[Event "Henderson Trusts op-A 43rd"]
[Site "Henderson"]
[Date "2021.06.07"]
[Round "5"]
[White "Koestanto, Erwin"]
[Black "Mao, Daqi"]
[Result "1-0"]
[ECO "E98"]
[WhiteElo "1828"]
[BlackElo "1837"]
[PlyCount "123"]
[EventDate "2021.06.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NZL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Ne8 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. c5 h5 14. cxd6 cxd6 15. a4 Nf6 16. Nb5 a6 17. Na3 Ng6 18. Nc4 Nh8 19. Qb3 Nf7 20. Nb6 Rb8 21. Rc1 Nh6 22. Nd3 Bd7 23. Qb4 Be8 24. Nc4 Nf7 25. Bb6 Qe7 26. Na5 Bd7 27. Rc7 Ne8 28. Rc3 g4 29. Ba7 Rc8 30. Qxb7 Nd8 31. Qb4 g3 32. Kh1 Kh8 33. Rfc1 Rxc3 34. Rxc3 Rg8 35. Bf1 gxh2 36. Bf2 Bf6 37. Nc6 Nxc6 38. dxc6 Bc8 39. c7 Bh4 40. Qb6 Bg3 41. Bxg3 Rxg3 42. Nb4 Rg8 43. Nd5 Qh4 44. Rc2 Qg5 45. Qf2 h4 46. Kxh2 Ng7 47. Nb6 Ne6 48. Nxc8 Rxc8 49. Bxa6 Rxc7 50. Rxc7 Nxc7 51. Bc8 Qd8 52. Bg4 Kg7 53. Qa7 Kf6 54. b4 h3 55. Qf2 Qh8 56. Bxh3 Ne6 57. a5 Kg5 58. a6 Qa8 59. b5 Qb8 60. b6 Qa8 61. b7 Qb8 62. Qb6 1-0

[Event "Henderson Trusts op-A 43rd"]
[Site "Henderson"]
[Date "2021.06.07"]
[Round "6"]
[White "Lim, Benjamin U"]
[Black "Koestanto, Erwin"]
[Result "0-1"]
[ECO "B03"]
[WhiteElo "1853"]
[BlackElo "1828"]
[PlyCount "174"]
[EventDate "2021.06.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NZL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Bd3 Nc6 7. Be3 g6 8. Nc3 Bg7 9. Nge2 0-0 10. a3 e5 11. d5 Ne7 12. Ng3 f5 13. f4 Nd7 14. Qd2 b6 15. 0-0 Ba6 16. b3 Rc8 17. Nge2 Kh8 18. Bc2 Ng8 19. Rad1 Ngf6 20. fxe5 dxe5 21. Bg5 Qe8 22. Bh6 Qf7 23. Bxg7+ Qxg7 24. Rfe1 Qe7 25. Kh1 Ng4 26. Nf4 Qh4 27. g3 Qe7 28. h3 Ngf6 29. Ne6 Rg8 30. Kh2 Qd6 31. Ng5 Rg7 32. Ne2 Re7 33. Qb4 Nc5 34. Qd2 h6 35. Nf3 Kg7 36. Nc3 Rce8 37. b4 Ncd7 38. Nb5 Bxb5 39. cxb5 Nh5 40. Qc3 Nb8 41. Bb3 Kh7 42. Nd2 Rc7 43. Nc4 Qf6 44. d6 Rg7 45. Qf3 e4 46. Qf2 Nd7 47. g4 fxg4 48. Qxf6 Nhxf6 49. hxg4 Nxg4+ 50. Kg3 Ngf6 51. Rd4 Rf7 52. Bd1 Ne5 53. Nxe5 Rxe5 54. d7 Rxd7 55. Rxd7+ Nxd7 56. Bb3 Nf6 57. Rf1 Kg7 58. Rc1 Re7 59. Kf4 e3 60. Re1 g5+ 61. Kf3 h5 62. Rxe3 Rxe3+ 63. Kxe3 Kg6 64. Bc2+ Kf7 65. Bf5 Ke7 66. a4 Kd6 67. Bd3 Ke5 68. a5 Nd5+ 69. Kf3 Nxb4 70. Bg6 h4 71. axb6 axb6 72. Kg4 Kf6 73. Be4 Na2 74. Bd3 Nc3 75. Kf3 Ke5 76. Kg4 Ne4 77. Bf1 Kf6 78. Bc4 Nd6 79. Bf1 Nf7 80. Be2 Ne5+ 81. Kh3 Kf5 82. Bd1 Kf4 83. Be2 Nf3 84. Kg2 g4 85. Kf2 h3 86. Bxf3 gxf3 87. Kg1 Ke3 0-1

