[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.12"]
[Round "4"]
[White "Couperus, Joe"]
[Black "Riesenbeck, Jack"]
[Result "1/2-1/2"]
[ECO "B13"]
[PlyCount "104"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. d4 Nc6 5. Bb5 Bg4 6. h3 Bh5 7. 0-0 e6 8. Qd3 Nf6 9. Ne5 Rc8 10. a3 Be7 11. Nd2 0-0 12. Nxc6 bxc6 13. Ba6 Rb8 14. b4 Qb6 15. Nb3 Bg6 16. Qe2 Ne4 17. Bb2 Rfd8 18. Bd3 Bd6 19. Nd2 Nxd2 20. Qxd2 Bxd3 21. Qxd3 Qb5 22. Rfd1 Qxd3 23. Rxd3 a5 24. c3 e5 25. dxe5 Bxe5 26. Re1 Bf6 27. Rde3 g6 28. Ba1 a4 29. Rf3 Kg7 30. Kf1 Re8 31. Rfe3 Kf8 32. Rxe8+ Rxe8 33. Rxe8+ Kxe8 34. Ke2 Kd7 35. Kd3 Kd6 36. Bb2 c5 37. Bc1 c4+ 38. Kc2 Bh4 39. Be3 Bf6 40. f4 Bg7 41. g4 f5 42. Bc5+ Kc6 43. Be3 h5 44. g5 Kb5 45. Kd2 Kc6 46. Ba7 Kb7 47. Bc5 Kc6 48. Be7 Kb5 49. Bf6 Bf8 50. Ke3 Bd6 51. Be5 Bf8 52. Kd4 Kc6 1/2-1/2

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.12"]
[Round "5"]
[White "Mercer, Ted"]
[Black "Couperus, Joe"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "37"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e5 5. Nf3 Nc6 6. Bc4 Be7 7. Qd5 d6 8. Qxf7+ Kd7 9. Nb5 Qe8 10. Qxe8+ Kxe8 11. Nc7+ Kd8 12. Nxa8 Nf6 13. Ng5 Rf8 14. Be3 h6 15. Ne6+ Bxe6 16. Bxe6 Nd7 17. Rc1 Nf6 18. b4 Nxe4 19. b5 1-0

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.11"]
[Round "1"]
[White "Brand, Lester"]
[Black "Couperus, Joe"]
[Result "1-0"]
[ECO "B53"]
[PlyCount "95"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e5 9. Qd3 Be7 10. 0-0 0-0 11. Rad1 Ne8 12. Bxe7 Qxe7 13. Nd5 Bxd5 14. Qxd5 Rd8 15. Rfe1 Nf6 16. Qa5 b6 17. Qb4 Rd7 18. Re3 Rc8 19. c3 Qe6 20. b3 d5 21. Qa4 Nxe4 22. Rxe4 dxe4 23. Qxd7 Qxd7 24. Rxd7 exf3 25. gxf3 f6 26. c4 a5 27. Kf1 h5 28. Ke2 Kh7 29. Ke3 Kh6 30. Ke4 g6 31. Rd6 Kg5 32. Rxb6 Rd8 33. c5 Rd2 34. c6 Kh4 35. c7 Rc2 36. Rxf6 Rxc7 37. Kxe5 Rc2 38. Rxg6 Rxa2 39. f4 Rb2 40. f5 Rxb3 41. f6 Rb5+ 42. Ke6 Rb6+ 43. Ke7 Rb7+ 44. Ke8 Rb8+ 45. Ke7 Rb7+ 46. Kf8 Rb8+ 47. Kg7 a4 48. f7 1-0

