra6 38. Qe7 Rb6 39. Qe3 Rbc6 40. Bd2 Qf6 41. Qh6+ Kg8 42. Qe3 Re6 43. Qb3 Rb6 44. Qe3 Rbc6 45. Qb3 R6c7 46. Ba5 b6 47. Bb4 Rc2 48. Qe3 Ra2 49. Rd1 Rcc2 50. Bd2 Qd8 51. Re1 Rxd2 52. Rf1 Rd1 53. Qb3 Rxf1+ 54. Kxf1 Qd2 0-1

[Event "BRA Amateur-ch U1800"]
[Site "Sao Paulo"]
[Date "2022.11.05"]
[Round "6"]
[White "Nunes, Raphael de Camargo"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "E87"]
[WhiteElo "1800"]
[BlackElo "1177"]
[PlyCount "46"]
[EventDate "2022.11.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Nbd7 5. f3 Bg7 6. Be3 0-0 7. Qd2 e5 8. d5 a5 9. Bd3 Nc5 10. Bc2 Ne8 11. 0-0-0 f5 12. Nge2 Nf6 13. h4 fxe4 14. Nxe4 Ncxe4 15. fxe4 Ng4 16. Bg5 Qe8 17. Rdf1 b5 18. cxb5 Qxb5 19. Nc3 Rxf1+ 20. Bd1 Qa6 21. Rxf1 Qxf1 22. Nb5 Qxb5 23. Qc3 Qc5 0-1

[Event "BRA Amateur-ch U1800"]
[Site "Sao Paulo"]
[Date "2022.11.04"]
[Round "3"]
[White "Fantinati, Nilton M Nascimento"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "1460"]
[BlackElo "1177"]
[PlyCount "104"]
[EventDate "2022.11.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. b4 Nf6 2. Bb2 g6 3. b5 Bg7 4. c4 c6 5. a4 0-0 6. Nf3 d5 7. e3 Bf5 8. Nh4 Be6 9. Qb3 Nbd7 10. d4 Ne4 11. Nc3 Nxc3 12. Bxc3 Nb6 13. c5 Nd7 14. Bd3 f5 15. 0-0 Bf7 16. Nf3 Re8 17. Ng5 e5 18. Nxf7 Kxf7 19. Rae1 e4 20. Bc2 Qf6 21. Qb2 Re6 22. Qa3 b6 23. Ba1 Qe7 24. bxc6 Rxc6 25. Qa2 Nf6 26. Bb3 Rd8 27. cxb6 Rxb6 28. Rb1 Bf8 29. Rfc1 Kg7 30. Qc2 Rbb8 31. Qc6 Rbc8 32. Qxc8 Rxc8 33. Rxc8 Qb7 34. Rc2 Qa6 35. h3 Bd6 36. Rbc1 Qd3 37. Rc3 Qe2 38. R3c2 Qh5 39. Rc6 Bf8 40. Rc7+ Kh6 41. Rxa7 Qe2 42. Rac7 Ba3 43. R7c2 Qd3 44. Rc3 Qd2 45. R3c2 Qb4 46. Rb1 Qa5 47. Bb2 Bb4 48. Rbc1 Nd7 49. Bc3 Nb6 50. Bxb4 Qxb4 51. Rc3 Nxa4 52. Bxa4 Qxa4 1/2-1/2

[Event "BRA Amateur-ch U1800"]
[Site "Sao Paulo"]
[Date "2022.11.04"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Nobre, Jose Adalberto Barb"]
[Result "1/2-1/2"]
[ECO "B34"]
[WhiteElo "1177"]
[BlackElo "1566"]
[PlyCount "112"]
[EventDate "2022.11.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Nxc6 bxc6 8. Bd3 d6 9. 0-0 0-0 10. f4 Bd7 11. f5 Qc7 12. Qf3 Rab8 13. b3 Be8 14. Ne2 Nd7 15. Qh3 Ne5 16. Bh6 Bd7 17. Bxg7 Kxg7 18. Rf4 g5 19. Qg3 Kf6 20. Rf2 Rh8 21. Raf1 Rbg8 22. Qh3 h5 23. Qe3 c5 24. Nc3 Bc6 25. Qd2 g4 26. Bb5 Bb7 27. Bc4 Nxc4 28. bxc4 g3 29. Rf3 gxh2+ 30. Kh1 h4 31. Nd5+ Bxd5 32. cxd5 Kg7 33. f6+ exf6 34. Rxf6 Kf8 35. Qf4 Rh7 36. Qxd6+ Qxd6 37. Rxd6 Rg4 38. Rd7 Rhg7 39. Kxh2 Rxg2+ 40. Kh1 Rxc2 41. Rxa7 Rgg2 42. Raxf7+ Ke8 43. Rf8+ Ke7 44. R8f7+ Kd6 45. R1f6+ Ke5 46. Rf5+ Kd4 47. d6 Rh2+ 48. Kg1 Rcg2+ 49. Kf1 Rxa2 50. Rf2 Ra1+ 51. Ke2 Ra2+ 52. Ke1 Ra1+ 53. Ke2 Ra2+ 54. Kf1 Ra1+ 55. Ke2 Ra2+ 56. Kf1 Ra1+ 1/2-1/2

[Event "BRA Amateur-ch U1800"]
[Site "Sao Paulo"]
[Date "2022.11.03"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "Oliveira, Olavo Tadeu Carvalh"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1177"]
[BlackElo "1440"]
[PlyCount "66"]
[EventDate "2022.11.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. Bd3 Nf6 7. 0-0 Be7 8. Re1 d6 9. Qf3 Nbd7 10. Qg3 0-0 11. Bh6 Ne8 12. Bf4 Bf6 13. Nf3 b5 14. e5 dxe5 15. Nxe5 Nxe5 16. Bxe5 Bxe5 17. Rxe5 Bb7 18. Bxh7+ Kxh7 19. Qh4+ Kg8 20. Rh5 f6 21. Rh8+ Kf7 22. Qh5+ Ke7 23. Rh7 Qc6 24. Qh3 b4 25. Ne2 Qxc2 26. Nf4 Qc4 27. Rh4 Rd8 28. Rg4 g5 29. Nh5 Qc2 30. Ng3 Rd1+ 31. Rxd1 Qxd1+ 32. Nf1 a5 33. g3 Qf3 0-1

[Event "BRA-ch Amateur U1600"]
[Site "Sao Paulo"]
[Date "2022.06.18"]
[Round "6"]
[White "Goncalves, Marcel Figueiredo"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "E68"]
[WhiteElo "1584"]
[BlackElo "1183"]
[PlyCount "67"]
[EventDate "2022.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. d4 Bg7 4. Bg2 0-0 5. e4 d6 6. Nc3 Nbd7 7. Nf3 e5 8. 0-0 exd4 9. Nxd4 Nb6 10. b3 Nfd7 11. Bb2 c5 12. Ndb5 Ne5 13. Nxd6 Qc7 14. f4 Nc6 15. e5 Rd8 16. Ncb5 Qe7 17. Qe1 a6 18. Nc3 Be6 19. Ba3 Nb4 20. Bxb4 cxb4 21. Nce4 Nc8 22. Nxb7 Rd4 23. Nbd6 Nxd6 24. Nxd6 Rd8 25. Qxb4 f6 26. Rae1 fxe5 27. fxe5 Qg5 28. Qb6 R4xd6 29. Qxd6 Rxd6 30. exd6 Qc5+ 31. Kh1 Qxd6 32. Rxe6 Qd7 33. Bd5 h5 34. Rd6+ 1-0

[Event "BRA-ch Amateur U1600"]
[Site "Sao Paulo"]
[Date "2022.06.18"]
[Round "5"]
[White "Laguna, Oscar Alexander San"]
[Black "Gimenes, Larissa Lais Grande"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "1183"]
[BlackElo "1800"]
[PlyCount "75"]
[EventDate "2022.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. d4 Nf6 5. Bf4 Bf5 6. Bd3 Bxd3 7. Qxd3 e6 8. 0-0 Bd6 9. Qb5+ Qd7 10. Qxd7+ Kxd7 11. Ne5+ Ke7 12. Bg3 Rd8 13. Nc3 Kf8 14. Nb5 Ne4 15. Nxd6 Nxd6 16. Rac1 Nc6 17. c3 Nc4 18. Nxc4 dxc4 19. f4 f5 20. Rfe1 Re8 21. b3 b5 22. bxc4 bxc4 23. Rb1 a6 24. Rb6 Nd8 25. Bf2 Kg8 26. d5 Kf7 27. d6 Ra7 28. Rd1 Rb7 29. Rxa6 Rd7 30. Ra7 Nb7 31. a4 Red8 32. Bb6 Rb8 33. Bc7 Nxd6 34. Bxb8 Rxa7 35. Bxa7 Ne4 36. Bd4 Nd6 37. a5 Nb7 38. a6 1-0

[Event "BRA-ch Amateur U1600"]
[Site "Sao Paulo"]
[Date "2022.06.16"]
[Round "2"]
[White "Alvim, Beatriz Rosseti"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "E87"]
[BlackElo "1183"]
[PlyCount "86"]
[EventDate "2022.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. f3 g6 4. e4 Bg7 5. Nc3 Nbd7 6. Be3 0-0 7. Qd2 e5 8. d5 a6 9. a4 Nh5 10. g4 Nhf6 11. h4 Nc5 12. Rb1 a5 13. Be2 Nfd7 14. h5 gxh5 15. Rxh5 Nf6 16. Rh1 c6 17. Bh6 Bxh6 18. Qxh6 Re8 19. g5 Nfd7 20. Qxh7+ Kf8 21. g6 Qf6 22. Qh6+ Qg7 23. Qh8+ Qg8 24. g7+ Ke7 25. Qh4+ Nf6 26. Qg5 Bd7 27. Rh6 Kd8 28. Qxf6+ Kc7 29. Rh8 Qxh8 30. gxh8Q Rxh8 31. Qxf7 Raf8 32. Qe7 Re8 33. Qf6 Reg8 34. Kd2 Nb3+ 35. Kc2 Nd4+ 36. Kd3 Rh1 37. f4 Rg3+ 38. Kd2 Nb3+ 39. Kc2 Nd4+ 40. Kd2 Nb3+ 41. Kc2 Nd4+ 42. Kd2 Nb3+ 43. Kc2 Nd4+ 1/2-1/2

[Event "BRA-ch Amateur U1600"]
[Site "Sao Paulo"]
[Date "2022.06.16"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Moritani, Sho"]
[Result "0-1"]
[ECO "B20"]
[WhiteElo "1183"]
[BlackElo "1578"]
[PlyCount "70"]
[EventDate "2022.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. Bc4 a6 5. a4 Nf6 6. e5 Ng4 7. Bb3 Ngxe5 8. 0-0 Nxf3+ 9. Qxf3 Be7 10. d3 d5 11. Bf4 Nd4 12. Qg3 Nf5 13. Qh3 0-0 14. Ne2 Bf6 15. c3 e5 16. Bd2 Nd4 17. Qe3 Nxb3 18. Ra3 Nxd2 19. Qxd2 Be6 20. d4 Qb6 21. dxe5 Bxe5 22. f4 Bf6 23. f5 Bd7 24. Qxd5 Rad8 25. Qb3 Qxb3 26. Rxb3 Bxa4 27. Rxb7 Bb5 28. Re1 Rfe8 29. Kf2 Rd2 30. Rxb5 axb5 31. Kf3 h6 32. Kf2 Rxb2 33. Kf1 Rbxe2 34. Rxe2 Rxe2 35. Kxe2 Bxc3 0-1

[Event "Osasco Carvalho Memorial"]
[Site "Osasco"]
[Date "2022.02.20"]
[Round "5"]
[White "De Oliveira, Yuri Crisostomo"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "E68"]
[WhiteElo "1797"]
[BlackElo "1207"]
[PlyCount "97"]
[EventDate "2022.02.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nbd7 6. d4 0-0 7. 0-0 a6 8. e4 e5 9. d5 Nb6 10. Qd3 Nfd7 11. Be3 Re8 12. b4 a5 13. a3 Qe7 14. Nb5 Nf6 15. c5 dxc5 16. bxc5 Nbxd5 17. exd5 e4 18. d6 exd3 19. dxe7 Rxe7 20. Rad1 Bf5 21. Nbd4 Rd8 22. Nxf5 gxf5 23. Nd4 Ng4 24. Rxd3 Nxe3 25. fxe3 Re5 26. Rfd1 Bh6 27. Kf2 Rde8 28. Re1 Rxc5 29. Bxb7 Rb8 30. Bf3 Re5 31. Nc6 Rb2+ 32. Re2 Reb5 33. Rdd2 Rxd2 34. Rxd2 Rb3 35. Ne7+ Kf8 36. Nxf5 Bg5 37. h4 Be7 38. Nxe7 Kxe7 39. a4 Rb4 40. Bc6 Rc4 41. Bb5 Rc3 42. Rd4 Rc5 43. Ke2 c6 44. Bc4 f5 45. Kd3 Kf6 46. Rd6+ Ke7 47. Rh6 Re5 48. Kd4 c5+ 49. Kxe5 1-0

[Event "Osasco Carvalho Memorial"]
[Site "Osasco"]
[Date "2022.02.20"]
[Round "6"]
[White "Mandaji, Marcelo"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "E70"]
[WhiteElo "1800"]
[BlackElo "1207"]
[PlyCount "104"]
[EventDate "2022.02.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. a3 Nbd7 6. Be3 0-0 7. Nf3 Re8 8. Be2 c5 9. d5 a6 10. 0-0 Qc7 11. a4 e6 12. Qd2 b6 13. Bh6 exd5 14. exd5 Ne5 15. Rfe1 Bd7 16. Rab1 Rac8 17. b3 Bf5 18. Bxg7 Kxg7 19. Rbc1 Re7 20. Nxe5 Rxe5 21. Bf3 Rce8 22. Rxe5 Rxe5 23. Re1 Qe7 24. Rxe5 Qxe5 25. Qe3 Qxe3 26. fxe3 Bc2 27. Bd1 Bxd1 28. Nxd1 Ne4 29. Nf2 Nd2 30. g4 Nxb3 31. Ne4 Na5 32. Nxd6 Kf8 33. e4 Kg7 34. e5 Kf8 35. Kf2 Nb3 36. Nc8 Ke8 37. Nxb6 Na5 38. Ke3 Ke7 39. Kf4 h6 40. Nc8+ Kd7 41. Nd6 f6 42. exf6 Kxd6 43. f7 Ke7 44. d6+ Kxf7 45. Ke5 Nxc4+ 46. Kd5 Nb6+ 47. Kxc5 Nxa4+ 48. Kc6 Ke8 49. Kc7 Nc5 50. Kb6 Nd7+ 51. Kxa6 Ne5 52. Kb7 Kd7 0-1

[Event "Osasco Carvalho Memorial"]
[Site "Osasco"]
[Date "2022.02.19"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "De Macedo, Camila Ferreira"]
[Result "0-1"]
[ECO "B75"]
[WhiteElo "1207"]
[BlackElo "1678"]
[PlyCount "42"]
[EventDate "2022.02.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 a6 8. Qd2 b5 9. Bd3 Bb7 10. 0-0-0 Nc6 11. Nxc6 Bxc6 12. Rhf1 b4 13. Nd5 Bxd5 14. exd5 Qa5 15. a3 Rb8 16. Bc4 0-0 17. Bb3 Rfc8 18. f4 Ne4 19. Qd3 bxa3 20. Qxe4 axb2+ 21. Kb1 Qa1# 0-1