[Event "Henderson Trusts op-A 43rd"]
[Site "Henderson"]
[Date "2021.06.06"]
[Round "3"]
[White "Koestanto, Erwin"]
[Black "Tang, Hao"]
[Result "0-1"]
[ECO "A57"]
[WhiteElo "1828"]
[BlackElo "1787"]
[PlyCount "70"]
[EventDate "2021.06.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NZL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. Qc2 bxc4 5. e4 d6 6. Bxc4 g6 7. Bd2 Bg7 8. Bc3 0-0 9. Nf3 Ba6 10. Nbd2 Bxc4 11. Nxc4 Nbd7 12. 0-0 Nb6 13. b3 Qc7 14. Rad1 Rfb8 15. Nfd2 Nxc4 16. Nxc4 a5 17. a4 Nd7 18. Bxg7 Kxg7 19. f4 Rb4 20. Rf3 Nb6 21. Na3 c4 22. Rc1 Qc5+ 23. Kh1 cxb3 24. Qb1 Qd4 25. Rxb3 Rxb3 26. Qxb3 Nxa4 27. Re1 Nc5 28. Qf3 Rb8 29. e5 Rb3 30. Nc2 Qd2 31. Qd1 Qxd1 32. Rxd1 Nd3 33. exd6 exd6 34. Kg1 Nxf4 35. Rd2 Rd3 0-1

[Event "Henderson Trusts op-A 43rd"]
[Site "Henderson"]
[Date "2021.06.06"]
[Round "4"]
[White "Wright, Caleb"]
[Black "Koestanto, Erwin"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "1861"]
[BlackElo "1828"]
[PlyCount "63"]
[EventDate "2021.06.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NZL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. b3 Ne4 7. Bb2 c5 8. c3 Nc6 9. e3 Bg4 10. h3 Bxf3 11. Bxf3 e5 12. Bxe4 dxe4 13. dxc5 Qc8 14. Kg2 Rd8 15. Qe2 Rd3 16. Na3 Qd7 17. Nc4 Qd5 18. Ba3 Rd8 19. Nd6 b6 20. c4 Qe6 21. Rad1 bxc5 22. Nxe4 Qf5 23. Nxc5 Rxd1 24. Rxd1 e4 25. Rxd8+ Nxd8 26. Qg4 Bf8 27. Qxf5 gxf5 28. Kf1 Nc6 29. Ke2 Ne5 30. Bb2 Nf3 31. Nd7 Be7 32. Nf6+ 1-0

