| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Letelier vs G Pfeiffer |
| ½-½ | 61 |
1950 |
Dubrovnik olm | B14 Caro-Kann, Panov-Botvinnik Attack |
| 27. G Pfeiffer vs A Matanovic |
| 1-0 | 59 |
1950 |
Bled it | B10 Caro-Kann |
| 28. Shainswit vs G Pfeiffer |
| 1-0 | 42 |
1950 |
Dubrovnik olm | E01 Catalan, Closed |
| 29. G Pfeiffer vs Najdorf |
| 0-1 | 40 |
1950 |
Bled | B20 Sicilian |
| 30. Pirc vs G Pfeiffer |
| 1-0 | 41 |
1950 |
Bled it | A07 King's Indian Attack |
| 31. G Pfeiffer vs P Trifunovic |
| ½-½ | 31 |
1950 |
Dubrovnik olm | B07 Pirc |
| 32. A Dunkelblum vs G Pfeiffer |
| ½-½ | 16 |
1950 |
Dubrovnik olm | E01 Catalan, Closed |
| 33. Rellstab vs G Pfeiffer |
| ½-½ | 30 |
1950 |
Bled it | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 34. G Pfeiffer vs H Muller |
| ½-½ | 22 |
1950 |
Dubrovnik olm | A46 Queen's Pawn Game |
| 35. G Pfeiffer vs Tartakower |
| ½-½ | 34 |
1950 |
Bled it | A46 Queen's Pawn Game |
| 36. Stoltz vs G Pfeiffer |
| ½-½ | 18 |
1950 |
Bled it | B12 Caro-Kann Defense |
| 37. M Kupferstich vs G Pfeiffer |
| ½-½ | 40 |
1950 |
Dubrovnik olm | D01 Richter-Veresov Attack |
| 38. G Pfeiffer vs B Milic |
| ½-½ | 73 |
1950 |
Bled it | C77 Ruy Lopez |
| 39. G Pfeiffer vs C Hugot |
| 1-0 | 54 |
1950 |
Dubrovnik olm | C14 French, Classical |
| 40. G Pfeiffer vs Vidmar |
| 1-0 | 37 |
1950 |
Bled | B05 Alekhine's Defense, Modern |
| 41. A Fuderer vs G Pfeiffer |
| 0-1 | 69 |
1950 |
Bled it | B01 Scandinavian |
| 42. G Pfeiffer vs Guimard |
| 1-0 | 73 |
1950 |
Dubrovnik olm | C14 French, Classical |
| 43. B Kostic vs G Pfeiffer |
| ½-½ | 63 |
1950 |
Bled it | B12 Caro-Kann Defense |
| 44. G Pfeiffer vs T Panagopoulos |
| 1-0 | 34 |
1950 |
Dubrovnik olm | C14 French, Classical |
| 45. G Pfeiffer vs Ivkov |
| ½-½ | 46 |
1950 |
Bled | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 46. Pilnik vs G Pfeiffer |
| 1-0 | 40 |
1950 |
Bled it | B17 Caro-Kann, Steinitz Variation |
| 47. G Pfeiffer vs Cortlever |
| ½-½ | 27 |
1950 |
Dubrovnik olm | C77 Ruy Lopez |
| 48. Schmid vs G Pfeiffer |
| 1-0 | 40 |
1951 |
GER-ch 14th | B10 Caro-Kann |
| 49. G Pfeiffer vs Gilg |
| 1-0 | 44 |
1951 |
GER Ch 14th | B50 Sicilian |
| 50. Pilnik vs G Pfeiffer |
| 1-0 | 41 |
1952 |
Helsinki ol (Men) | B21 Sicilian, 2.f4 and 2.d4 |