[Event "Osasco Carvalho Memorial"]
[Site "Osasco"]
[Date "2022.02.19"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Tannous, Laura Fonseca de Al"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1207"]
[BlackElo "1183"]
[PlyCount "102"]
[EventDate "2022.02.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Nf3 Bg4 5. Nc3 e6 6. h3 Bh5 7. Be2 Nc6 8. Be3 Bd6 9. Qd2 a6 10. 0-0 h6 11. Rfe1 Nf6 12. a3 0-0 13. Rac1 Rc8 14. Na2 Ne4 15. Qd1 Bxf3 16. Bxf3 Ng5 17. Bxg5 Qxg5 18. Nc3 Ne7 19. Qd3 Nf5 20. Ne2 Rc4 21. b3 Rc6 22. b4 Rfc8 23. Bg4 Ne7 24. Ng3 Rc3 25. Qe2 Bxg3 26. fxg3 h5 27. Bxe6 fxe6 28. Qxe6+ Kh8 29. Qxe7 Qxg3 30. Qxb7 Rxc2 31. Qxc8+ Rxc8 32. Rxc8+ Kh7 33. Re5 g6 34. Rc7+ Kh6 35. Rc5 Qxa3 36. Rcxd5 Qxb4 37. Rd8 Kg7 38. Ree8 Qb1+ 39. Kh2 Qc1 40. Rg8+ Kf6 41. Rdf8+ Ke7 42. d5 h4 43. d6+ Ke6 44. d7 Qc7+ 45. Kh1 Qc1+ 46. Kh2 Qc7+ 47. Kg1 Qb6+ 48. Kf1 Qb1+ 49. Kf2 Qc2+ 50. Kf3 Qd3+ 51. Kg4 Qg3# 0-1

[Event "Osasco Carvalho Memorial"]
[Site "Osasco"]
[Date "2022.02.19"]
[Round "3"]
[White "Rodrigues, Julliano de Araujo"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B56"]
[WhiteElo "1894"]
[BlackElo "1207"]
[PlyCount "61"]
[EventDate "2022.02.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+ Nbd7 7. Nf5 a6 8. Ba4 b5 9. Bb3 Qc7 10. 0-0 Nc5 11. Ng3 Nxb3 12. axb3 Be7 13. Nxb5 Qb7 14. Nxd6+ Bxd6 15. Qxd6 Qe7 16. Qc6+ Nd7 17. Qxa8 0-0 18. Qd5 Nf6 19. Qa5 Bb7 20. Bg5 h6 21. Nf5 Qe6 22. Bxf6 gxf6 23. f3 Rd8 24. Qd2 Qb6+ 25. Kh1 Kf8 26. Qxh6+ Ke8 27. Rfe1 Qc5 28. Qh8+ Qf8 29. Qxf6 Bc6 30. Qxe5+ Qe7 31. Qxe7# 1-0

[Event "Sao Paulo Hebraica op 28th"]
[Site "Sao Paulo"]
[Date "2022.01.16"]
[Round "6"]
[White "Laguna, Oscar Alexander San"]
[Black "Signorelli, Pedro Faveret"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1212"]
[PlyCount "111"]
[EventDate "2022.01.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 d6 5. Nc3 Nf6 6. Be3 a6 7. f3 Be7 8. Bc4 0-0 9. Qd2 Na5 10. Bb3 Nxb3 11. axb3 c6 12. 0-0-0 Bd7 13. f4 b5 14. e5 Ng4 15. exd6 Bxd6 16. Ne4 Bc7 17. h3 Nxe3 18. Qxe3 Bb6 19. Qf3 Qe7 20. Rhe1 Bxd4 21. Rxd4 Be6 22. Nc3 Rac8 23. f5 Qg5+ 24. Rd2 Bxf5 25. Re5 Rcd8 26. Nb1 Rxd2 27. Nxd2 Rd8 28. Qe3 Qxe3 29. Rxe3 h5 30. Re5 g6 31. Rc5 Rd6 32. c4 Re6 33. Nf3 Be4 34. Ng5 Re7 35. Nxe4 Rxe4 36. Kd1 Re6 37. Kd2 b4 38. Ra5 Rd6+ 39. Ke3 c5 40. Rxc5 Kf8 41. Rc8+ Ke7 42. Rb8 a5 43. Ra8 Re6+ 44. Kd4 Rd6+ 45. Kc5 Kd7 46. Ra7+ Ke6 47. Rxa5 Rd2 48. Ra6+ Kd7 49. Kb6 Rxb2 50. c5 Rxg2 51. c6+ Ke6 52. c7 Rc2 53. Kb7+ Kf5 54. Rc6 Rb2 55. c8Q+ Ke5 56. Qh8+ 1-0

[Event "Sao Paulo Hebraica op 28th"]
[Site "Sao Paulo"]
[Date "2022.01.16"]
[Round "5"]
[White "Van Riemsdijk, Marius Rombout"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B94"]
[WhiteElo "1653"]
[BlackElo "1212"]
[PlyCount "71"]
[EventDate "2022.01.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Qc7 7. f4 e5 8. fxe5 dxe5 9. Nf3 Be7 10. Qd2 0-0 11. 0-0-0 Nc6 12. Nd5 Nxd5 13. exd5 Bxg5 14. Qxg5 Nb4 15. c3 Nxa2+ 16. Kb1 Nxc3+ 17. bxc3 Qxc3 18. Qxe5 Bf5+ 19. Qxf5 Qb3+ 20. Kc1 Rac8+ 21. Kd2 Qb4+ 22. Ke2 Qc4+ 23. Kf2 Qc5+ 24. Kg3 b5 25. Bd3 g6 26. Qg4 a5 27. h4 f5 28. Qd4 Qxd4 29. Nxd4 b4 30. Nc6 Ra8 31. Ra1 Rfc8 32. Ne7+ Kf7 33. Nxc8 Rxc8 34. Rxa5 Rc3 35. Rd1 b3 36. Rb5 1-0

[Event "Sao Paulo Hebraica op 28th"]
[Site "Sao Paulo"]
[Date "2022.01.15"]
[Round "3"]
[White "Da Rocha, Lucas Sampaio"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B28"]
[WhiteElo "1657"]
[BlackElo "1212"]
[PlyCount "75"]
[EventDate "2022.01.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 a6 4. Be2 Nf6 5. 0-0 g6 6. Re1 Bg7 7. Bf1 Nbd7 8. d4 cxd4 9. cxd4 e5 10. Nc3 0-0 11. Bg5 h6 12. Bh4 b5 13. a4 bxa4 14. Rxa4 g5 15. Bg3 Nh5 16. dxe5 Nxg3 17. hxg3 dxe5 18. Qa1 g4 19. Nh4 h5 20. Nf5 Nc5 21. Rd1 Qg5 22. Ra3 Bxf5 23. exf5 h4 24. gxh4 Qxh4 25. Bxa6 Bf6 26. g3 Qh7 27. Bf1 Rae8 28. b4 Nb7 29. Rd7 Kg7 30. Rxb7 Rh8 31. Bg2 Qxf5 32. Raa7 e4 33. Rxf7+ Kg6 34. Nxe4 Bxa1 35. Rxf5 Kxf5 36. Nd6+ Ke5 37. Nxe8 Rxe8 38. Rxa1 1-0

[Event "Sao Paulo Hebraica op 28th"]
[Site "Sao Paulo"]
[Date "2022.01.15"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Signorelli, Joao Paulo Dias"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1212"]
[PlyCount "101"]
[EventDate "2022.01.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 Nf6 4. Nc3 d6 5. dxe5 dxe5 6. Bb5 Bd7 7. 0-0 h6 8. Qe2 Bc5 9. Be3 Bb6 10. Rad1 Qe7 11. Nd5 Nxd5 12. exd5 Nb4 13. Bxd7+ Qxd7 14. Bxb6 axb6 15. Qxe5+ Qe7 16. Qg3 Qf6 17. Rfe1+ Kf8 18. Qxc7 Kg8 19. d6 Kh7 20. d7 g6 21. Ne5 Rab8 22. Qd6 Qxd6 23. Rxd6 Nxc2 24. Red1 Rhd8 25. Nxf7 Rf8 26. d8Q Rfxd8 27. Nxd8 h5 28. Rd7+ Kh6 29. Nf7+ Kg7 30. Ng5+ Kh6 31. Nh3 Nb4 32. Re7 Nc6 33. Rf7 Ne5 34. Re7 Nc6 35. Rc7 Ne5 36. Re1 Nc6 37. Ree7 Nxe7 38. Rxe7 Rc8 39. g3 Rc2 40. Rxb7 Rxb2 41. a4 g5 42. a5 b5 43. a6 Ra2 44. Rb6+ Kg7 45. Nxg5 b4 46. Ne6+ Kg8 47. Nd4 Ra1+ 48. Kg2 Ra4 49. Nc6 b3 50. a7 Ra3 51. Rb8+ 1-0

[Event "Sao Paulo Hebraica op 28th"]
[Site "Sao Paulo"]
[Date "2022.01.14"]
[Round "1"]
[White "Dias, Marcelo de Souza"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "1840"]
[BlackElo "1212"]
[PlyCount "61"]
[EventDate "2022.01.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. c4 a6 5. Bxd7+ Qxd7 6. Nc3 Nc6 7. 0-0 Nf6 8. d4 cxd4 9. Nxd4 Nxd4 10. Qxd4 e5 11. Qe3 Qc7 12. b3 Be7 13. Bb2 h6 14. Rac1 Nh7 15. Nd5 Qc5 16. Qxc5 dxc5 17. Nc7+ Kd7 18. Nxa8 Rxa8 19. Bxe5 Kc6 20. Bxg7 Bg5 21. Rcd1 Rg8 22. Be5 Be7 23. Rd5 Ng5 24. f3 h5 25. Kf2 f6 26. Bc3 h4 27. Rfd1 Nf7 28. Rd7 Bd6 29. Rxf7 Bxh2 30. Rxf6+ Kc7 31. Ba5+ 1-0

[Event "Sao Paulo Hebraica op 28th"]
[Site "Sao Paulo"]
[Date "2022.01.14"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "Linardi, Lucas de Toledo"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "1212"]
[PlyCount "63"]
[EventDate "2022.01.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 d6 5. Nc3 Nf6 6. Be3 g6 7. Qd2 Nxd4 8. Bxd4 Bg7 9. 0-0-0 0-0 10. f4 c5 11. Bxc5 Qe7 12. Bxd6 Qe8 13. Bb5 Bd7 14. Bxf8 Bxb5 15. Bxg7 Kxg7 16. f5 Nxe4 17. Nxe4 Qxe4 18. fxg6 hxg6 19. h4 Rc8 20. c3 Bd7 21. h5 Bf5 22. Qd4+ f6 23. Qxe4 Bxe4 24. h6+ Kh7 25. Rd7+ Kh8 26. Rf1 f5 27. g3 a6 28. Rfd1 Rc5 29. Rg7 Bd5 30. b4 Rxc3+ 31. Kb2 Rc8 32. Rxd5 1-0

[Event "Sao Paulo Carnaval op"]
[Site "Sao Paulo"]
[Date "2020.02.25"]
[Round "7"]
[White "Laguna, Oscar Alexander San"]
[Black "Yasuda, Osvaldo Makoto"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1188"]
[BlackElo "1316"]
[PlyCount "142"]
[EventDate "2020.02.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Bb6 6. Nc3 d6 7. Bb5 Bd7 8. Qd2 a6 9. Ba4 Qf6 10. Nxc6 Bxe3 11. Qxe3 bxc6 12. 0-0-0 Ne7 13. h3 0-0 14. g4 Ng6 15. Kb1 Qf4 16. Qd3 Ne5 17. Qd2 Qxd2 18. Rxd2 Rab8 19. Bb3 Be6 20. f4 Nc4 21. Bxc4 Bxc4 22. h4 Rb4 23. b3 Rfb8 24. Rc1 Be6 25. f5 Bd7 26. g5 Re8 27. h5 Re5 28. Rh2 d5 29. exd5 cxd5 30. Rd1 c6 31. a3 Rg4 32. Na4 Rxg5 33. h6 Bxf5 34. hxg7 Kxg7 35. Nc5 Bc8 36. Nd3 Re3 37. Nf4 Bf5 38. Nh5+ Kg6 39. Nf4+ Kf6 40. Rf1 Ke5 41. Rh6 f6 42. Rfh1 Kxf4 43. Rxf6 Rc3 44. Rh2 Ke5 45. Rf7 Bd3 46. Kb2 Bg6 47. Re2+ Kd4 48. Rf4+ Be4 49. Rd2+ Ke3 50. Rxe4+ Kxe4 51. Kxc3 h5 52. Kb4 d4 53. a4 h4 54. Kc4 c5 55. Rh2 Rh5 56. b4 cxb4 57. Rd2 Rd5 58. Rh2 Rh5 59. Kxb4 h3 60. Kc4 Kf3 61. Kxd4 Kg3 62. Rh1 Kg2 63. Ra1 h2 64. c4 h1Q 65. Rxh1 Rxh1 66. Kd5 Rh5+ 67. Ke6 Ra5 68. Kd6 Rxa4 69. c5 Ra1 70. c6 a5 71. c7 Rc1 0-1

[Event "Sao Paulo Carnaval op"]
[Site "Sao Paulo"]
[Date "2020.02.24"]
[Round "5"]
[White "Laguna, Oscar Alexander San"]
[Black "Cordeiro Silva, Marcos Antonio"]
[Result "0-1"]
[ECO "B71"]
[WhiteElo "1188"]
[BlackElo "1582"]
[PlyCount "112"]
[EventDate "2020.02.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nc6 7. Bb5 Bd7 8. Be3 Bg7 9. h3 a6 10. Bxc6 Bxc6 11. Nxc6 bxc6 12. g4 Qa5 13. Qd4 c5 14. Qa4+ Qxa4 15. Nxa4 Nxe4 16. 0-0-0 Rb8 17. Rhg1 a5 18. g5 f5 19. b3 Kf7 20. Nb2 Nc3 21. Nc4 Nxa2+ 22. Kd2 Bc3+ 23. Ke2 a4 24. bxa4 Rb4 25. Nd2 Rxa4 26. Nf1 Bg7 27. Bd2 Rb8 28. Kf3 Ra3+ 29. Ne3 Bd4 30. Rh1 Nc3 31. Bxc3 Rxc3 32. Rd3 Rxd3 33. cxd3 Rb3 34. Rd1 Bxe3 35. Kxe3 c4 36. Kd4 Rxd3+ 37. Rxd3 cxd3 38. Kxd3 e5 39. Ke3 Ke6 40. fxe5 Kxe5 41. Kf3 d5 42. h4 d4 43. Ke2 Ke4 44. Kd2 f4 45. Ke2 f3+ 46. Kf2 d3 47. Ke1 Ke3 48. h5 d2+ 49. Kd1 f2 50. hxg6 f1Q+ 51. Kc2 d1Q+ 52. Kc3 Qfd3+ 53. Kb4 Q1b3+ 54. Kc5 Qbc4+ 55. Kb6 Qdb3+ 56. Ka7 Qca4# 0-1

[Event "Sao Paulo Carnaval op"]
[Site "Sao Paulo"]
[Date "2020.02.24"]
[Round "6"]
[White "Machado, Wesley Henrique"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B55"]
[WhiteElo "1497"]
[BlackElo "1188"]
[PlyCount "65"]
[EventDate "2020.02.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 a6 6. c4 e5 7. Nc2 Be6 8. Nc3 Qc7 9. b3 Be7 10. Be2 b5 11. Ne3 0-0 12. Ncd5 Bxd5 13. Nxd5 Nxd5 14. Qxd5 Nd7 15. 0-0 Qb6+ 16. Kh1 Nf6 17. Qd3 bxc4 18. Qxc4 Rac8 19. Qd3 Rc6 20. Be3 Qb7 21. Rac1 Rfc8 22. Qd2 Bd8 23. Rc4 Bb6 24. Qb4 Nd7 25. Rfc1 a5 26. Qb5 Rxc4 27. Rxc4 Rxc4 28. Bxc4 Qc7 29. Bxb6 Qxb6 30. Qxd7 h6 31. Bxf7+ Kh7 32. Bg6+ Kxg6 33. Qf5# 1-0