[Event "Henderson Trusts op-A 43rd"]
[Site "Henderson"]
[Date "2021.06.05"]
[Round "1"]
[White "Duneas, John"]
[Black "Koestanto, Erwin"]
[Result "1-0"]
[ECO "D70"]
[WhiteElo "2135"]
[BlackElo "1828"]
[PlyCount "101"]
[EventDate "2021.06.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NZL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 g6 4. cxd5 Nxd5 5. e4 Nb6 6. Nc3 Bg7 7. Be3 0-0 8. h3 Nc6 9. Be2 e5 10. d5 Ne7 11. Qb3 Bd7 12. Bc5 Nec8 13. Bxf8 Qxf8 14. 0-0 Nd6 15. Rfd1 h6 16. a4 a5 17. Bb5 Kh7 18. Bxd7 Nxd7 19. Nd2 f5 20. Qc2 Nc5 21. f3 b6 22. Nb5 Rc8 23. Nxd6 cxd6 24. Rac1 h5 25. exf5 gxf5 26. Qc4 Bh6 27. Rc3 Qg7 28. Nf1 Rg8 29. Rc2 Bf4 30. b4 axb4 31. Qxb4 e4 32. fxe4 Nxe4 33. Qxb6 Kh6 34. Qd4 Qg5 35. Qd3 Qh4 36. Rb1 Ng5 37. Kh1 Ne4 38. Qf3 Rg5 39. Re2 Ng3+ 40. Nxg3 Rxg3 41. Qf2 Kg5 42. Rf1 Rxh3+ 43. gxh3 Qxh3+ 44. Kg1 Qg4+ 45. Qg2 Bg3 46. Qxg3 Qxg3+ 47. Rg2 f4 48. Rxg3+ fxg3 49. Kg2 Kg4 50. Rf8 h4 51. Rg8+ 1-0

[Event "Henderson Trusts op-A 43rd"]
[Site "Henderson"]
[Date "2021.06.05"]
[Round "2"]
[White "Koestanto, Erwin"]
[Black "Bennett, Hilton Petrie"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "1828"]
[BlackElo "1932"]
[PlyCount "103"]
[EventDate "2021.06.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NZL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Na6 7. 0-0 e5 8. dxe5 dxe5 9. Qxd8 Rxd8 10. Be3 Re8 11. Nd2 c6 12. Rfd1 Ng4 13. Bxg4 Bxg4 14. f3 Be6 15. a3 Nc7 16. b4 Red8 17. Kf2 f5 18. Ke2 Bf7 19. Na4 b6 20. Nc3 Ne6 21. Rac1 Nd4+ 22. Ke1 f4 23. Bf2 g5 24. a4 Bf8 25. b5 Ba3 26. Rb1 Nc2+ 27. Ke2 Bb4 28. Rbc1 Nd4+ 29. Ke1 Rac8 30. bxc6 Bxc3 31. Rxc3 Rxc6 32. Nb3 Rxc4 33. Rxc4 Bxc4 34. Nxd4 exd4 35. a5 b5 36. Kd2 a6 37. h4 h6 38. hxg5 hxg5 39. Rg1 Kf7 40. g3 fxg3 41. Rxg3 Kf6 42. Rg4 Be6 43. Rg1 Bc4 44. f4 Rd7 45. Rxg5 b4 46. Bh4 Kf7 47. Rc5 Bb5 48. f5 b3 49. e5 Rb7 50. e6+ Kg8 51. Rc8+ Kh7 52. Bf6 1-0

