[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "3"]
[White "Koster, Robert"]
[Black "Collins, John William"]
[Result "1/2-1/2"]
[ECO "B43"]
[PlyCount "121"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. g3 Bb7 7. Bg2 Nf6 8. 0-0 b4 9. Na4 Nxe4 10. Qe2 d5 11. c4 bxc3 12. Bxe4 dxe4 13. Rd1 Nd7 14. Nxc3 Be7 15. Qg4 Nf6 16. Qxg7 Rg8 17. Qh6 Qa5 18. Be3 Rg6 19. Qh3 Rc8 20. Nce2 Qh5 21. Qxh5 Nxh5 22. Rac1 e5 23. Nf5 Bf8 24. a3 Rgc6 25. Rxc6 Rxc6 26. Rc1 Rxc1+ 27. Bxc1 Nf6 28. Nc3 Nd7 29. b4 Nb6 30. g4 Bc6 31. Kf1 Kd7 32. Ke2 Ke6 33. h3 h5 34. Ne3 hxg4 35. hxg4 Bh6 36. Bd2 Bf4 37. Kd1 Bg5 38. Kc2 Bh4 39. Be1 Na4 40. Nxa4 Bxa4+ 41. Kc3 Bb5 42. Kb3 Be2 43. a4 Bg5 44. Kc3 Kd6 45. Bd2 Bxe3 46. Bxe3 Bxg4 47. b5 axb5 48. axb5 f5 49. Kc4 Be2+ 50. Kb4 f4 51. Ba7 e3 52. fxe3 f3 53. e4 Bd3 54. Be3 Bxe4 55. Kc3 Ke6 56. Kd2 Kf5 57. Ke1 Bb7 58. Kf2 Ke4 59. Ba7 Kd3 60. Be3 Kc4 61. b6 1/2-1/2

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "9"]
[White "Koster, Robert"]
[Black "Jones, Kenneth R"]
[Result "1-0"]
[ECO "E81"]
[PlyCount "83"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. c4 d6 4. Nc3 Nd7 5. Be3 c5 6. Nge2 Ngf6 7. f3 0-0 8. Qd2 a6 9. g4 Qa5 10. Ng3 cxd4 11. Bxd4 Ne5 12. Be2 Be6 13. Nd5 Qxd2+ 14. Kxd2 Nxd5 15. cxd5 Bd7 16. Be3 b5 17. Rac1 Rac8 18. b3 f6 19. Rxc8 Rxc8 20. Rc1 Rxc1 21. Kxc1 e6 22. f4 Nf7 23. dxe6 Bxe6 24. Kc2 Bc8 25. a4 bxa4 26. bxa4 Kf8 27. Kb3 Nd8 28. Bc4 Ke7 29. h3 Bh6 30. Ne2 f5 31. exf5 gxf5 32. g5 Bg7 33. Bd4 Bxd4 34. Nxd4 Be6 35. Nxe6 Nxe6 36. Bxe6 Kxe6 37. Kc4 a5 38. h4 Ke7 39. Kd5 Kd7 40. h5 Ke7 41. h6 Kd7 42. g6 1-0

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "5"]
[White "Koster, Robert"]
[Black "Simms, Gary M"]
[Result "1/2-1/2"]
[ECO "B74"]
[PlyCount "38"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[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 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. Nb3 0-0 9. 0-0 Be6 10. f4 Na5 11. Re1 Nc4 12. Bxc4 Bxc4 13. Qf3 Qc8 14. Bd4 e5 15. fxe5 Ng4 16. exd6 Bxb3 17. Bxg7 Qc5+ 18. Kh1 Nf2+ 19. Kg1 Nh3+ 1/2-1/2

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "4"]
[White "Nash, Edmund"]
[Black "Koster, Robert"]
[Result "1-0"]
[ECO "C90"]
[PlyCount "49"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. Nbd2 0-0 12. Nf1 Bg4 13. d5 Rad8 14. h3 Bc8 15. b3 Ne8 16. Ne3 g6 17. g4 Ng7 18. Kh2 Kh8 19. Rg1 f5 20. gxf5 gxf5 21. exf5 Nxf5 22. Nxf5 Bxf5 23. Bh6 Bxc2 24. Qxc2 Rg8 25. Qf5 1-0

[Event "US Open-68"]
[Site "Atlanta"]
[Date "1967.??.??"]
[Round "10"]
[White "Wheeler, Bill"]
[Black "Koster, Robert"]
[Result "1/2-1/2"]
[ECO "C42"]
[PlyCount "94"]
[EventDate "1967.08.13"]
[EventType "swiss"]
[EventRounds "12"]
[EventCountry "USA"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Bg5 Qxe2+ 8. Bxe2 Be7 9. h3 Bd7 10. Nbd2 h6 11. Bf4 Nc6 12. 0-0-0 0-0-0 13. g4 g5 14. Bg3 Rhe8 15. d4 Bf8 16. Rde1 Re7 17. c3 Rde8 18. Bd3 d5 19. Rxe7 Rxe7 20. Ne5 Nxe5 21. dxe5 Ne4 22. Nxe4 dxe4 23. Bxe4 f6 24. Re1 fxe5 25. Bxe5 c6 26. Bg3 h5 27. f3 h4 28. Bf2 Re5 29. Kd2 Bc5 30. Bxc6 Bxc6 31. Rxe5 Bxf2 32. Rxg5 Kd7 33. c4 Bd4 34. Ke2 Bxb2 35. Rh5 Kd6 36. Rxh4 Ke5 37. g5 Kf5 38. Rg4 Kg6 39. f4 Bd7 40. Rg3 Bc1 41. Rd3 Bf5 42. Rd6+ Kg7 43. Rh6 Bb1 44. Rd6 Bxf4 45. Rd7+ Kg6 46. Rxb7 Bxa2 47. Rxa7 Bxc4+ 1/2-1/2