[Event "Sao Paulo Carnaval op"]
[Site "Sao Paulo"]
[Date "2020.02.23"]
[Round "4"]
[White "De Souza, Carlos Alberto"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "B95"]
[WhiteElo "1517"]
[BlackElo "1188"]
[PlyCount "132"]
[EventDate "2020.02.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. Qd2 Be7 8. 0-0-0 Nbd7 9. f4 0-0 10. Nf3 b5 11. Bxf6 Nxf6 12. a3 Bb7 13. Qe2 Qb6 14. e5 Nh5 15. g3 dxe5 16. fxe5 Rfd8 17. Bg2 Rac8 18. Ne4 Qc6 19. Nd4 Qc4 20. Qxc4 Rxc4 21. c3 a5 22. Rhg1 Bxe4 23. Bxe4 b4 24. Bd3 Rdxd4 25. Bxc4 Rxc4 26. axb4 axb4 27. Rd4 Rxd4 28. cxd4 g6 29. Rd1 Ng7 30. d5 exd5 31. Rxd5 Ne6 32. Kc2 Ng5 33. Kd1 Nf3 34. h3 Ng5 35. h4 Ne4 36. Rd3 Nf2+ 37. Kd2 Nxd3 38. Kxd3 Kg7 39. Kc4 Kf8 40. Kd5 Ke8 41. Kc6 Kd8 42. b3 Kc8 43. Kd5 Kd7 44. Kd4 Ke6 45. Ke4 f5+ 46. exf6 Kxf6 47. g4 h5 48. g5+ Ke6 49. Kf4 Kd5 50. Ke3 Ke5 51. Kf3 Kf5 52. Kg2 Kg4 53. Kh2 Kxh4 54. Kg2 Kxg5 55. Kf3 h4 56. Kg2 Kg4 57. Kh1 Kf3 58. Kg1 g5 59. Kh2 g4 60. Kg1 g3 61. Kh1 h3 62. Kg1 g2 63. Kh2 Kf2 64. Kxh3 g1R 65. Kh2 Rg3 66. Kh1 Rh3# 0-1

[Event "Sao Paulo Carnaval op"]
[Site "Sao Paulo"]
[Date "2020.02.23"]
[Round "3"]
[White "Laguna, Oscar Alexander San"]
[Black "Nobre, Jailson Altair Barb"]
[Result "0-1"]
[ECO "B41"]
[WhiteElo "1188"]
[BlackElo "1646"]
[PlyCount "75"]
[EventDate "2020.02.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Qc7 6. Nc3 Nf6 7. Be3 Bb4 8. Qd2 Nxe4 9. Qc2 Nxc3 10. bxc3 Be7 11. Bd3 g6 12. Bh6 Bf8 13. Bxf8 Kxf8 14. Qd2 Qe5+ 15. Be2 Kg7 16. 0-0 Nc6 17. f4 Qf6 18. Nb3 d5 19. cxd5 exd5 20. Bf3 Be6 21. Nc5 Na5 22. Rab1 b5 23. Bxd5 Rad8 24. Ne4 Qe7 25. c4 Bxd5 26. cxd5 Qxe4 27. Qxa5 Rxd5 28. Qxa6 Rd2 29. Rf2 Rxf2 30. Kxf2 Qxb1 31. Qa3 Qf5 32. Qc3+ Qf6 33. Qb4 Rd8 34. g3 Qd4+ 35. Qxd4+ Rxd4 36. Ke3 Ra4 37. Kd3 Kf6 38. Kc3 0-1

[Event "Sao Paulo Carnaval op"]
[Site "Sao Paulo"]
[Date "2020.02.22"]
[Round "2"]
[White "Bueno, Jonas Alves"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "E85"]
[WhiteElo "1848"]
[BlackElo "1188"]
[PlyCount "57"]
[EventDate "2020.02.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nbd7 7. Qd2 e5 8. Nge2 a5 9. g4 exd4 10. Nxd4 Ne5 11. Be2 Be6 12. Nd5 Bxd5 13. cxd5 h5 14. h3 Re8 15. 0-0-0 c6 16. gxh5 Nxh5 17. f4 Ng3 18. fxe5 Nxh1 19. Rxh1 Bxe5 20. Bc4 Qc7 21. Kb1 Bxd4 22. Qxd4 cxd5 23. Bxd5 Rac8 24. Qf6 Kh7 25. Qh4+ Kg8 26. Qh6 Qc2+ 27. Ka1 Qg2 28. Rg1 Qh2 29. Rxg6# 1-0

[Event "Sao Paulo Carnaval op"]
[Site "Sao Paulo"]
[Date "2020.02.22"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Dos Santos, Antonio Celso"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "1188"]
[BlackElo "1823"]
[PlyCount "100"]
[EventDate "2020.02.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qe7 5. Nc3 a6 6. Be3 Nf6 7. f3 h6 8. Bc4 d6 9. Nxc6 bxc6 10. Qd2 Be6 11. Bb3 Bxb3 12. cxb3 Qe6 13. 0-0-0 Be7 14. g4 Nd7 15. h4 Ne5 16. Qg2 a5 17. h5 a4 18. bxa4 Nc4 19. Bd2 Bf6 20. b3 Nxd2 21. Qxd2 Qe5 22. Kb2 Qg3 23. Rdf1 Ra5 24. Rhg1 Qe5 25. f4 Qxc3+ 26. Qxc3 Bxc3+ 27. Kxc3 Kd7 28. e5 Rc5+ 29. Kb2 Rd5 30. Rd1 dxe5 31. fxe5 Ke6 32. Rxd5 cxd5 33. Re1 Ra8 34. Kc3 Ra6 35. Kb4 Rc6 36. a3 d4 37. a5 Kd5 38. Kb5 Rc5+ 39. Ka6 c6 40. a4 d3 41. Kb6 Kd4 42. a6 Rxe5 43. Rd1 Kc3 44. a7 Re8 45. a5 Kc2 46. Rxd3 Kxd3 47. Kb7 Re7+ 48. Kb6 Re8 49. Kxc6 Kc3 50. Kb7 Kb4 1/2-1/2

[Event "Sao Paulo Hebraica op 27th"]
[Site "Sao Paulo"]
[Date "2020.01.12"]
[Round "6"]
[White "Davidovici, Ariel Roizenblatt"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "1781"]
[BlackElo "1183"]
[PlyCount "57"]
[EventDate "2020.01.10"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e3 d6 6. e4 Nbd7 7. Bg5 e5 8. d5 Qe8 9. Nb5 Qd8 10. Be2 a6 11. Nc3 Qe8 12. Qd2 Nc5 13. Bd3 Bg4 14. b4 Bxf3 15. gxf3 Ncd7 16. Bh6 Nh5 17. Ne2 Qe7 18. Ng3 Bxh6 19. Qxh6 Nf4 20. 0-0-0 a5 21. b5 Nc5 22. Bc2 c6 23. Rhg1 cxb5 24. Nf5 Qf6 25. cxb5 Ne2+ 26. Kb1 Nxg1 27. Rxg1 Nd7 28. Rg3 Qh8 29. Ne7# 1-0

[Event "Sao Paulo Hebraica op 27th"]
[Site "Sao Paulo"]
[Date "2020.01.12"]
[Round "5"]
[White "Laguna, Oscar Alexander San"]
[Black "Matsura, Eduardo"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "1183"]
[BlackElo "1722"]
[PlyCount "84"]
[EventDate "2020.01.10"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 Nf6 5. Bd3 0-0 6. Be3 Bg4 7. h3 Bxf3 8. gxf3 e5 9. dxe5 dxe5 10. Qd2 Nc6 11. 0-0-0 Nd4 12. f4 Nf3 13. Qe2 Nd4 14. Bxd4 exd4 15. Nb1 Bh6 16. Nd2 Bxf4 17. Rdg1 Nd7 18. h4 Qf6 19. h5 g5 20. Kb1 Ne5 21. Nf3 Nxf3 22. Qxf3 Qe5 23. Rh4 Kh8 24. Rhg4 h6 25. Bc4 f6 26. a3 c6 27. Qb3 b5 28. Bf7 c5 29. Qe6 Rad8 30. Qxe5 Bxe5 31. Bg6 c4 32. Kc1 a5 33. b3 cxb3 34. cxb3 Rc8+ 35. Kd2 Rc3 36. Rb1 Rfc8 37. Rg2 Rc2+ 38. Kd1 d3 39. Bf5 R8c7 40. Bg6 Bf4 41. Be8 Rc1+ 42. Rxc1 Rxc1# 0-1

[Event "Sao Paulo Hebraica op 27th"]
[Site "Sao Paulo"]
[Date "2020.01.11"]
[Round "3"]
[White "Laguna, Oscar Alexander San"]
[Black "Carneiro, Thomas Sobral"]
[Result "0-1"]
[ECO "B76"]
[WhiteElo "1183"]
[BlackElo "1505"]
[PlyCount "134"]
[EventDate "2020.01.10"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. g4 Nxd4 10. Bxd4 Be6 11. h4 Qa5 12. h5 Rfc8 13. hxg6 hxg6 14. Qh2 Bc4 15. g5 Qxg5 16. f4 Qh5 17. Qxh5 Nxh5 18. Bxg7 Kxg7 19. f5 Ng3 20. Rg1 Nxf1 21. Rxf1 Bxf1 22. Kxf1 gxf5 23. exf5 Rc5 24. Ke2 Rxf5 25. Kd3 Rh8 26. Kc4 Rh4+ 27. Kb3 f6 28. a4 e5 29. Nb5 Rf3+ 30. c3 d5 31. Nxa7 d4 32. Rd1 d3 33. Nc8 e4 34. Kc4 Rf2 35. b4 Ra2 36. a5 d2 37. Nd6 e3+ 38. Kd3 Rh3 39. Nf5+ Kg6 40. Nxe3 f5 41. Ke2 Kg5 42. Rg1+ Kf6 43. Nd1 Rh2+ 44. Kf3 Ra1 45. Rf1 Rc1 46. Ke3 Ke5 47. Kd3 f4 48. c4 f3 49. b5 Re2 50. Rxf3 Re1 51. Re3+ Rxe3+ 52. Nxe3 d1Q+ 53. Nxd1 Rxd1+ 54. Kc3 Kd6 55. Kb4 Rb1+ 56. Ka3 Kc5 57. Ka2 Rb4 58. Ka3 Rxc4 59. Kb3 Rb4+ 60. Ka3 Kxb5 61. Ka2 Kxa5 62. Ka3 Kb5 63. Ka2 Kc4 64. Ka3 Kc3 65. Ka2 Rb6 66. Ka1 Kc2 67. Ka2 Ra6# 0-1

[Event "Sao Paulo Hebraica op 27th"]
[Site "Sao Paulo"]
[Date "2020.01.11"]
[Round "4"]
[White "Muniz, Henrique Rocha"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "B90"]
[BlackElo "1183"]
[PlyCount "72"]
[EventDate "2020.01.10"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e5 7. Nf3 Be6 8. 0-0 Be7 9. Be3 0-0 10. Qd2 Nbd7 11. Rae1 b5 12. a3 Nc5 13. Bxc5 dxc5 14. Na2 Bxa2 15. b3 c4 16. Be2 Qxd2 17. Nxd2 cxb3 18. cxb3 Rfd8 19. Rd1 Bxa3 20. Nb1 Rxd1 21. Rxd1 Bxb1 22. Rxb1 Nxe4 23. Ra1 Rc8 24. Bd3 Nd2 25. Be2 Nxb3 26. h3 Nxa1 27. Kh2 f5 28. g4 f4 29. f3 Rc2 30. Kg1 Rxe2 31. Kf1 Rc2 32. Ke1 Bb4+ 33. Kd1 Rf2 34. Kc1 Nb3+ 35. Kb1 Bc3 36. h4 Rb2# 0-1

[Event "Sao Paulo Hebraica op 27th"]
[Site "Sao Paulo"]
[Date "2020.01.10"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Da Rosa, Henrique Jaze Simoe"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1183"]
[BlackElo "1763"]
[PlyCount "98"]
[EventDate "2020.01.10"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 c5 5. c3 Be7 6. Bd3 0-0 7. Nbd2 Nc6 8. Qe2 Qb6 9. Rb1 Qd8 10. 0-0 b6 11. Rbd1 Bb7 12. Rfe1 Rc8 13. Bc2 Re8 14. Ne5 Bd6 15. Nxc6 Bxc6 16. Bg5 Be7 17. Nf3 Bb7 18. Bb1 Qc7 19. Qd3 Ne4 20. Bxe7 Qxe7 21. Nd2 g6 22. Nxe4 dxe4 23. Qd2 Red8 24. Qe2 Qg5 25. dxc5 Qxc5 26. Rxd8+ Rxd8 27. Rd1 Rd5 28. Rxd5 Qxd5 29. a3 Bc6 30. Bc2 Qa2 31. Bd1 Bd5 32. Qc2 Qa1 33. h3 Bc4 34. Qd2 Bb3 35. Qd8+ Kg7 36. Qd4+ Kh6 37. g4 Qxd1+ 38. Qxd1 Bxd1 39. Kf1 Kg5 40. b4 Kf6 41. Ke1 Bb3 42. Kd2 Ke5 43. Kc1 Kd5 44. Kd2 f5 45. g5 e5 46. h4 f4 47. exf4 exf4 48. Ke2 Kc4 49. Kd2 a6 0-1

[Event "Sao Paulo Hebraica op 27th"]
[Site "Sao Paulo"]
[Date "2020.01.10"]
[Round "2"]
[White "Potasso Junior, Alvaro"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1596"]
[BlackElo "1183"]
[PlyCount "103"]
[EventDate "2020.01.10"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 a6 4. a4 d6 5. Bc4 e6 6. Nf3 Nf6 7. d3 Be7 8. 0-0 Bd7 9. Qe1 0-0 10. Qg3 Qc7 11. Be3 Nb4 12. Bb3 b5 13. Nd2 d5 14. exd5 exd5 15. Bf2 c4 16. dxc4 dxc4 17. Ba2 Nxc2 18. Rac1 Nb4 19. Bb1 Nh5 20. Qe3 Bd6 21. g3 Rab8 22. Qe4 Nf6 23. Qe3 Qc8 24. Nde4 Nxe4 25. Nxe4 Bc7 26. axb5 axb5 27. Qd2 Nc6 28. Bc5 Rd8 29. Qc2 f5 30. Nc3 Bb6 31. Bxb6 Rxb6 32. Nxb5 Nb4 33. Na7 Nxc2 34. Nxc8 Rxc8 35. Rxc2 Kf7 36. Rf3 Ba4 37. Rd2 Kf6 38. Rc3 Bb3 39. Bc2 h6 40. Bxb3 Rxb3 41. Rdc2 Rxc3 42. Rxc3 Rb8 43. Rc2 Rb4 44. Kf2 g5 45. Ke3 gxf4+ 46. gxf4 Rb3+ 47. Kf2 Rh3 48. Kg2 Rb3 49. Rxc4 Rxb2+ 50. Kh3 Rb3+ 51. Kg2 Rb2+ 52. Kh3 1/2-1/2

[Event "Osasco Terzian Memorial"]
[Site "Osasco"]
[Date "2019.12.08"]
[Round "5"]
[White "Laguna, Oscar Alexander San"]
[Black "Tsuchie, Davi Pinheiro"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1147"]
[BlackElo "1287"]
[PlyCount "108"]
[EventDate "2019.12.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Bd3 0-0 8. h3 Be6 9. 0-0 Nd7 10. Re1 Nc5 11. Be3 Nxd3 12. cxd3 c5 13. d4 Qc7 14. d5 Bf5 15. c4 h6 16. Qe2 Bf6 17. Rac1 Rfe8 18. Qd2 Qd7 19. b3 Be4 20. Nh2 Bf5 21. Re2 Re7 22. Rce1 Rae8 23. Qa5 a6 24. a3 Qc7 25. Qxc7 Rxc7 26. Bf4 Rxe2 27. Rxe2 Re7 28. Rxe7 Bxe7 29. Nf3 Kf8 30. Kf1 Ke8 31. Ke2 Kd7 32. Kd2 Be4 33. Ke3 f5 34. g4 Bc2 35. Nd2 g5 36. Bh2 f4+ 37. Ke2 Bf6 38. b4 cxb4 39. axb4 Bc3 40. b5 axb5 41. cxb5 Ba4 42. Ne4 Bxb5+ 43. Kd1 Bd4 44. f3 Bc4 45. h4 Bxd5 46. hxg5 Bxe4 47. fxe4 hxg5 48. Kd2 Ke6 49. Kd3 Ke5 50. Bxf4+ Kxf4 51. Kxd4 Kxg4 52. Kd5 Kf4 53. Kxd6 Kxe4 54. Kc5 g4 0-1