[Event "NZL-ch rapid op"]
[Site "Auckland"]
[Date "2019.01.24"]
[Round "9"]
[White "Goormachtigh, Laurens"]
[Black "Koestanto, Erwin"]
[Result "0-1"]
[ECO "B05"]
[WhiteElo "1675"]
[BlackElo "1754"]
[PlyCount "156"]
[EventDate "2019.01.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "NZL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. Nf3 Bg4 6. h3 Bh5 7. exd6 cxd6 8. Bd3 e6 9. 0-0 Be7 10. Nc3 0-0 11. Re1 d5 12. c5 Bxf3 13. Qxf3 Nc8 14. Bf4 Nc6 15. Be3 Bf6 16. Qg4 g6 17. Bh6 Bxd4 18. Bxf8 Qxf8 19. Rac1 Bg7 20. Re2 Ne5 21. Qg3 Nxd3 22. Qxd3 Qxc5 23. Rec2 Nd6 24. a3 Nc4 25. Ne4 Qb6 26. Nd2 Bh6 27. Nxc4 dxc4 28. Qxc4 Bxc1 29. Rxc1 Qxb2 30. a4 a6 31. Qc7 b5 32. Qc6 Rd8 33. axb5 axb5 34. Rc5 b4 35. Qb6 Qd4 36. Rb5 Qxb6 37. Rxb6 Rd4 38. Kf1 Kg7 39. Ke2 e5 40. Ke3 g5 41. g3 f6 42. f3 Kg6 43. Rb5 Rc4 44. Kd3 Rc3+ 45. Ke4 b3 46. Rb6 h5 47. g4 hxg4 48. hxg4 Kf7 49. Rb7+ Ke6 50. Rb6+ Ke7 51. Rb5 Rc4+ 52. Kd3 Rf4 53. Ke3 e4 54. fxe4 Rxg4 55. Kf3 Rh4 56. e5 f5 57. Kg2 Re4 58. Kf3 Ke6 59. Rxb3 Kxe5 60. Rb5+ Kf6 61. Rb6+ Re6 62. Rb5 Ra6 63. Rc5 Ra3+ 64. Kf2 g4 65. Kg2 Kg5 66. Rc8 Ra2+ 67. Kg1 f4 68. Kf1 Kh4 69. Rc3 g3 70. Rc8 Kh3 71. Rh8+ Kg4 72. Rb8 Ra1+ 73. Ke2 f3+ 74. Ke3 Re1+ 75. Kd3 Re5 76. Rb4+ Kh3 77. Rb8 f2 78. Rf8 Kg2 0-1

[Event "NZL-ch rapid op"]
[Site "Auckland"]
[Date "2019.01.24"]
[Round "7"]
[White "Koestanto, Erwin"]
[Black "Garbett, Paul Anthony"]
[Result "1/2-1/2"]
[ECO "E01"]
[WhiteElo "1754"]
[BlackElo "2215"]
[PlyCount "92"]
[EventDate "2019.01.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "NZL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Bd6 6. Qc2 c6 7. Bg2 Ne4 8. 0-0 0-0 9. Nc3 f5 10. Rab1 a5 11. cxd5 exd5 12. Bf4 Qe7 13. e3 Nd7 14. Ne1 Nxc3 15. bxc3 b5 16. Nd3 Ba6 17. Rfe1 g5 18. Bxd6 Qxd6 19. f3 h6 20. e4 f4 21. exd5 fxg3 22. Ne5 gxh2+ 23. Kh1 cxd5 24. f4 Rxf4 25. Nxd7 Qxd7 26. Qg6+ Kh8 27. Qxh6+ Qh7 28. Qxg5 Raf8 29. Qe5+ Qg7 30. Qxg7+ Kxg7 31. Re6 Bc8 32. Re5 b4 33. cxb4 axb4 34. Rxb4 Rf2 35. Rg5+ Kh6 36. Rg3 Rxa2 37. Rb6+ Kh7 38. Kxh2 Bf5 39. Rb7+ Kh8 40. Rbg7 Be4 41. R7g5 Rxg2+ 42. Rxg2 Bxg2 43. Kxg2 Rg8 44. Rxg8+ Kxg8 45. Kg3 Kg7 46. Kf4 Kf6 1/2-1/2

