| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Feller vs M Littleton |
| ½-½ | 16 | 1969 | Praia da Rocha Zonal | C44 King's Pawn Game |
| 27. J Feller vs Filip |
| 0-1 | 28 | 1969 | Praia da Rocha Zonal | B06 Robatsch |
| 28. J Feller vs H Schaufelberger |
| ½-½ | 9 | 1969 | Praia da Rocha Zonal | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 29. Gligoric vs J Feller |
| 1-0 | 24 | 1969 | Praia da Rocha Zonal | D37 Queen's Gambit Declined |
| 30. H Schumacher vs J Feller |
| ½-½ | 31 | 1969 | Praia da Rocha Zonal | D32 Queen's Gambit Declined, Tarrasch |
| 31. W Hartston vs J Feller |
| 1-0 | 45 | 1969 | Praia da Rocha Zonal | A07 King's Indian Attack |
| 32. R Saborido vs J Feller |
| 1-0 | 50 | 1969 | Praia da Rocha Zonal | A43 Old Benoni |
| 33. J Feller vs S Mariotti |
| 0-1 | 54 | 1969 | Praia da Rocha Zonal | B22 Sicilian, Alapin |
| 34. J Feller vs F Visier Segovia |
| ½-½ | 36 | 1969 | Praia da Rocha Zonal | B22 Sicilian, Alapin |
| 35. J Cordovil vs J Feller |
| 0-1 | 33 | 1969 | Praia da Rocha Zonal | B06 Robatsch |
| 36. J Feller vs Keene |
 | 0-1 | 40 | 1970 | Siegen Olympiad qual-2 | B06 Robatsch |
| 37. O Ulvestad vs J Feller |
| 1-0 | 34 | 1970 | Siegen Olympiad qual-2 | E87 King's Indian, Samisch, Orthodox |
| 38. Matulovic vs J Feller |
| 1-0 | 14 | 1970 | Siegen Olympiad qual-2 | C78 Ruy Lopez |
| 39. Myagmarsuren vs J Feller |
| 1-0 | 37 | 1970 | Siegen Olympiad qual-2 | A07 King's Indian Attack |
| 40. J Feller vs S Sursock |
| ½-½ | 15 | 1970 | Siegen Olympiad Final-D | B12 Caro-Kann Defense |
| 41. L A Tan vs J Feller |
| ½-½ | 56 | 1970 | Siegen Olympiad Final-D | B29 Sicilian, Nimzovich-Rubinstein |
| 42. J Feller vs J Cordovil |
| 0-1 | 25 | 1970 | Siegen Olympiad Final-D | B04 Alekhine's Defense, Modern |
| 43. J Feller vs U Jahr |
| 0-1 | 40 | 1973 | Bad Mondorf | C01 French, Exchange |
| 44. I Engert vs J Feller |
| 0-1 | 40 | 1973 | Bad Mondorf | B25 Sicilian, Closed |
| 45. J Feller vs N Stull |
| 0-1 | 80 | 1973 | Bad Mondorf | B53 Sicilian |
| 46. H Akvist vs J Feller |
| ½-½ | 56 | 1973 | Bad Mondorf | B29 Sicilian, Nimzovich-Rubinstein |
| 47. J Feller vs D Knol |
| ½-½ | 27 | 1973 | Bad Mondorf | B22 Sicilian, Alapin |
| 48. J Feller vs J Eising |
| 0-1 | 75 | 1973 | Bad Mondorf | B84 Sicilian, Scheveningen |
| 49. R Teschner vs J Feller |
| ½-½ | 29 | 1973 | Bad Mondorf | B29 Sicilian, Nimzovich-Rubinstein |
| 50. J Feller vs W Schifferdecker |
| 0-1 | 41 | 1973 | Bad Mondorf | A07 King's Indian Attack |
Kibitzing