[Event "Osasco Terzian Memorial"]
[Site "Osasco"]
[Date "2019.12.07"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Barros, Jardel Teti"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "1147"]
[BlackElo "1439"]
[PlyCount "156"]
[EventDate "2019.12.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Bd3 Nc6 8. 0-0 0-0 9. Be3 Bg4 10. h3 Bh5 11. Be2 Bf6 12. Re1 Re8 13. Nd4 Bg6 14. Bd3 Bxd3 15. Qxd3 Ne5 16. Qd2 Nc4 17. Qd1 Qd7 18. b3 Nb6 19. Rb1 Nd5 20. c4 Nxe3 21. fxe3 Re4 22. Qd2 Rae8 23. c3 Bg5 24. Nc2 Qe6 25. Nd4 Qe5 26. Nf3 Qg3 27. Nxg5 Qxg5 28. Kf2 R8e6 29. Re2 Qh4+ 30. Kg1 Qg3 31. Rbe1 Rh6 32. Kf1 Rf6+ 33. Rf2 Rxf2+ 34. Qxf2 Qxf2+ 35. Kxf2 f5 36. Kf3 Kf7 37. Rd1 Ke6 38. Rd4 Re5 39. e4 g5 40. g4 f4 41. h4 gxh4 42. Kxf4 h3 43. Kg3 h2 44. Kxh2 c5 45. Rd3 Rxe4 46. Rh3 Re2+ 47. Kg3 Re3+ 48. Kg2 Rxh3 49. Kxh3 Ke5 50. Kh4 Kf4 51. g5 a6 52. b4 b6 53. a4 a5 54. b5 Kf5 55. Kh5 Kf4 56. Kh6 Kf5 57. Kxh7 Kxg5 58. Kg7 Kf4 59. Kf6 Ke3 60. Ke6 Kd3 61. Kxd6 Kxc3 62. Kd5 Kb3 63. Kc6 Kxc4 64. Kxb6 Kb4 65. Kc6 c4 66. b6 c3 67. b7 c2 68. b8Q+ Kxa4 69. Qf4+ Kb3 70. Qe3+ Kb2 71. Qd4+ Kb1 72. Qd3 Kb2 73. Qd4+ Kb1 74. Qd3 Kb2 75. Qb5+ Ka2 76. Qd5+ Kb2 77. Qd4+ Kb1 78. Qb6+ Ka2 1/2-1/2

[Event "Osasco Terzian Memorial"]
[Site "Osasco"]
[Date "2019.12.07"]
[Round "3"]
[White "Nobre, Jailson Altair Barb"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1638"]
[BlackElo "1147"]
[PlyCount "59"]
[EventDate "2019.12.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 e6 5. 0-0 Be7 6. d4 cxd4 7. cxd4 0-0 8. Nc3 a6 9. Bf4 Nc6 10. e5 dxe5 11. dxe5 Nd7 12. Bc4 b5 13. Bb3 Bb7 14. Qe2 Rc8 15. Rac1 Qb6 16. Ne4 Na5 17. Bc2 Rc7 18. Qd3 g6 19. Nf6+ Bxf6 20. exf6 Rc4 21. Ne5 Nxe5 22. Bxe5 Rg4 23. Bg3 Rd8 24. Qe2 Rc4 25. Bd3 Rc6 26. Be4 Rxc1 27. Rxc1 Bxe4 28. Qxe4 Qc6 29. Qe3 Nc4 30. Qh6 1-0

[Event "Osasco Terzian Memorial"]
[Site "Osasco"]
[Date "2019.12.06"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "De Souza, Ana Lucia Silva"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "1147"]
[BlackElo "1473"]
[PlyCount "55"]
[EventDate "2019.12.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Ne2 c5 6. c3 Nc6 7. Nf3 Be7 8. Be3 0-0 9. Nf4 Qb6 10. Qb3 Qxb3 11. axb3 cxd4 12. cxd4 Bb4+ 13. Kd1 a6 14. Bd3 b5 15. h4 Nb6 16. g4 Be7 17. Rc1 Nb4 18. Bb1 a5 19. Ng5 h6 20. Nh7 Re8 21. g5 g6 22. Nf6+ Bxf6 23. gxf6 a4 24. Rg1 Bd7 25. Bxg6 fxg6 26. Rxg6+ Kh7 27. Rg7+ Kh8 28. Ng6# 1-0

[Event "Osasco Terzian Memorial"]
[Site "Osasco"]
[Date "2019.12.06"]
[Round "1"]
[White "Nascimento, Gabriela Vitoria"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "1528"]
[BlackElo "1147"]
[PlyCount "120"]
[EventDate "2019.12.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. h3 d6 5. e3 Nbd7 6. Be2 0-0 7. 0-0 Qe8 8. c3 e5 9. dxe5 dxe5 10. Bh2 Qe7 11. Qc2 Nh5 12. Nbd2 f5 13. Nc4 e4 14. Nd4 c5 15. Nb5 Ne5 16. Qb3 Kh8 17. Rad1 a6 18. Nbd6 Be6 19. Bxe5 Bxe5 20. Qxb7 Bxd6 21. Nxd6 Qxb7 22. Nxb7 Rab8 23. Nxc5 Bc8 24. b3 Nf6 25. Bxa6 Bxa6 26. Nxa6 Rbd8 27. c4 Ra8 28. Rd6 Kg7 29. Ra1 Rfd8 30. Rxd8 Rxd8 31. Kf1 Kf7 32. Ke1 Ke6 33. Rd1 Rxd1+ 34. Kxd1 Nh5 35. Kc2 f4 36. exf4 Nxf4 37. Nc5+ Ke5 38. f3 exf3 39. gxf3 Nxh3 40. Nd3+ Kd6 41. b4 h5 42. c5+ Kc7 43. Kd2 Ng5 44. Ke3 Nf7 45. a4 g5 46. Kd4 h4 47. Nf2 Nd8 48. Ng4 Nc6+ 49. Kc4 h3 50. Nh2 Ne5+ 51. Kb5 Nxf3 52. Ng4 h2 53. Nxh2 Nxh2 54. a5 g4 55. a6 g3 56. c6 g2 57. a7 g1Q 58. a8Q Qf1+ 59. Kc5 Qf2+ 60. Kc4 Qc2+ 1/2-1/2

[Event "Sao Paulo ECP op 5th"]
[Site "Sao Paulo"]
[Date "2019.12.01"]
[Round "6"]
[White "Laguna, Oscar Alexander San"]
[Black "Bergamo, Victor Hugo Moura"]
[Result "0-1"]
[ECO "C12"]
[WhiteElo "1147"]
[BlackElo "1510"]
[PlyCount "50"]
[EventDate "2019.11.29"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6 hxg5 7. fxg7 Rg8 8. h3 Bxc3+ 9. bxc3 Qf6 10. c4 c5 11. dxc5 Qc3+ 12. Ke2 Qxc4+ 13. Ke1 Qc3+ 14. Ke2 b6 15. Nf3 Ba6+ 16. Qd3 Bxd3+ 17. cxd3 Qxa1 18. cxb6 axb6 19. h4 gxh4 20. Rxh4 Nc6 21. Rh8 Qxg7 22. Rxg8+ Qxg8 23. d4 Ke7 24. Kd2 Na5 25. Bb5 Nc4+ 0-1

[Event "Sao Paulo ECP op 5th"]
[Site "Sao Paulo"]
[Date "2019.12.01"]
[Round "5"]
[White "Merguizo, Marco Antonio"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "1550"]
[BlackElo "1147"]
[PlyCount "31"]
[EventDate "2019.11.29"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 Bc5 5. Nf3 d6 6. 0-0 Be6 7. b3 0-0 8. Bb2 Qd7 9. e3 d5 10. cxd5 Nxd5 11. Rc1 Nxc3 12. Bxc3 Bd6 13. d4 exd4 14. Nxd4 Nxd4 15. Qxd4 Ba3 16. Qxg7# 1-0

[Event "Sao Paulo ECP op 5th"]
[Site "Sao Paulo"]
[Date "2019.11.30"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Takano Ito, Raphael Kenzo"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "1147"]
[BlackElo "1748"]
[PlyCount "53"]
[EventDate "2019.11.29"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Nf3 Nf6 5. Nc3 Nc6 6. h3 Bf5 7. Bf4 e6 8. Bd3 Bxd3 9. Qxd3 Bd6 10. Ne5 0-0 11. 0-0 Qc7 12. Nb5 Qe7 13. Nxc6 bxc6 14. Bxd6 Qd7 15. Bxf8 Rxf8 16. Nc3 Qd6 17. Na4 e5 18. dxe5 Qxe5 19. Rfe1 Qd6 20. c4 g5 21. c5 Qc7 22. Qf5 Ne4 23. Rxe4 dxe4 24. Qxg5+ Kh8 25. Rd1 f6 26. Qf5 Re8 27. Rd7 1-0

[Event "Sao Paulo ECP op 5th"]
[Site "Sao Paulo"]
[Date "2019.11.29"]
[Round "1"]
[White "Correa, Joao Pedro Vieira"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "1696"]
[BlackElo "1147"]
[PlyCount "95"]
[EventDate "2019.11.29"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. 0-0 Nc6 6. Qe2 a6 7. c3 e6 8. d4 cxd4 9. cxd4 Nce7 10. Nc3 g6 11. Rd1 Bg7 12. a4 Qc7 13. Be3 Nf6 14. Rac1 0-0 15. e5 dxe5 16. dxe5 Nd7 17. Nd5 Qd8 18. Nxe7+ Qxe7 19. Rc7 Rfd8 20. Qd2 Nxe5 21. Rxe7 Rxd2 22. Rxd2 Nxf3+ 23. gxf3 b5 24. axb5 axb5 25. Rdd7 Bxb2 26. Bd4 Bxd4 27. Rxd4 Ra4 28. Rxa4 bxa4 29. Ra7 Kg7 30. f4 Kf6 31. Kg2 h5 32. Kf3 a3 33. Rxa3 Kf5 34. Ra5+ Kf6 35. Ke4 Ke7 36. Ke5 f6+ 37. Ke4 Kd6 38. Ra6+ Ke7 39. h4 Kd7 40. Ra7+ Kd6 41. Rg7 f5+ 42. Ke3 e5 43. Rxg6+ Kd5 44. Rg5 exf4+ 45. Kxf4 Kd4 46. Rxh5 Kd3 47. Kf3 f4 48. Rg5 1-0

[Event "Sao Paulo ECP op 5th"]
[Site "Sao Paulo"]
[Date "2019.11.29"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "Rocha, Anderson Rosendo"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1147"]
[BlackElo "1637"]
[PlyCount "42"]
[EventDate "2019.11.29"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Nbd7 7. f3 e6 8. Bd3 Be7 9. Qd2 0-0 10. a4 Qc7 11. g4 Nb6 12. h4 d5 13. exd5 Nbxd5 14. Nxd5 Nxd5 15. Kf2 Bd6 16. Rag1 e5 17. Nb3 Be6 18. g5 Nxe3 19. Kxe3 e4 20. Ke2 exd3+ 21. Qxd3 Bc4 0-1

[Event "Sao Paulo op-C U1700 8th"]
[Site "Sao Paulo"]
[Date "2019.10.20"]
[Round "5"]
[White "Britto, Andre Bernardo"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "A28"]
[BlackElo "1140"]
[PlyCount "104"]
[EventDate "2019.10.17"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. d3 Nc6 4. Nf3 Bb4 5. g3 d5 6. cxd5 Nxd5 7. Bd2 0-0 8. Bg2 Nxc3 9. bxc3 Bd6 10. 0-0 Qe7 11. d4 Bg4 12. d5 Bxf3 13. Bxf3 Na5 14. e4 Nc4 15. Qe2 Nb6 16. Bg2 f5 17. Rac1 fxe4 18. Bxe4 Nd7 19. c4 Nf6 20. Bb1 Rac8 21. f4 Bc5+ 22. Kh1 exf4 23. Qxe7 Bxe7 24. Bxf4 Nh5 25. Be5 Bf6 26. Bxf6 Rxf6 27. Rxf6 Nxf6 28. Bf5 Rd8 29. Be6+ Kf8 30. Rf1 Ke7 31. Re1 Kd6 32. Rc1 Kc5 33. g4 h6 34. h4 g5 35. hxg5 hxg5 36. Rf1 Rf8 37. Kg2 Nh7 38. Rxf8 Nxf8 39. Bc8 b6 40. Ba6 Ng6 41. Kf3 Kd4 42. Bc8 Ne5+ 43. Kg3 Nxc4 44. Kf3 Kxd5 45. Bb7+ Ke5 46. Ba6 Nd2+ 47. Ke3 Ne4 48. Bb7 Nc5 49. Bc6 a5 50. Kd2 Kf4 51. Kc3 Kxg4 52. Kc4 Kf4 0-1

[Event "Sao Paulo op-C U1700 8th"]
[Site "Sao Paulo"]
[Date "2019.10.20"]
[Round "6"]
[White "Laguna, Oscar Alexander San"]
[Black "De Oliveira, Matheus Gabriel Men"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "1140"]
[BlackElo "1586"]
[PlyCount "98"]
[EventDate "2019.10.17"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bc4 Nxe4 8. Bd2 Nxc3 9. Bxc3 Bxc3+ 10. bxc3 0-0 11. 0-0 e4 12. Nd4 d5 13. Nxc6 bxc6 14. Bb3 a5 15. a4 Re8 16. Re1 Qf6 17. Qd4 Qg6 18. c4 Be6 19. cxd5 cxd5 20. Rad1 Rad8 21. Qc5 Bh3 22. g3 Qf6 23. Qe3 d4 24. Qf4 Qxf4 25. gxf4 Rd6 26. f3 Rg6+ 27. Kf2 Rg2+ 28. Kf1 Rxh2+ 29. Kg1 Rg2+ 30. Kh1 Rf2 31. fxe4 Rxf4 32. Rxd4 Bg4 33. Bd5 h6 34. Kg2 Be6 35. Kg3 g5 36. Bxe6 Rxe6 37. Rd8+ Kg7 38. Rd4 f5 39. Rd7+ Kf6 40. Rh7 Kg6 41. exf5+ Rxf5 42. Rxh6+ Kxh6 43. Rxe6+ Kg7 44. Ra6 Rc5 45. c4 Kf7 46. Kf3 Ke7 47. Ke3 Kd7 48. Kd4 Rf5 49. Ke4 Rc5 1/2-1/2

[Event "Sao Paulo op-C U1700 8th"]
[Site "Sao Paulo"]
[Date "2019.10.19"]
[Round "3"]
[White "Casante, Tatiana de Mendonca"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "1544"]
[BlackElo "1140"]
[PlyCount "136"]
[EventDate "2019.10.17"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bd3 Nf6 5. c4 a6 6. Nc3 e6 7. 0-0 Be7 8. b3 Qc7 9. Bb2 Nc6 10. Rc1 Nb4 11. Bb1 b5 12. cxb5 axb5 13. Qe2 Rb8 14. d4 cxd4 15. Nxd4 Qb6 16. Nf3 0-0 17. Rfd1 Na6 18. e5 dxe5 19. Nxe5 Rfd8 20. Nxd7 Rxd7 21. Rxd7 Nxd7 22. Bxh7+ Kxh7 23. Qd3+ Kg8 24. Qxd7 Bc5 25. Qd2 Rd8 26. Qe2 b4 27. Na4 Qa5 28. g3 Bd4 29. Bxd4 Rxd4 30. Rc4 Rd5 31. Qc2 g6 32. Rc8+ Kg7 33. Ra8 Qc7 34. Qxc7 Nxc7 35. Rc8 Nb5 36. Rc2 Na3 37. Re2 Kf6 38. f3 Re5 39. Kf2 Nb5 40. Rxe5 Kxe5 41. Ke3 f5 42. f4+ Kd5 43. Kd3 Nd4 44. Nb6+ Kc5 45. Nd7+ Kd5 46. Ne5 g5 47. h4 gxh4 48. gxh4 Nb5 49. h5 Nc3 50. Nc4 Ne4 51. h6 Nf6 52. Nb6+ Kc6 53. Nc8 Kd7 54. Na7 Ke7 55. Nc6+ Kf7 56. Nxb4 Nh5 57. Ke3 Nf6 58. a4 Nd7 59. Nd3 Nb6 60. a5 Nd5+ 61. Kd4 Kg6 62. a6 Kxh6 63. a7 Nc7 64. Ke5 Kg7 65. b4 Kf7 66. b5 Ke7 67. b6 Kd7 68. bxc7 Kxc7 1-0