[Event "NZL-ch rapid op"]
[Site "Auckland"]
[Date "2019.01.24"]
[Round "8"]
[White "Koestanto, Erwin"]
[Black "Lovejoy, David W"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "1754"]
[BlackElo "1906"]
[PlyCount "84"]
[EventDate "2019.01.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "NZL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Be7 5. e3 h6 6. Bh4 b6 7. Nc3 0-0 8. Be2 Bb7 9. Rc1 Nbd7 10. 0-0 c5 11. cxd5 Nxd5 12. Bg3 N7f6 13. Qb3 Nxc3 14. bxc3 Ne4 15. Rfd1 Nxg3 16. hxg3 Qc7 17. Nd2 Rac8 18. Qb2 Bf6 19. Bf3 Rfd8 20. Bxb7 Qxb7 21. Qb1 Be7 22. Nf3 cxd4 23. cxd4 Ba3 24. Rxc8 Rxc8 25. Qb3 Qa6 26. d5 exd5 27. Qxd5 Bb2 28. Qf5 Bf6 29. g4 Rc5 30. Qd7 Qxa2 31. e4 Qe6 32. Qxa7 Qxe4 33. Qxb6 Rc6 34. Qb7 Re6 35. Qc8+ Kh7 36. Qf8 Kg6 37. Rd7 Re7 38. Rxe7 Qxe7 39. Qc8 Kh7 40. Qf5+ g6 41. Qf4 Kg7 42. g3 Qe6 1/2-1/2

[Event "NZL-ch rapid op"]
[Site "Auckland"]
[Date "2019.01.23"]
[Round "4"]
[White "Ker, Anthony F"]
[Black "Koestanto, Erwin"]
[Result "1/2-1/2"]
[ECO "B03"]
[WhiteElo "2301"]
[BlackElo "1754"]
[PlyCount "110"]
[EventDate "2019.01.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "NZL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nc3 Bf5 7. Nf3 e6 8. Bd3 Bg4 9. h3 Bh5 10. b3 Be7 11. 0-0 0-0 12. Bb2 d5 13. c5 Bxf3 14. Qxf3 Nc8 15. a3 Nc6 16. Ne2 Bf6 17. b4 a6 18. Rad1 g6 19. Bb1 Bg7 20. Rfe1 Qf6 21. Qd3 N8e7 22. f4 Qh4 23. Kh2 Nf5 24. g3 Qd8 25. g4 Nh6 26. Ng1 Qc7 27. Qg3 Rfe8 28. Nf3 f6 29. Re2 Re7 30. Rde1 Rae8 31. Ba2 Kh8 32. Bc3 Nf7 33. h4 Qd7 34. g5 f5 35. h5 Kg8 36. Kg2 Nfd8 37. Rh1 Qc7 38. Qh4 Kf7 39. Kg3 b6 40. Reh2 bxc5 41. bxc5 Nb7 42. hxg6+ hxg6 43. Qh7 Rd7 44. Rh6 Ne7 45. Ne5+ Kf8 46. Qxg7+ Kxg7 47. Rh7+ Kf8 48. Rf7+ Kg8 49. Rhh7 Nd8 50. Rhg7+ Kh8 51. Rh7+ Kg8 52. Rfg7+ Kf8 53. Ba5 Qb7 54. Bxd8 Rexd8 55. c6 Re8 1/2-1/2

[Event "NZL-ch rapid op"]
[Site "Auckland"]
[Date "2019.01.23"]
[Round "2"]
[White "Wohl, Aleksandar H"]
[Black "Koestanto, Erwin"]
[Result "1-0"]
[ECO "B03"]
[WhiteElo "2335"]
[BlackElo "1754"]
[PlyCount "65"]
[EventDate "2019.01.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "NZL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nc3 g6 7. Be3 Bg7 8. Rc1 0-0 9. b3 Nc6 10. d5 Ne5 11. Be2 Ned7 12. h4 Nf6 13. h5 e6 14. dxe6 Bxe6 15. hxg6 hxg6 16. Nf3 d5 17. c5 Nc8 18. Nd4 Re8 19. b4 a6 20. g4 Na7 21. g5 Ne4 22. Nxe4 dxe4 23. Nxe6 Rxe6 24. Bc4 Re8 25. Qg4 Nc6 26. Rd1 Qc8 27. Qh4 Qf5 28. Qh7+ Kf8 29. Rh4 Ne5 30. Rf4 Nxc4 31. Rxf5 Nxe3 32. Rxf7+ Kxf7 33. Rd7+ 1-0

