| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Kaplan vs N Dietrich |
| 1-0 | 24 | 1966 | Havana Olympiad Final-C | A00 Uncommon Opening |
| 27. F Campomanes vs J Kaplan |
| 1-0 | 58 | 1966 | Havana Olympiad Final-C | A16 English |
| 28. J Kaplan vs H B Rehouma |
| 1-0 | 29 | 1966 | Havana Olympiad Final-C | B76 Sicilian, Dragon, Yugoslav Attack |
| 29. I Ibrahimoglu vs J Kaplan |
| 1-0 | 62 | 1966 | Havana Olympiad Final-C | B32 Sicilian |
| 30. J Kaplan vs J F Olivera |
| 1-0 | 27 | 1966 | Havana Olympiad Final-C | A16 English |
| 31. J Kaplan vs Rossolimo |
  | 1-0 | 18 | 1967 | Puerto Rico | B16 Caro-Kann, Bronstein-Larsen Variation |
| 32. J Kaplan vs R Quintana |
| 1-0 | 22 | 1967 | Santo Dominico | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 33. J Kaplan vs L Day |
| ½-½ | 24 | 1967 | Wch U20 fin-A | B02 Alekhine's Defense |
| 34. J Kaplan vs Timman |
| 1-0 | 18 | 1967 | Wch U20 fin-A | C17 French, Winawer, Advance |
| 35. Huebner vs J Kaplan |
| 0-1 | 62 | 1967 | Wch U20 fin-A | A17 English |
| 36. T Weinberger vs J Kaplan |
| ½-½ | 60 | 1967 | Santa Monica Masters Invitational | A46 Queen's Pawn Game |
| 37. A Whiteley vs J Kaplan |
| ½-½ | 86 | 1967 | Hastings 1967/68 | A56 Benoni Defense |
| 38. J Kaplan vs Gheorghiu |
| 0-1 | 29 | 1967 | Hastings 1967/68 | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 39. P Ostojic vs J Kaplan |
| ½-½ | 25 | 1967 | Hastings 1967/68 | B32 Sicilian |
| 40. J Kaplan vs Suetin |
| ½-½ | 40 | 1967 | Hastings 1967/68 | B48 Sicilian, Taimanov Variation |
| 41. Stein vs J Kaplan |
| ½-½ | 27 | 1967 | Hastings 1967/68 | A39 English, Symmetrical, Main line with d4 |
| 42. Pachman vs J Kaplan |
| ½-½ | 43 | 1968 | Puerto Rico | A73 Benoni, Classical, 9.O-O |
| 43. M Basman vs J Kaplan |
| ½-½ | 43 | 1968 | Hastings 1967/68 | B43 Sicilian, Kan, 5.Nc3 |
| 44. J Kaplan vs Hort |
| ½-½ | 18 | 1968 | Hastings 1967/68 | B08 Pirc, Classical |
| 45. W Hartston vs J Kaplan |
| ½-½ | 43 | 1968 | Hastings 1967/68 | C82 Ruy Lopez, Open |
| 46. J Kaplan vs Keene |
| ½-½ | 24 | 1968 | Hastings 1967/68 | D78 Neo-Grunfeld, 6.O-O c6 |
| 47. J Kaplan vs S Tatai |
| 1-0 | 24 | 1968 | Costa del Sol | B93 Sicilian, Najdorf, 6.f4 |
| 48. A Pomar vs J Kaplan |
| ½-½ | 30 | 1968 | Costa del Sol | A31 English, Symmetrical, Benoni Formation |
| 49. D Marovic vs J Kaplan |
| 1-0 | 26 | 1968 | Costa del Sol | A56 Benoni Defense |
| 50. J Kaplan vs B Zuckerman |
| 0-1 | 46 | 1968 | Costa del Sol | B93 Sicilian, Najdorf, 6.f4 |
Kibitzing