[Event "Sao Paulo op-C U1700 8th"]
[Site "Sao Paulo"]
[Date "2019.10.19"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Ermel Junior, Hercilio"]
[Result "0-1"]
[ECO "B78"]
[WhiteElo "1140"]
[BlackElo "1677"]
[PlyCount "138"]
[EventDate "2019.10.17"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Qd2 0-0 8. f3 Nc6 9. Bc4 Bd7 10. Bb3 Rc8 11. h4 h5 12. 0-0-0 Nxd4 13. Bxd4 b5 14. Kb1 a5 15. Nd5 Nxd5 16. Bxd5 Qc7 17. Bxg7 Kxg7 18. e5 e6 19. exd6 Qxd6 20. Bb7 Qxd2 21. Rxd2 Rc7 22. Rhd1 Bc6 23. Bxc6 Rxc6 24. Kc1 Rfc8 25. c3 b4 26. Re2 bxc3 27. b3 a4 28. b4 Rc4 29. a3 Rxh4 30. Rd6 Rh1+ 31. Rd1 Rxd1+ 32. Kxd1 Kf6 33. Kc2 h4 34. Re3 Ke7 35. Rxc3 Rxc3+ 36. Kxc3 g5 37. b5 Kd6 38. Kd4 f5 39. b6 e5+ 40. Kc4 Kc6 41. b7 Kxb7 42. Kd5 g4 43. fxg4 fxg4 44. Ke4 h3 45. gxh3 gxh3 46. Kf3 Kc6 47. Kg3 Kc5 48. Kxh3 Kc4 49. Kg3 Kb3 50. Kf3 Kxa3 51. Ke4 Kb2 52. Kxe5 a3 53. Kd4 a2 54. Ke4 a1Q 55. Kd5 Qe1 56. Kd4 Qc3+ 57. Ke4 Qc5 58. Kd3 Qb4 59. Ke3 Qc4 60. Kf3 Qd4 61. Kg3 Qe4 62. Kf2 Qd3 63. Kg2 Qe3 64. Kf1 Qd2 65. Kg1 Kc3 66. Kf1 Kd3 67. Kg1 Ke3 68. Kh1 Kf3 69. Kg1 Qg2# 0-1

[Event "Sao Paulo op-C U1700 8th"]
[Site "Sao Paulo"]
[Date "2019.10.18"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "Gomes, Laura Saldanha Cost"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "1140"]
[PlyCount "81"]
[EventDate "2019.10.17"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. Bc4 Nf6 7. Bg5 Be7 8. Bxf6 Bxf6 9. Bxf7 Nb4 10. Bb3 Be6 11. Kd2 Ke7 12. Bxe6 Kxe6 13. Na3 c5 14. c3 Rad8+ 15. Ke2 Nd3 16. Rab1 Rd7 17. g3 a6 18. Rhd1 Rhd8 19. Kf1 b5 20. Ne1 c4 21. b3 Nc5 22. Rxd7 Rxd7 23. bxc4 bxc4 24. Nxc4 Nxe4 25. Rb6+ Ke7 26. Rxa6 Nxc3 27. Ra3 e4 28. Ne3 Rd2 29. Ra7+ Ke6 30. Ra6+ Kf7 31. a3 Ne2 32. Kg2 h5 33. Ra4 Rd1 34. Nxd1 Nd4 35. Nc3 Nf3 36. Nxf3 exf3+ 37. Kxf3 Bxc3 38. Rf4+ Bf6 39. a4 Kg8 40. a5 g5 41. Rxf6 1-0

[Event "Sao Paulo op-C U1700 8th"]
[Site "Sao Paulo"]
[Date "2019.10.17"]
[Round "1"]
[White "Monteiro, Daniel Zotelli"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B86"]
[WhiteElo "1608"]
[BlackElo "1140"]
[PlyCount "101"]
[EventDate "2019.10.17"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bc4 Nf6 4. Nc3 a6 5. a4 e6 6. d4 cxd4 7. Nxd4 Be7 8. 0-0 Qc7 9. Bd3 e5 10. Nb3 Be6 11. Be3 Nbd7 12. Rc1 0-0 13. h3 Nc5 14. Nxc5 dxc5 15. Nd5 Bxd5 16. exd5 c4 17. Be2 Rfd8 18. c3 Nxd5 19. Qc2 Nxe3 20. fxe3 Bg5 21. Qe4 b5 22. Rf5 f6 23. h4 Bh6 24. g4 Rd2 25. Qxa8+ Kf7 26. Qf3 Qe7 27. Qf2 g6 28. Rf3 e4 29. Rg3 Rxb2 30. Bxc4+ bxc4 31. Qxb2 Qc7 32. Kg2 Qa7 33. Qd2 Qb7 34. Rd1 Ke7 35. Qd6+ Ke8 36. Qd8+ Kf7 37. Rd7+ Qxd7 38. Qxd7+ Kf8 39. Qxh7 Bg7 40. Qxg6 f5 41. Qxf5+ Kg8 42. Qd5+ Kh7 43. Qxe4+ Kh8 44. Qxc4 Be5 45. Rf3 Kg7 46. Qf7+ Kh6 47. Qh5+ Kg7 48. Qxe5+ Kg6 49. Rf6+ Kg7 50. Qe7+ Kg8 51. Rf8# 1-0

[Event "Sao Paulo Schutt Cup"]
[Site "Sao Paulo"]
[Date "2019.09.15"]
[Round "5"]
[White "Brujin, Homero"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "1496"]
[BlackElo "1034"]
[PlyCount "155"]
[EventDate "2019.09.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 d6 5. Bg2 Be6 6. b3 Be7 7. 0-0 d5 8. cxd5 Nxd5 9. Bb2 f6 10. Rc1 0-0 11. Ne4 Bf5 12. Nh4 Bxe4 13. Bxe4 g6 14. Qc2 f5 15. Bxd5+ Qxd5 16. Qc4 Qxc4 17. Rxc4 Bxh4 18. gxh4 Rad8 19. Rd1 Rf7 20. e3 e4 21. Bc3 Rd6 22. b4 b5 23. Rc5 a6 24. a3 Nd8 25. Be5 Rc6 26. Rdc1 Rxc5 27. Rxc5 c6 28. Kf1 Kf8 29. Bf4 Rd7 30. Ke2 Ke7 31. Bg5+ Kd6 32. Bxd8 Rxd8 33. h5 Rf8 34. h6 Re8 35. f4 exf3+ 36. Kxf3 Re5 37. Rc2 c5 38. d4 cxd4 39. exd4 Re4 40. Rc8 Rh4 41. Ra8 Rxh2 42. Rxa6+ Kd5 43. Ra5 Rxh6 44. Rxb5+ Kxd4 45. Kg2 Kc3 46. a4 Rh4 47. a5 Rc4 48. a6 Rc7 49. Rb7 Rc8 50. b5 Kb4 51. a7 Ra8 52. b6 Ka5 53. Rb8 Ka6 54. Rxa8 Kxb6 55. Rh8 Kxa7 56. Rxh7+ Kb6 57. Rh6 Kc5 58. Rxg6 Kd4 59. Kf3 Ke5 60. Rg5 Kf6 61. Kf4 Ke6 62. Rxf5 Kd6 63. Ke4 Ke6 64. Ra5 Kd6 65. Kd4 Ke6 66. Rb5 Kd6 67. Rb6+ Kd7 68. Kd5 Kc7 69. Rh6 Kb7 70. Kc5 Kc7 71. Rh7+ Kd8 72. Kd6 Ke8 73. Ke6 Kd8 74. Rg7 Kc8 75. Kd6 Kb8 76. Kc6 Ka8 77. Kb6 Kb8 78. Rg8# 1-0

[Event "Sao Paulo Schutt Cup"]
[Site "Sao Paulo"]
[Date "2019.09.15"]
[Round "6"]
[White "Laguna, Oscar Alexander San"]
[Black "Degenhardt, Victor"]
[Result "1-0"]
[ECO "C66"]
[WhiteElo "1034"]
[BlackElo "1694"]
[PlyCount "51"]
[EventDate "2019.09.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 exd4 5. Nxd4 Bd7 6. Nc3 Nf6 7. 0-0 g6 8. f4 Bg7 9. Re1 0-0 10. Nxc6 bxc6 11. Bd3 c5 12. Bc4 Bc6 13. Bd5 Qd7 14. Bxc6 Qxc6 15. Nd5 Rfe8 16. Nxf6+ Bxf6 17. Qf3 Re7 18. e5 Qxf3 19. gxf3 dxe5 20. fxe5 Rxe5 21. Rxe5 Bxe5 22. c3 Rd8 23. Be3 Bd6 24. Kg2 Re8 25. Re1 Kf8 26. Bh6+ 1-0

[Event "Sao Paulo Schutt Cup"]
[Site "Sao Paulo"]
[Date "2019.09.14"]
[Round "3"]
[White "Laguna, Oscar Alexander San"]
[Black "Jafet Junior, Carlos"]
[Result "0-1"]
[ECO "B34"]
[WhiteElo "1034"]
[BlackElo "1614"]
[PlyCount "74"]
[EventDate "2019.09.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. f3 Qb6 8. Nb3 Qxe3+ 9. Be2 0-0 10. Qd3 Qxd3 11. Bxd3 d6 12. g4 a6 13. h4 h5 14. g5 Nd7 15. Kd2 Nc5 16. Nxc5 dxc5 17. Rab1 Rd8 18. Ke3 b5 19. f4 Bg4 20. e5 Kh7 21. Be4 Rac8 22. Bxc6 Rxc6 23. Ne4 Bf5 24. Rbd1 Rd4 25. Nc3 f6 26. Rxd4 cxd4+ 27. Kxd4 Rc4+ 28. Ke3 fxe5 29. fxe5 Bxe5 30. Nd5 e6 31. Nf6+ Kg7 32. Rd1 Bf4+ 33. Kf2 Rxc2+ 34. Kf1 Bh3+ 35. Kg1 Be3+ 36. Kh1 Bg2+ 37. Kh2 Bf3+ 0-1

[Event "Sao Paulo Schutt Cup"]
[Site "Sao Paulo"]
[Date "2019.09.14"]
[Round "4"]
[White "Viertler, Sabrina Camargo"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B92"]
[WhiteElo "1524"]
[BlackElo "1034"]
[PlyCount "91"]
[EventDate "2019.09.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. a4 Be7 9. Bg5 Nbd7 10. 0-0 0-0 11. Bxf6 Nxf6 12. Re1 Qc7 13. Nd2 Rfd8 14. Nf1 d5 15. exd5 Nxd5 16. Nxd5 Rxd5 17. Qc1 Rc5 18. c3 Bd6 19. Ng3 Bc4 20. Ne4 Rc6 21. Bxc4 Rxc4 22. Nxd6 Qxd6 23. Qe3 Re8 24. Rad1 Qc5 25. Qxc5 Rxc5 26. f4 Kf8 27. fxe5 Rcxe5 28. Rxe5 Rxe5 29. Kf2 Ke7 30. Re1 Rxe1 31. Kxe1 Ke6 32. Ke2 f5 33. b4 g5 34. c4 Ke5 35. Ke3 h5 36. a5 h4 37. b5 axb5 38. cxb5 Kd5 39. a6 bxa6 40. bxa6 Kc6 41. Kd4 Kb6 42. Ke5 g4 43. Kxf5 h3 44. g3 Kxa6 45. Kxg4 Kb6 46. Kxh3 1-0

[Event "Sao Paulo Schutt Cup"]
[Site "Sao Paulo"]
[Date "2019.09.13"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Borger, David Lupovici"]
[Result "1-0"]
[ECO "B28"]
[WhiteElo "1034"]
[BlackElo "1658"]
[PlyCount "85"]
[EventDate "2019.09.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bg5 Qc7 8. Bxf6 Bxc3+ 9. bxc3 Qxc3+ 10. Nd2 gxf6 11. Bd3 d6 12. 0-0 Rg8 13. Nc4 Qd4 14. Qh5 Be6 15. Qxh7 Rg6 16. Ne3 Ke7 17. Nf5+ Bxf5 18. exf5 Rg5 19. Rab1 b6 20. Qh3 Nd7 21. Qe3 Qh4 22. Qe4 Rh5 23. Qxh4 Rxh4 24. Rb3 Ra4 25. Ra1 d5 26. Kf1 a5 27. Bb5 Rb4 28. Bxd7 Kxd7 29. a3 Rxb3 30. cxb3 Rc8 31. h4 Rh8 32. g3 Rh5 33. b4 Rxf5 34. bxa5 bxa5 35. Rb1 Rf3 36. h5 Ke7 37. Kg2 Rxa3 38. Rb8 a4 39. h6 Rb3 40. Ra8 a3 41. h7 Rb8 42. Rxb8 a2 43. Ra8 1-0

[Event "Sao Paulo Schutt Cup"]
[Site "Sao Paulo"]
[Date "2019.09.13"]
[Round "2"]
[White "Lima, Aine Carolina"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B24"]
[WhiteElo "1677"]
[BlackElo "1034"]
[PlyCount "83"]
[EventDate "2019.09.13"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Nf6 5. d3 e6 6. h3 Be7 7. Nge2 a6 8. Be3 Bd7 9. 0-0 0-0 10. Qd2 Qc7 11. f4 d5 12. exd5 exd5 13. d4 cxd4 14. Nxd4 Nxd4 15. Bxd4 Bc5 16. Rad1 Bxd4+ 17. Qxd4 Qc4 18. Nxd5 Qxd4+ 19. Rxd4 Nxd5 20. Rxd5 Bc6 21. Rd2 Bxg2 22. Kxg2 Rac8 23. Re1 h6 24. Re7 Rfd8 25. Rde2 b5 26. c3 Kf8 27. Kf3 Rd3+ 28. R7e3 Rxe3+ 29. Rxe3 Re8 30. Rxe8+ Kxe8 31. Ke4 Ke7 32. Ke5 f6+ 33. Kd5 Kd7 34. b3 g6 35. g4 h5 36. gxh5 gxh5 37. c4 h4 38. c5 b4 39. c6+ Kc7 40. f5 a5 41. Kc5 a4 42. bxa4 1-0

[Event "Sao Paulo STD U2200 op 5th"]
[Site "Sao Paulo"]
[Date "2019.09.01"]
[Round "5"]
[White "Laguna, Oscar Alexander San"]
[Black "Santana, Expedito"]
[Result "1-0"]
[ECO "B18"]
[WhiteElo "1034"]
[BlackElo "1509"]
[PlyCount "70"]
[EventDate "2019.08.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Be3 Nf6 8. Bd3 Bh5 9. Nxh5 Qa5+ 10. Bd2 Qxh5 11. Qxh5 Nxh5 12. 0-0-0 e6 13. Nf3 Nf6 14. Ne5 Nbd7 15. Nxd7 Nxd7 16. g4 0-0-0 17. g5 Nb6 18. Be3 Kb8 19. g6 f6 20. h5 Bd6 21. Rh4 Rhe8 22. f4 Nd5 23. Bd2 Ne7 24. Rf1 Bc7 25. f5 e5 26. dxe5 Bxe5 27. Bf4 Bxf4+ 28. Rfxf4 Nd5 29. Re4 Kc7 30. Kd2 Ne7 31. Re6 Nxf5 32. Rxe8 Rxd3+ 33. Kxd3 Nxh4 34. Re7+ Kb6 35. Rxg7 Nf3 1-0

