[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.12"]
[Round "5"]
[White "Groeneman, Sidney"]
[Black "Darbes, Alex"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "106"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 e6 2. e4 Ne7 3. c4 Ng6 4. Nc3 Be7 5. Nf3 0-0 6. Bd3 Nc6 7. Be3 b6 8. Qc2 Nb4 9. Qd2 Nxd3+ 10. Qxd3 f5 11. exf5 Rxf5 12. g4 Rxf3 13. Qe4 Rxe3+ 14. fxe3 Rb8 15. Qd3 Bh4+ 16. Kd2 Qg5 17. h3 Bb7 18. Ne4 Qa5+ 19. Kc2 d5 20. cxd5 Qxd5 21. Nd2 c5 22. e4 Qxd4 23. Qb3 Bxe4+ 24. Nxe4 Qxe4+ 25. Qd3 Qxd3+ 26. Kxd3 Rd8+ 27. Kc2 e5 28. Rhf1 Nf4 29. Rf3 Bf6 30. Re1 g5 31. Rd1 Rd4 32. Ra3 a5 33. Rb3 Nd5 34. Rxd4 exd4 35. Kd3 Kf7 36. Kc4 Ke6 37. Rf3 Nf4 38. Rb3 Bd8 39. Rf3 Bc7 40. a4 Ke5 41. Rg3 Ke6 42. Rf3 Be5 43. Rb3 Nd5 44. Rf3 Bf4 45. Rf2 Ne3+ 46. Kd3 Kd5 47. b3 Kc6 48. Rb2 b5 49. Rb1 Nd5 50. Re1 Nb4+ 51. Ke2 bxa4 52. bxa4 c4 53. Kd1 c3 0-1

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.11"]
[Round "2"]
[White "Edwards, Bert"]
[Black "Groeneman, Sidney"]
[Result "1-0"]
[ECO "C07"]
[PlyCount "75"]
[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 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 Nf6 6. Bc4 Qd8 7. Nb3 Nbd7 8. Qe2 Be7 9. 0-0 0-0 10. Rd1 Qc7 11. Ne5 cxd4 12. Nxd7 Bxd7 13. Rxd4 e5 14. Rh4 Rfe8 15. Bd3 Rad8 16. Nd2 Bc6 17. Rh3 g6 18. b3 Bf8 19. Bb2 Bg7 20. f3 Nh5 21. g3 f5 22. Rd1 Nf6 23. Rh4 a6 24. a4 b5 25. axb5 axb5 26. c4 bxc4 27. Bxc4+ Bd5 28. Re1 Bxc4 29. Rxc4 Qd6 30. Rc2 Nd5 31. Nc4 Qb8 32. Nd2 Rd7 33. Qc4 Kh8 34. Nf1 Qd6 35. Rce2 Rde7 36. Kg2 Rc7 37. Qa4 Rce7 38. Ba3 1-0

[Event "Cincinnati  op"]
[Site "Cincinnati"]
[Date "1964.07.11"]
[Round "3"]
[White "Groeneman, Sidney"]
[Black "Phythyon, John R"]
[Result "0-1"]
[ECO "E81"]
[PlyCount "58"]
[EventDate "1964.07.11"]
[EventCountry "USA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 g6 2. c4 Nf6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Nge2 c5 7. d5 Na6 8. Be3 Bd7 9. Ng3 Rb8 10. Qd2 Nc7 11. a4 b6 12. Bd3 a6 13. b3 b5 14. Rb1 bxa4 15. bxa4 Rb4 16. a5 Na8 17. Na2 Ra4 18. Nc3 Rxa5 19. Qc2 Qc7 20. Bd2 Ra3 21. Bc1 Ra5 22. Bd2 Ne8 23. Qc1 Qd8 24. Nce2 Ra2 25. f4 e6 26. e5 dxe5 27. Nc3 Ra5 28. Nce2 exf4 29. Bxa5 Qxa5+ 0-1