[Event "Sao Paulo STD U2200 op 5th"]
[Site "Sao Paulo"]
[Date "2019.09.01"]
[Round "6"]
[White "Miranda, Raul"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "B92"]
[WhiteElo "1594"]
[BlackElo "1034"]
[PlyCount "79"]
[EventDate "2019.08.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. Be3 Be7 9. 0-0 Nbd7 10. Nd2 0-0 11. Nc4 Qc7 12. Nd5 Bxd5 13. exd5 b5 14. Na3 Qb7 15. c4 bxc4 16. Nxc4 Qxd5 17. Qa4 Qb5 18. Qd1 Qc6 19. Rc1 Qd5 20. Qc2 Rac8 21. Rfd1 Qe6 22. Qa4 d5 23. Nd2 Rxc1 24. Rxc1 d4 25. Bg5 Nc5 26. Qa5 d3 27. Bd1 Rc8 28. Bb3 Nxb3 29. Rxc8+ Qxc8 30. Nxb3 Qc2 31. g3 h6 32. Qxe5 Ng4 33. Qb8+ Kh7 34. Bd2 Qd1+ 35. Kg2 Qe2 36. Qf4 Bg5 37. Qf5+ Kh8 38. Qc8+ Kh7 39. Qf5+ Kh8 40. Qc8+ 1/2-1/2

[Event "Sao Paulo STD U2200 op 5th"]
[Site "Sao Paulo"]
[Date "2019.08.31"]
[Round "4"]
[White "Guedes, Andre Vieira"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "1250"]
[BlackElo "1034"]
[PlyCount "66"]
[EventDate "2019.08.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nc6 4. Bb5 a6 5. Bxc6+ bxc6 6. 0-0 e6 7. d3 Be7 8. Bf4 Bd7 9. Qd2 d5 10. Be3 d4 11. Bxd4 cxd4 12. Nxd4 Rb8 13. Rab1 Nf6 14. e5 Nd5 15. Nxd5 cxd5 16. Nf3 0-0 17. d4 Bb5 18. Rfe1 Qc7 19. c3 Qc4 20. b3 Qd3 21. Qxd3 Bxd3 22. Rbd1 Bg6 23. c4 dxc4 24. bxc4 Rb4 25. Rc1 Ra4 26. Re2 Bd3 27. Rb2 Ba3 28. Rb3 Bxc1 29. Rxd3 Rxa2 30. h3 Ra1 31. d5 Bf4+ 32. Rd1 Rxd1+ 33. Ne1 Rxe1# 0-1

[Event "Sao Paulo STD U2200 op 5th"]
[Site "Sao Paulo"]
[Date "2019.08.31"]
[Round "3"]
[White "Laguna, Oscar Alexander San"]
[Black "Moreira, Carolina Ziemer Vil"]
[Result "1/2-1/2"]
[ECO "B28"]
[WhiteElo "1034"]
[BlackElo "1102"]
[PlyCount "101"]
[EventDate "2019.08.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. e5 Qa5+ 6. Nc3 Qxe5+ 7. Be3 d5 8. Bd3 Bg4 9. Qd2 e6 10. h3 Bh5 11. f4 Qc7 12. g4 Bg6 13. 0-0-0 Bxd3 14. Qxd3 Bc5 15. f5 Bxd4 16. Bxd4 0-0 17. Bxf6 gxf6 18. Rhg1 Kh8 19. g5 Qf4+ 20. Kb1 fxg5 21. fxe6 fxe6 22. Rdf1 Qd6 23. Rxf8+ Qxf8 24. Qd4+ Qg7 25. Qxg7+ Kxg7 26. Rxg5+ Kf6 27. Rg8 Kf7 28. Rh8 Kg7 29. Re8 Kf7 30. Rc8 Ke7 31. Rc7+ Nd7 32. Rxb7 Rf8 33. a3 Rf1+ 34. Ka2 Rh1 35. Na4 Kd6 36. Ra7 Rxh3 37. Rxa6+ Ke5 38. Nb6 Nxb6 39. Rxb6 h5 40. a4 Rh4 41. b3 Rf4 42. a5 Rf8 43. Rb7 Kf6 44. Rh7 Kg6 45. Re7 Kf6 46. Rh7 Kg6 47. Re7 Kf5 48. Rh7 Kg4 49. Rg7+ Kf5 50. Rh7 Kg6 51. Re7 1/2-1/2

[Event "Sao Paulo STD U2200 op 5th"]
[Site "Sao Paulo"]
[Date "2019.08.30"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Ishikawa, Emilio Keiji"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "1034"]
[BlackElo "1689"]
[PlyCount "108"]
[EventDate "2019.08.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. Nc3 d5 5. e5 h6 6. Be3 e6 7. Be2 Ne7 8. Qd2 b6 9. h3 Ba6 10. Bxa6 Nxa6 11. a3 Nf5 12. g4 Nxe3 13. fxe3 Nc7 14. e4 0-0 15. h4 Rc8 16. g5 h5 17. 0-0-0 Qe7 18. exd5 cxd5 19. Qd3 a6 20. Kb1 b5 21. Na2 a5 22. Qc3 b4 23. axb4 Nb5 24. Qd3 Rb8 25. bxa5 Na3+ 26. Ka1 Nc4 27. b3 Qa3 28. Qc3 Nxa5 29. b4 Qxc3+ 30. Nxc3 Rxb4 31. Na2 Ra4 32. c3 Rb8 33. Nd2 Ra8 34. Kb1 Nc6 35. Nc1 Na5 36. Kc2 Nc4 37. Nxc4 dxc4 38. Kd2 Rd8 39. Ke3 Ra3 40. Ne2 Rda8 41. Rb1 Bf8 42. Rhf1 R8a7 43. Rb8 Kg7 44. Rfb1 Rc7 45. R8b7 Ra7 46. Rxa7 Rxa7 47. Rb5 Ra3 48. d5 exd5 49. Rxd5 Bb4 50. Kd4 Bf8 51. Nf4 Ra1 52. Rb5 Rf1 53. Nd5 Rh1 54. Kxc4 Rxh4+ 0-1

[Event "Sao Paulo STD U2200 op 5th"]
[Site "Sao Paulo"]
[Date "2019.08.30"]
[Round "2"]
[White "Souza, Ramon Santana De"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1558"]
[BlackElo "1034"]
[PlyCount "57"]
[EventDate "2019.08.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 e6 5. Bb5 a6 6. Bxc6+ bxc6 7. e5 d5 8. 0-0 Be7 9. d3 Nh6 10. Bd2 Nf5 11. Qe2 0-0 12. g4 Nd4 13. Nxd4 cxd4 14. Na4 Bd7 15. b4 Qc7 16. f5 exf5 17. gxf5 c5 18. Nxc5 Bxc5 19. bxc5 Qxc5 20. Qg4 Rfe8 21. Bh6 g6 22. Qg5 Qe7 23. fxg6 Qxg5+ 24. Bxg5 hxg6 25. Bf6 Rac8 26. Rf4 Rxc2 27. Rh4 Rg2+ 28. Kxg2 Rxe5 29. Rh8# 1-0

[Event "BRA-ch Amateur U2000"]
[Site "Sao Paulo"]
[Date "2019.06.23"]
[Round "7"]
[White "Laguna, Oscar Alexander San"]
[Black "Fugimoto, Rafael Aoki"]
[Result "1-0"]
[ECO "B48"]
[WhiteElo "1040"]
[PlyCount "77"]
[EventDate "2019.06.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Nc6 7. Qd2 b5 8. Nxc6 Qxc6 9. Bd3 Bb7 10. a3 h6 11. f4 Nf6 12. h3 Be7 13. 0-0-0 0-0 14. e5 Nd5 15. Nxd5 Qxd5 16. Kb1 Qxg2 17. Qxg2 Bxg2 18. Rhg1 Bxh3 19. Rg3 Bf5 20. Bxf5 exf5 21. Rxd7 Rfe8 22. Rd1 Rad8 23. Rdg1 g6 24. e6 fxe6 25. Rxg6+ Kf7 26. Rxh6 Rg8 27. Rh7+ Kf6 28. Bd4+ e5 29. Bxe5+ Ke6 30. Re1 Bd6 31. Rh6+ Kd7 32. Rxd6+ Ke7 33. Rb6 Rg2 34. Rh1 Rgd2 35. Rh7+ Ke8 36. Rbb7 Rd1+ 37. Ka2 Ra1+ 38. Kxa1 Kf8 39. Rh8# 1-0

[Event "BRA-ch Amateur U2000"]
[Site "Sao Paulo"]
[Date "2019.06.22"]
[Round "6"]
[White "Almeida, Bianca Martins"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "B52"]
[BlackElo "1040"]
[PlyCount "114"]
[EventDate "2019.06.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. d3 e6 6. 0-0 Be7 7. Qe2 Ngf6 8. Bg5 h6 9. Bxf6 Nxf6 10. Nbd2 0-0 11. d4 cxd4 12. Nxd4 Qb6 13. N2b3 Rac8 14. c3 Rfd8 15. Nf3 d5 16. exd5 Rxd5 17. Rac1 Qb5 18. Qxb5 Rxb5 19. c4 Rb6 20. Rfd1 Rbc6 21. Ne5 Rd6 22. Rxd6 Bxd6 23. Nd3 b6 24. f3 Kf8 25. Kf2 Bxh2 26. c5 bxc5 27. Nbxc5 Ke7 28. Ke3 Nd7 29. Nxd7 Rxc1 30. Nxc1 Kxd7 31. Ne2 Be5 32. b3 Kd6 33. f4 Bb2 34. g4 Kc5 35. Kd3 Kb4 36. f5 exf5 37. gxf5 Ka3 38. Kc4 Kxa2 39. b4 Ka3 40. b5 Ka4 41. Kc5 Ka5 42. Nf4 Bc1 43. Ng2 Bg5 44. Ne1 Bd8 45. Nf3 a6 46. bxa6 Kxa6 47. Kd6 Kb5 48. Kd7 Bf6 49. Ke8 Kc4 50. Kxf7 Kd3 51. Nh2 Ke4 52. Kg6 Kf4 53. Nf1 h5 54. Kxh5 Kxf5 55. Ne3+ Kf4 56. Ng4 Ke4 57. Kg6 Kd5 1/2-1/2

[Event "BRA-ch Amateur U2000"]
[Site "Sao Paulo"]
[Date "2019.06.22"]
[Round "5"]
[White "De Almeida, Eudson Antonio Peni"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "B80"]
[BlackElo "1040"]
[PlyCount "81"]
[EventDate "2019.06.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e6 7. Be3 Be7 8. Qd2 Nbd7 9. 0-0-0 b5 10. g4 h6 11. h4 Nh7 12. Nc6 Qc7 13. Nxe7 Kxe7 14. g5 h5 15. f4 Nc5 16. Bd3 Nxd3+ 17. Qxd3 Rd8 18. Qe2 g6 19. Rhf1 Kf8 20. Rd2 Bb7 21. f5 exf5 22. exf5 Kg7 23. Bd4+ Kg8 24. fxg6 fxg6 25. Qd3 Nf8 26. Rxf8+ Kxf8 27. Rf2+ Ke7 28. Qxg6 Rf8 29. Qg7+ Ke6 30. Qxc7 Rxf2 31. Bxf2 Bf3 32. Bg3 Bg4 33. Qxd6+ Kf7 34. Qd5+ Kg6 35. Qxa8 Kg7 36. Qc6 Kf7 37. Nd5 Bf3 38. Qf6+ Kg8 39. Ne7+ Kh7 40. g6+ Kh6 41. Ng8# 1-0

[Event "BRA-ch Amateur U2000"]
[Site "Sao Paulo"]
[Date "2019.06.21"]
[Round "3"]
[White "Faria, Juliano Espezim Soa"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "E72"]
[WhiteElo "1706"]
[BlackElo "1040"]
[PlyCount "109"]
[EventDate "2019.06.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 0-0 5. Bg2 d6 6. e4 Nbd7 7. Nge2 c5 8. 0-0 a6 9. h3 Qc7 10. b3 Rb8 11. a4 a5 12. Bb2 Qb6 13. d5 e6 14. dxe6 fxe6 15. Nb5 Ne8 16. Bxg7 Kxg7 17. Ra2 Ndf6 18. Rd2 Rf7 19. Nxd6 Nxd6 20. Rxd6 Qc7 21. Nc3 Bd7 22. Rd3 b6 23. Qe2 Bc6 24. e5 Nd7 25. Bxc6 Qxc6 26. f4 Rd8 27. Rfd1 Rff8 28. Rd6 Qc7 29. Rxe6 Nb8 30. Red6 Rxd6 31. Rxd6 Rd8 32. Nd5 Qc8 33. Rxd8 Qxd8 34. e6 Nc6 35. e7 Qe8 36. Nxb6 Qxe7 37. Qxe7+ Nxe7 38. Nd7 Nc6 39. Nxc5 Nd4 40. Kf2 Kf6 41. g4 Ke7 42. Ke3 Nc6 43. Ke4 Kd6 44. Nd3 Nd8 45. h4 Nf7 46. c5+ Kc6 47. Ne5+ Nxe5 48. Kxe5 Kxc5 49. f5 gxf5 50. gxf5 Kc6 51. Ke6 Kc7 52. Ke7 h5 53. f6 Kc8 54. f7 Kc7 55. f8Q 1-0

[Event "BRA-ch Amateur U2000"]
[Site "Sao Paulo"]
[Date "2019.06.21"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Peres, Sergio Moreira"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "1040"]
[PlyCount "52"]
[EventDate "2019.06.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Bc5 6. Nb3 Ba7 7. Bd3 Nf6 8. Bg5 d6 9. 0-0 Nc6 10. h3 h6 11. Bh4 0-0 12. Re1 Ne5 13. Qd2 Ng6 14. Bg3 e5 15. Rad1 Nh5 16. Bh2 Nhf4 17. Be2 Qh4 18. g3 Nxh3+ 19. Kg2 Nhf4+ 20. Kh1 Qh3 21. gxf4 Nxf4 22. Bf1 Qf3+ 23. Kg1 Nh3+ 24. Bxh3 Bxh3 25. Qg5 hxg5 26. Bg3 Qg2# 0-1

[Event "BRA-ch Amateur U2000"]
[Site "Sao Paulo"]
[Date "2019.06.20"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "Mota, Nataniel Julio Pere"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1040"]
[BlackElo "1920"]
[PlyCount "92"]
[EventDate "2019.06.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Nf3 Bb4 6. Bd2 0-0 7. Be2 c6 8. 0-0 h6 9. Re1 Bf5 10. a3 Bd6 11. Be3 Nbd7 12. Bd3 Ne4 13. Bxe4 dxe4 14. Nd2 Nf6 15. h3 Bc7 16. f3 exf3 17. Nxf3 Re8 18. Qd2 Qd6 19. Rad1 Ne4 20. Nxe4 Bxe4 21. Qf2 Qg6 22. c4 Bg3 23. Qe2 Bxe1 24. Nxe1 Rad8 25. Nf3 Bxf3 26. Qxf3 Qe4 27. Qxe4 Rxe4 28. Bf2 c5 29. d5 Rxc4 30. b3 Rc3 31. b4 b6 32. bxc5 bxc5 33. d6 Rd7 34. a4 f6 35. Rd5 Rc1+ 36. Kh2 Kf7 37. Rxc5 Rxc5 38. Bxc5 Ke6 39. Kg3 a6 40. Kf4 Rb7 41. Ke4 Rb2 42. g4 Ra2 43. d7 Rxa4+ 44. Kd3 Kxd7 45. Bf8 g5 46. Bxh6 Ke7 0-1

[Event "Sao Paulo Moyses Memorial"]
[Site "Sao Paulo"]
[Date "2019.01.27"]
[Round "5"]
[White "Evangelista, Marcos Vinicius Car"]
[Black "Laguna, Oscar Alexander San"]
[Result "1/2-1/2"]
[ECO "C50"]
[BlackElo "1040"]
[PlyCount "39"]
[EventDate "2019.01.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 h6 5. e5 Bc5 6. 0-0 d5 7. exd6 Qxd6 8. Re1+ Nge7 9. Re4 0-0 10. Bf4 Qd8 11. Bxh6 gxh6 12. Qd2 Kg7 13. Rh4 Nf5 14. Rg4+ Kh7 15. Bd3 Be7 16. Qf4 Bg5 17. Bxf5+ Bxf5 18. Qxf5+ Kh8 19. Nxg5 hxg5 20. Rxg5 1/2-1/2

[Event "Sao Paulo Moyses Memorial"]
[Site "Sao Paulo"]
[Date "2019.01.27"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Bokhonok, Oleg"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1040"]
[PlyCount "108"]
[EventDate "2019.01.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. g3 Bg7 4. Bg2 Nf6 5. Nc3 c6 6. Nf3 Qa5 7. 0-0 0-0 8. Bd2 Qb6 9. a4 c5 10. dxc5 dxc5 11. Be3 Qxb2 12. Ne2 Nxe4 13. Rb1 Qa3 14. Ra1 Bxa1 15. Qxa1 Qxa1 16. Rxa1 Nd7 17. Nh4 Nef6 18. Rb1 Rb8 19. Bf4 e5 20. Be3 b6 21. Bg5 Ne4 22. Bxe4 Ba6 23. Nc3 f6 24. Bh6 Rfd8 25. Bd5+ Kh8 26. Ne4 Bb7 27. Bxb7 Rxb7 28. Nd6 Rdb8 29. Nxb7 Rxb7 30. Rd1 a6 31. Rd6 a5 32. Ng2 e4 33. Ne3 Kg8 34. Nd5 Kf7 35. Rc6 b5 36. Rc7 Rxc7 37. Nxc7 b4 38. Nb5 Nb6 39. Nd6+ Ke6 40. Nxe4 Nxa4 41. Bd2 f5 42. Ng5+ Kd5 43. Nxh7 Kd4 44. Kf1 c4 45. Ke1 Nb2 46. Bc1 Kc3 47. Nf8 Kxc2 48. Bg5 Nd3+ 49. Ke2 b3 50. Bf6 c3 51. Ne6 b2 52. h4 b1Q 53. h5 Qe1+ 54. Kf3 Qxf2# 0-1

[Event "Sao Paulo Moyses Memorial"]
[Site "Sao Paulo"]
[Date "2019.01.26"]
[Round "1"]
[White "De Moura, Sergio Jovelino"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2019"]
[BlackElo "1040"]
[PlyCount "57"]
[EventDate "2019.01.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 0-0 6. Bg5 h6 7. Bh4 Be7 8. a4 d6 9. Nbd2 Nh5 10. Nxe5 Nxe5 11. Bxe7 Qxe7 12. 0-0 Nxc4 13. Nxc4 Nf6 14. Ne3 a5 15. f4 c6 16. g4 d5 17. e5 Nd7 18. Nf5 Qe8 19. Re1 Nb6 20. b3 Bxf5 21. gxf5 Qd7 22. Qg4 g6 23. e6 fxe6 24. Rxe6 Qf7 25. Rxg6+ Kh7 26. Qh5 Kh8 27. Rxh6+ Kg7 28. Qg5+ Qg6 29. Qxg6# 1-0

[Event "Sao Paulo Moyses Memorial"]
[Site "Sao Paulo"]
[Date "2019.01.26"]
[Round "3"]
[White "Hartz, Ian"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "C26"]
[BlackElo "1040"]
[PlyCount "32"]
[EventDate "2019.01.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 e5 2. a3 Nf6 3. Nc3 Nc6 4. d3 h6 5. Nf3 Bc5 6. h3 0-0 7. Be2 d6 8. 0-0 Be6 9. Bd2 Qd7 10. Qc1 Bxh3 11. Nh4 Bxg2 12. Nxg2 Qh3 13. Be3 Nd4 14. Qe1 Nxe2+ 15. Qxe2 Ng4 16. f3 Qh2# 0-1

[Event "Sao Paulo Moyses Memorial"]
[Site "Sao Paulo"]
[Date "2019.01.26"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "Ripardo, Paulo Raimundo Volk"]
[Result "0-1"]
[ECO "B56"]
[WhiteElo "1040"]
[PlyCount "92"]
[EventDate "2019.01.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nc6 5. Nxc6 bxc6 6. Nc3 g6 7. Bd3 Bg7 8. 0-0 Nf6 9. Bg5 0-0 10. Qd2 Re8 11. Rfe1 Ng4 12. h3 Ne5 13. Rad1 Bxh3 14. gxh3 Nf3+ 15. Kg2 Nxd2 16. Rxd2 h6 17. Be3 h5 18. Na4 Be5 19. f4 Bf6 20. Kf2 Bh4+ 21. Ke2 Bxe1 22. Kxe1 Qd7 23. Kd1 Qxh3 24. Bf2 Qg4+ 25. Kc1 Qxf4 26. Be1 h4 27. Kb1 h3 28. Nc3 h2 29. a3 h1Q 30. Rd1 Qff3 31. Rc1 Kg7 32. Na2 Rab8 33. Bc3+ f6 34. Rxh1 Qxh1+ 35. Nc1 Rh8 36. Bd2 Qg2 37. Bc3 Rh1 38. b3 e5 39. Kb2 d5 40. exd5 cxd5 41. a4 d4 42. Ba5 g5 43. Na2 Qg1 44. Be4 Qa1+ 45. Ka3 Rb1 46. Bc7 Qb2# 0-1

[Event "Paulista-ch"]
[Site "Sao Paulo"]
[Date "2018.11.10"]
[Round "3"]
[White "Amaral, Danilo Tokechi"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "C51"]
[WhiteElo "1351"]
[BlackElo "1811"]
[PlyCount "55"]
[EventDate "2018.11.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4 Bd4 6. c3 Nf6 7. d3 d6 8. cxd4 exd4 9. 0-0 0-0 10. Bb2 Nxb4 11. Nxd4 c5 12. Qb3 Nxd3 13. Qxd3 cxd4 14. Bxd4 Re8 15. Nc3 b6 16. Nd5 Nxd5 17. Bxd5 Rb8 18. a5 Bb7 19. Bxb7 Rxb7 20. axb6 axb6 21. Rab1 Qc7 22. Qg3 f6 23. Bxf6 Rxe4 24. Qg5 Re6 25. Bd8 Qc5 26. Qg4 Rg6 27. Qa4 Qd5 28. Qe8# 1-0

[Event "Paulista-ch"]
[Site "Sao Paulo"]
[Date "2018.11.10"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Dattoli, Micael Cimet"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "1811"]
[BlackElo "1417"]
[PlyCount "120"]
[EventDate "2018.11.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e6 7. 0-0 Be7 8. Be3 0-0 9. Re1 Nbd7 10. Qe2 Nc5 11. Nb3 Nxd3 12. Qxd3 Bd7 13. f3 Rc8 14. Rad1 Qc7 15. Bg5 Rfd8 16. Bxf6 Bxf6 17. Qxd6 Bxc3 18. Qxc7 Rxc7 19. bxc3 Rdc8 20. Re3 Bb5 21. Nd4 Bc4 22. a3 e5 23. Nb3 h6 24. Rc1 Be6 25. a4 Rxc3 26. Rxc3 Rxc3 27. Na5 b6 28. Nb7 Bb3 29. Nd6 Bxa4 30. Nf5 Rxc2 31. Rxc2 Bxc2 32. Ne3 Bb3 33. Kf2 Kf8 34. Ke2 g6 35. Kd3 Ke7 36. Kc3 Be6 37. Kb2 Kd6 38. Ka3 Kc5 39. Kb2 b5 40. Kc3 b4+ 41. Kb2 a5 42. Nc2 Kc4 43. Na1 a4 44. Nc2 a3+ 45. Nxa3+ bxa3+ 46. Kxa3 Kd3 47. Kb4 Ke2 48. Kc5 Kf2 49. Kd6 Kxg2 50. Ke7 Kxh2 51. Kf8 Kg3 52. Kg7 h5 53. Kf6 h4 54. Kxe5 h3 55. f4 h2 56. f5 gxf5 57. exf5 Bb3 58. Ke4 h1Q+ 59. Ke5 Qc6 60. f6 Qd5# 0-1

[Event "Paulista-ch"]
[Site "Sao Paulo"]
[Date "2018.11.09"]
[Round "1"]
[White "Haraguchi, Matheus Sashaki"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "1585"]
[BlackElo "1811"]
[PlyCount "99"]
[EventDate "2018.11.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. d3 c6 4. Nf3 Qc7 5. Bg5 Bb4 6. Bxf6 Bxc3+ 7. bxc3 gxf6 8. g3 d5 9. cxd5 cxd5 10. Rc1 Nc6 11. Bg2 Be6 12. Nd2 0-0-0 13. 0-0 Kb8 14. Qc2 h5 15. c4 dxc4 16. Nxc4 Bxc4 17. Qxc4 Rc8 18. Bxc6 Qxc6 19. Qxf7 Qe8 20. Qxf6 Rxc1 21. Rxc1 Rf8 22. Qd6+ Ka8 23. Qd5 Qb8 24. Rb1 Rc8 25. a4 Rc6 26. a5 a6 27. Qf7 Rh6 28. Rb6 Rh8 29. Qg7 Rg8 30. Qf7 Rh8 31. Qd5 Rd8 32. Qe4 Rd4 33. Rxa6+ Qa7 34. Rxa7+ Kxa7 35. Qxe5 Ra4 36. Qxh5 Ra1+ 37. Kg2 Ra2 38. Qc5+ Kb8 39. Qd6+ Kc8 40. Qe6+ Kc7 41. Qc4+ Kd7 42. Qxa2 Kc8 43. a6 bxa6 44. Qxa6+ Kd7 45. Kf3 Ke7 46. Ke4 Kf7 47. Ke5 Ke7 48. Qb7+ Kf8 49. Kf6 Kg8 50. Qg7# 1-0

[Event "Paulista-ch"]
[Site "Sao Paulo"]
[Date "2018.11.09"]
[Round "2"]
[White "Laguna, Oscar Alexander San"]
[Black "Laperuta, Renan Portes"]
[Result "0-1"]
[ECO "A24"]
[WhiteElo "1811"]
[BlackElo "1537"]
[PlyCount "108"]
[EventDate "2018.11.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. c4 Nf6 2. d3 g6 3. Nc3 Bg7 4. Nf3 0-0 5. g3 d6 6. Bg2 c6 7. 0-0 e5 8. Bg5 h6 9. Bxf6 Bxf6 10. Qd2 Bg7 11. Rac1 a5 12. Rfd1 f5 13. d4 e4 14. Ne1 Nd7 15. f3 exf3 16. Nxf3 Nf6 17. Qc2 Qe8 18. Qb3 Qe3+ 19. Kf1 Ng4 20. Ne4 fxe4 21. Qxe3 Nxe3+ 22. Ke1 Nxg2+ 23. Kf2 exf3 24. exf3 Bh3 25. g4 Bxg4 26. Kxg2 Bxf3+ 27. Kg1 Bxd1 28. Rxd1 Rf4 29. b3 Bxd4+ 30. Kg2 Raf8 31. Kh3 Rf3+ 32. Kg2 Rf2+ 33. Kh1 Rf1+ 34. Rxf1 Rxf1+ 35. Kg2 Rf2+ 36. Kg3 Rxa2 37. h4 Bf2+ 38. Kg4 Bxh4 39. Kxh4 g5+ 40. Kg3 Kg7 41. Kf3 h5 42. Kg3 h4+ 43. Kh3 Kg6 44. Kg4 Rb2 45. c5 d5 46. b4 Rxb4+ 47. Kf3 g4+ 48. Kg2 h3+ 49. Kh2 Rb2+ 50. Kg3 Kf5 51. Kh4 h2 52. Kg3 Rc2 53. Kh4 h1Q+ 54. Kg3 Rg2# 0-1

[Event "Homs Xeque Mate op"]
[Site "Sao Paulo"]
[Date "2018.10.28"]
[Round "5"]
[White "Bourdoukan, Nicole"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "B23"]
[BlackElo "1811"]
[PlyCount "76"]
[EventDate "2018.10.27"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Qf3 d6 4. h3 Nf6 5. e5 Nxe5 6. Qe3 Nc6 7. Bc4 e5 8. Nf3 Be6 9. d3 Bxc4 10. dxc4 Be7 11. Nd5 Nxd5 12. cxd5 Nd4 13. c3 Nc2+ 14. Kd1 Nxe3+ 15. fxe3 0-0 16. e4 Qd7 17. Bg5 Bxg5 18. Nxg5 Rfe8 19. h4 Qg4+ 20. Ke1 Qxg2 21. Rf1 f6 22. Nf3 Qg3+ 23. Ke2 Qf4 24. Ne1 Qxe4+ 25. Kf2 Qxh4+ 26. Kg2 Qe4+ 27. Nf3 Qxd5 28. b3 e4 29. Rad1 exf3+ 30. Rxf3 Qxd1 31. b4 Qxf3+ 32. Kxf3 Re5 33. a3 cxb4 34. cxb4 Rc8 35. Kf4 Rc1 36. a4 Rf1+ 37. Kg4 Rg5+ 38. Kh4 Rh1# 0-1

[Event "Homs Xeque Mate op"]
[Site "Sao Paulo"]
[Date "2018.10.28"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Haraguchi, Diego Sashaki"]
[Result "1/2-1/2"]
[ECO "B20"]
[WhiteElo "1811"]
[BlackElo "1397"]
[PlyCount "124"]
[EventDate "2018.10.27"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. e4 Bg7 5. d3 Nf6 6. g3 d6 7. Be3 Bg4 8. Bg2 Ne5 9. 0-0 0-0 10. h3 Bxf3 11. Bxf3 Nxf3+ 12. Qxf3 Qd7 13. Kg2 Rac8 14. Rab1 Ne8 15. Qg4 Nf6 16. Qxd7 Nxd7 17. Nd5 Rfe8 18. b4 b6 19. bxc5 Nxc5 20. Bxc5 dxc5 21. h4 e6 22. Nf4 Re7 23. Rfd1 Rd8 24. Rb3 Bh6 25. Ra3 Bxf4 26. gxf4 Rd4 27. Kf3 Kf8 28. Re1 Red7 29. Re3 Kg7 30. Kg4 h5+ 31. Kg3 f6 32. Kf3 e5 33. fxe5 fxe5 34. Ke2 Rf7 35. Rf3 Rdd7 36. Rxf7+ Kxf7 37. Ke3 Kf6 38. f4 a5 39. Rb3 Rd6 40. fxe5+ Kxe5 41. Rb2 Re6 42. Rg2 Rf6 43. Rg5+ Ke6 44. e5 Rf1 45. Rxg6+ Kxe5 46. Rxb6 Rh1 47. Rb5 Rxh4 48. Rxc5+ Kd6 49. Rxa5 Rh1 50. a4 h4 51. Rd5+ Kc6 52. Kf2 h3 53. Rh5 h2 54. Kg2 Rd1 55. Kxh2 Rxd3 56. Kg2 Rd4 57. Kf3 Rxc4 58. a5 Ra4 59. Ke3 Kb7 60. Kd3 Ka6 61. Kc3 Rxa5 62. Rxa5+ Kxa5 1/2-1/2

[Event "Homs Xeque Mate op"]
[Site "Sao Paulo"]
[Date "2018.10.27"]
[Round "3"]
[White "Da Rosa, Henrique Jaze Simoe"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "1459"]
[BlackElo "1811"]
[PlyCount "113"]
[EventDate "2018.10.27"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 g6 5. b3 Bg7 6. Bb2 0-0 7. 0-0 dxc4 8. bxc4 Nc6 9. d4 Re8 10. Qc2 Ng4 11. h3 Nh6 12. Rd1 Nf5 13. e3 Bd7 14. Nc3 e5 15. dxe5 Nxe5 16. Nxe5 Bxe5 17. Bxb7 Rb8 18. Bc6 Re7 19. Ba3 Bd6 20. Bxd6 Nxd6 21. Ne2 Bxc6 22. c5 Qd7 23. cxd6 cxd6 24. Rdc1 Bb7 25. Kh2 Rc8 26. Qd2 Rxc1 27. Rxc1 Bc8 28. Ng1 Qb7 29. Qxd6 Rd7 30. Qc5 Rd8 31. Qc7 Qxc7 32. Rxc7 Be6 33. Rxa7 Rd2 34. Kg2 Rxa2 35. Rxa2 Bxa2 36. e4 Kg7 37. f4 f5 38. e5 Kf7 39. Nf3 Bd5 40. g4 fxg4 41. hxg4 Ke6 42. Kg3 Bxf3 43. Kxf3 h6 44. Kg3 g5 45. Kf3 Kd5 46. Ke3 gxf4+ 47. Kxf4 Ke6 48. Ke4 Kd7 49. Kf5 Ke7 50. e6 Ke8 51. Kf6 Kf8 52. e7+ Ke8 53. Ke6 h5 54. g5 h4 55. g6 h3 56. g7 h2 57. g8Q# 1-0

[Event "Homs Xeque Mate op"]
[Site "Sao Paulo"]
[Date "2018.10.27"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Sato, Claudio Takeshi"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1811"]
[BlackElo "1542"]
[PlyCount "70"]
[EventDate "2018.10.27"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 b6 2. d4 Bb7 3. Nc3 e6 4. Nf3 Bb4 5. Bd3 Nf6 6. e5 Ne4 7. Bxe4 Bxe4 8. 0-0 Bb7 9. a3 Be7 10. Be3 d6 11. exd6 cxd6 12. Nd2 0-0 13. Nb3 Nd7 14. d5 e5 15. Re1 f5 16. f4 Bf6 17. Qd2 Rc8 18. Rad1 a6 19. Rf1 b5 20. fxe5 Bxe5 21. Bf4 Nb6 22. Bxe5 dxe5 23. d6 Nc4 24. Qc1 Qb6+ 25. Kh1 Ne3 26. d7 Rcd8 27. Rf2 Nxd1 28. Nxd1 Rxd7 29. Qb1 Rxd1+ 30. Qxd1 Qxf2 31. Qg1 Qxc2 32. Na5 Be4 33. b4 Rd8 34. h4 Rd1 35. Qxd1 Qxg2# 0-1

[Event "Sao Paulo STD U2200 op 3rd"]
[Site "Sao Paulo"]
[Date "2018.10.14"]
[Round "5"]
[White "Laguna, Oscar Alexander San"]
[Black "Barberi, Catarina"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1811"]
[BlackElo "1154"]
[PlyCount "66"]
[EventDate "2018.10.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Nc6 6. Bd3 Bd7 7. dxc5 Bxc5 8. 0-0 0-0-0 9. Qb3 Qc7 10. Bf4 f6 11. exf6 Qxf4 12. fxg7 Nf6 13. gxh8Q Rxh8 14. Nbd2 Ne5 15. Nxe5 Qxe5 16. Rfe1 Qf4 17. Nf3 Rg8 18. Be2 Ne4 19. Rf1 Ng5 20. Nxg5 Rxg5 21. Qc2 Bd6 22. Qxh7 Rg7 23. Qh8+ Kc7 24. f3 Bc5+ 25. Kh1 Bd6 26. g3 Qg5 27. f4 Qg6 28. Bd3 Qg4 29. Qh4 Qxh4 30. gxh4 d4 31. cxd4 Bc6+ 32. Be4 Bxe4+ 33. Rf3 Bxf3# 0-1

[Event "Sao Paulo STD U2200 op 3rd"]
[Site "Sao Paulo"]
[Date "2018.10.13"]
[Round "3"]
[White "Da Rosa, Henrique Jaze Simoe"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "A09"]
[WhiteElo "1459"]
[BlackElo "1811"]
[PlyCount "73"]
[EventDate "2018.10.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nc6 4. Qxc4 Nf6 5. g3 e5 6. Bg2 Be6 7. Qa4 Bd6 8. 0-0 Qd7 9. Ng5 0-0-0 10. Nxe6 fxe6 11. Nc3 Kb8 12. a3 Nd4 13. Qc4 Nc6 14. b4 Nd4 15. e3 Nc2 16. Ra2 Nxb4 17. axb4 Qe7 18. Qb5 c6 19. Bxc6 Bxb4 20. Rb2 Bxc3 21. dxc3 b6 22. Qxe5+ Qd6 23. Qb5 Rc8 24. Bf3 Rxc3 25. Rd1 Qc7 26. Bd2 Rc5 27. Qb3 Re8 28. Rbb1 g5 29. Bb4 Rb5 30. Bd6 Rxb3 31. Bxc7+ Kxc7 32. Rxb3 g4 33. Bg2 Kb8 34. Rbd3 a5 35. Rd8+ Rxd8 36. Rxd8+ Ka7 37. Ra8# 1-0

[Event "Sao Paulo STD U2200 op 3rd"]
[Site "Sao Paulo"]
[Date "2018.10.13"]
[Round "4"]
[White "Laguna, Oscar Alexander San"]
[Black "Haraguchi, Diego Sashaki"]
[Result "0-1"]
[ECO "B35"]
[WhiteElo "1811"]
[BlackElo "1397"]
[PlyCount "66"]
[EventDate "2018.10.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Qd2 Ng4 9. Nxc6 bxc6 10. 0-0 Qc7 11. f4 Nxe3 12. Qxe3 c5 13. Rab1 Bd4 14. Qxd4 cxd4 15. Bd5 Ba6 16. Rfd1 dxc3 17. Bxa8 Rxa8 18. bxc3 Qxc3 19. Rxd7 Qxc2 20. Re1 Qc5+ 21. Kh1 Bb5 22. Rd5 Qc3 23. Rg1 Bc6 24. Re5 e6 25. Rg5 Bxe4 26. Rg3 Qd2 27. a4 Rc8 28. h3 Rc1 29. Rxc1 Qxc1+ 30. Kh2 Bc6 31. Rd3 Qxf4+ 32. Kh1 Qf1+ 33. Kh2 Qxd3 0-1

[Event "Sao Paulo STD U2200 op 3rd"]
[Site "Sao Paulo"]
[Date "2018.10.12"]
[Round "2"]
[White "Gomes, Emerson De Lima"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "1562"]
[BlackElo "1811"]
[PlyCount "63"]
[EventDate "2018.10.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Nd5 5. cxd5 Nb4 6. Nxe5 d6 7. Nf3 c6 8. a3 Nxd5 9. Nxd5 cxd5 10. Qb3 Be6 11. Bb5+ Bd7 12. Qxd5 Bxb5 13. Qxb5+ Qd7 14. Qxd7+ Kxd7 15. b4 Rc8 16. Nd4 Kc7 17. Bb2 Kb8 18. Ke2 Rg8 19. Rac1 Rxc1 20. Rxc1 d5 21. Nb5 a6 22. Be5+ Bd6 23. Bxd6+ Ka8 24. Nc7+ Ka7 25. Nxd5 f5 26. Ne7 Re8 27. Nxf5 g6 28. Nd4 Rd8 29. Bc5+ Ka8 30. Bb6 Rb8 31. Ne6 h5 32. Nc7# 1-0

[Event "Sao Paulo STD U2200 op 3rd"]
[Site "Sao Paulo"]
[Date "2018.10.12"]
[Round "1"]
[White "Laguna, Oscar Alexander San"]
[Black "Mascarenhas, Alfredo C Viana"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1811"]
[BlackElo "1783"]
[PlyCount "56"]
[EventDate "2018.10.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bg4 6. Be3 e6 7. Nbd2 Qb6 8. h3 Bh5 9. Qc2 cxd4 10. Bxd4 Bc5 11. Bxc5 Qxc5 12. Nb3 Qb6 13. g4 Bg6 14. Bd3 Rc8 15. Bxg6 hxg6 16. 0-0-0 Nb4 17. Qb1 Qxf2 18. Rhf1 Qe3+ 19. Rd2 Rxh3 20. Kd1 Rxf3 21. Rxf3 Qxf3+ 22. Re2 Nd3 23. Kd2 Nf4 24. Re3 Qf2+ 25. Re2 Qxe2+ 26. Kc1 Qf1+ 27. Kd2 Qd3+ 28. Kc1 Ne2# 0-1

[Event "Sao Paulo U16 3rd"]
[Site "Sao Paulo"]
[Date "2018.06.10"]
[Round "5.9"]
[White "Bokhonok, Tatiana dos Santos"]
[Black "Laguna, Oscar Alexander San"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "62"]
[EventDate "2018.06.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Ng5 Qxg5 5. 0-0 Qd8 6. h3 Nf6 7. Bd3 0-0 8. Nc3 d6 9. Bb5 Nd4 10. Na4 Nxb5 11. Nxc5 dxc5 12. Qe2 Nd4 13. Qd3 b6 14. Qc4 Be6 15. Qc3 Ne2+ 16. Kh1 Nxc3 17. dxc3 Qd7 18. Bg5 Bxh3 19. gxh3 Qxh3+ 20. Kg1 Qg4+ 21. Kh1 Qxg5 22. Rac1 Qh4+ 23. Kg2 Qg4+ 24. Kh2 Nxe4 25. f3 Qh4+ 26. Kg2 Qg3+ 27. Kh1 Nf2+ 28. Rxf2 Qxf2 29. Rg1 Rfd8 30. b4 Rd2 31. Rg2 Qxg2# 0-1

[Event "Sao Paulo U16 3rd"]
[Site "Sao Paulo"]
[Date "2018.06.10"]
[Round "4.10"]
[White "Laguna, Oscar Alexander San"]
[Black "Lacerda, Lucas Felisberto"]
[Result "1-0"]
[ECO "C48"]
[PlyCount "67"]
[EventDate "2018.06.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. 0-0 Nf6 5. Bxc6+ bxc6 6. Nc3 Bg4 7. h3 Bh5 8. d3 d5 9. exd5 cxd5 10. Bg5 Bxf3 11. Qxf3 d4 12. Bxf6 gxf6 13. Ne4 Be7 14. Rfe1 f5 15. Qxf5 f6 16. Qh5+ Kd7 17. Qd1 Qf8 18. c3 f5 19. Qa4+ c6 20. Ng3 Qf6 21. cxd4 Bd6 22. dxe5 Bxe5 23. Nh5 Qg6 24. Rxe5 Rhg8 25. Qd4+ Kc8 26. Ng3 Re8 27. Rxe8+ Qxe8 28. Nxf5 Kc7 29. Qd6+ Kb7 30. Nd4 Rd8 31. Qb4+ Kc8 32. Rc1 Qg6 33. Rxc6+ Kd7 34. Rxg6 1-0

[Event "Sao Paulo U16 3rd"]
[Site "Sao Paulo"]
[Date "2018.06.09"]
[Round "2.7"]
[White "Laguna, Oscar Alexander San"]
[Black "Hayashi, Kouki"]
[Result "0-1"]
[ECO "B25"]
[BlackElo "1338"]
[PlyCount "118"]
[EventDate "2018.06.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. g3 g6 5. Bg2 Bg7 6. 0-0 0-0 7. d3 Nc6 8. Be3 Rb8 9. Re1 b5 10. Qd2 Ng4 11. Bh3 Nxe3 12. Bxc8 Qxc8 13. Qxe3 Nd4 14. Rac1 b4 15. Ne2 Nxf3+ 16. Qxf3 Bxb2 17. Rb1 Bg7 18. Rb3 Qa6 19. Reb1 Qxa2 20. c3 Qa4 21. d4 cxd4 22. Nxd4 Bxd4 23. cxd4 a5 24. Qd1 Rfc8 25. Ra1 Qb5 26. Rab1 Qc4 27. Qd3 Qxd3 28. Rxd3 a4 29. Ra1 Ra8 30. d5 Rc4 31. f3 a3 32. Rb3 Ra4 33. Kf2 Rc2+ 34. Ke3 Rb2 35. Rxb2 axb2 36. Rb1 Ra3+ 37. Ke2 Ra2 38. Kd1 Ra1 39. Kc2 Rxb1 40. Kxb1 Kg7 41. Kxb2 f5 42. exf5 gxf5 43. f4 Kg6 44. h3 h5 45. h4 Kf6 46. Kb3 e6 47. dxe6 Kxe6 48. Kxb4 Kd5 49. Kc3 Ke4 50. Kc4 d5+ 51. Kc3 d4+ 52. Kd2 d3 53. Kd1 Ke3 54. Ke1 d2+ 55. Kd1 Kd3 56. g4 fxg4 57. f5 g3 58. f6 g2 59. f7 g1Q# 0-1

[Event "Sao Paulo U16 3rd"]
[Site "Sao Paulo"]
[Date "2018.06.09"]
[Round "1.8"]
[White "Stumpf, Luis Felipe T Cale"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "C66"]
[WhiteElo "1822"]
[PlyCount "111"]
[EventDate "2018.06.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. 0-0 Be6 6. Nc3 a6 7. Ba4 Be7 8. Bd2 0-0 9. Qc1 Nd4 10. Nxd4 exd4 11. Ne2 c5 12. c3 dxc3 13. Nxc3 b5 14. Bc2 b4 15. Ne2 a5 16. Ba4 Bd7 17. Bc2 Qc7 18. Bg5 Rfe8 19. Bxf6 Bxf6 20. Nf4 Be5 21. Nd5 Qd8 22. Rb1 Be6 23. Ba4 Rf8 24. Bb3 Bxd5 25. Bxd5 Ra6 26. Qc4 Rb6 27. Qb3 Qf6 28. a4 Qh6 29. h3 Qf4 30. Rfe1 Bd4 31. Re2 Be5 32. Ree1 Qh2+ 33. Kf1 Qh1+ 34. Ke2 Qxg2 35. Rg1 Qxh3 36. Rg5 Qd7 37. Rbg1 h6 38. R5g2 Qh3 39. Kd2 Bf4+ 40. Kc2 g5 41. Rg4 Bh2 42. R1g2 Bf4 43. Rg1 Bh2 44. R1g2 Qh5 45. f4 Bxf4 46. Rxf4 Qg6 47. Rff2 Rbb8 48. Rh2 Kg7 49. Rh1 Rh8 50. Rxf7+ Qxf7 51. Bxf7 Rbf8 52. Bd5 Rf2+ 53. Kb1 Re2 54. Qd1 Rg2 55. Qf3 Rd2 56. Qf7# 1-0

[Event "Sao Paulo U16 3rd"]
[Site "Sao Paulo"]
[Date "2018.06.09"]
[Round "3.9"]
[White "Tsuchie, Davi Pinheiro"]
[Black "Laguna, Oscar Alexander San"]
[Result "1-0"]
[ECO "C66"]
[WhiteElo "1732"]
[PlyCount "143"]
[EventDate "2018.06.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nc3 d6 5. 0-0 g6 6. d4 Bd7 7. Re1 Bg7 8. dxe5 dxe5 9. Bxc6 Bxc6 10. Qxd8+ Rxd8 11. Nxe5 0-0 12. Nf3 Rd7 13. Bg5 Re7 14. Nd2 Rfe8 15. f3 Re6 16. Re2 Nd7 17. Bf4 Be5 18. Bxe5 Rxe5 19. Nc4 R5e7 20. Rd1 Nb6 21. Nxb6 axb6 22. Nd5 Bxd5 23. Rxd5 Ra8 24. a3 c6 25. Rd4 Rae8 26. Rb4 b5 27. Rd2 Kg7 28. Rbd4 g5 29. Rd7 f6 30. g3 Kf8 31. f4 Rxd7 32. Rxd7 Re7 33. Rd8+ Kf7 34. fxg5 fxg5 35. Rd4 Kf6 36. Kf2 c5 37. Rd5 b6 38. Rd6+ Re6 39. Rxe6+ Kxe6 40. Kf3 h5 41. h3 Ke5 42. g4 h4 43. c3 Kd6 44. b3 Kc6 45. c4 bxc4 46. bxc4 Kb7 47. e5 Kc6 48. Ke4 Kd7 49. Kd5 Kc7 50. e6 Kd8 51. Kd6 Ke8 52. Kc7 Ke7 53. Kxb6 Kxe6 54. Kxc5 Kd7 55. a4 Kc7 56. a5 Kb7 57. Kd6 Ka6 58. c5 Kb7 59. Kd7 Ka6 60. c6 Kxa5 61. c7 Kb6 62. c8Q Kb5 63. Qc7 Ka6 64. Qb8 Ka5 65. Qb7 Ka4 66. Qb6 Ka3 67. Qb5 Ka2 68. Kc6 Ka3 69. Kc5 Ka2 70. Kc4 Ka1 71. Kc3 Ka2 72. Qb2# 1-0

