| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. K Rahn vs G Pfeiffer |
| ½-½ | 48 |
1941 |
GER-ch | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 2. G Pfeiffer vs Lokvenc |
| ½-½ | 33 |
1941 |
GER-ch | C66 Ruy Lopez |
| 3. K Junge vs G Pfeiffer |
| ½-½ | 75 |
1941 |
GER-ch | A22 English |
| 4. R Palme vs G Pfeiffer |
| ½-½ | 26 |
1941 |
GER-ch | E80 King's Indian, Samisch Variation |
| 5. G Pfeiffer vs Kieninger |
| ½-½ | 14 |
1941 |
GER-ch | C71 Ruy Lopez |
| 6. G Pfeiffer vs W Ernst |
| ½-½ | 45 |
1941 |
GER-ch | D27 Queen's Gambit Accepted, Classical |
| 7. G Pfeiffer vs H Mueller |
| ½-½ | 88 |
1941 |
GER-ch | B72 Sicilian, Dragon |
| 8. Saemisch vs G Pfeiffer |
 | ½-½ | 40 |
1949 |
Bad Pyrmont ch-BRD | D63 Queen's Gambit Declined, Orthodox Defense |
| 9. Rellstab vs G Pfeiffer |
| ½-½ | 30 |
1950 |
Bled it | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 10. G Pfeiffer vs Ivkov |
| ½-½ | 46 |
1950 |
Bled | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 11. G Pfeiffer vs Cortlever |
| ½-½ | 27 |
1950 |
Dubrovnik olm | C77 Ruy Lopez |
| 12. G Pfeiffer vs B Milic |
| ½-½ | 73 |
1950 |
Bled it | C77 Ruy Lopez |
| 13. G Pfeiffer vs H Mueller |
| ½-½ | 22 |
1950 |
Dubrovnik olm | A46 Queen's Pawn Game |
| 14. B Kostic vs G Pfeiffer |
| ½-½ | 63 |
1950 |
Bled it | B12 Caro-Kann Defense |
| 15. Letelier vs G Pfeiffer |
| ½-½ | 61 |
1950 |
Dubrovnik olm | B14 Caro-Kann, Panov-Botvinnik Attack |
| 16. G Pfeiffer vs P Trifunovic |
| ½-½ | 31 |
1950 |
Dubrovnik olm | B07 Pirc |
| 17. G Pfeiffer vs Tartakower |
| ½-½ | 34 |
1950 |
Bled it | A46 Queen's Pawn Game |
| 18. A Dunkelblum vs G Pfeiffer |
| ½-½ | 16 |
1950 |
Dubrovnik olm | E01 Catalan, Closed |
| 19. Stoltz vs G Pfeiffer |
| ½-½ | 18 |
1950 |
Bled it | B12 Caro-Kann Defense |
| 20. O'Kelly vs G Pfeiffer |
| ½-½ | 46 |
1950 |
Bled (Slovenia) | B18 Caro-Kann, Classical |
| 21. M Kupferstich vs G Pfeiffer |
| ½-½ | 40 |
1950 |
Dubrovnik olm | D01 Richter-Veresov Attack |
| 22. G Pfeiffer vs Pachman |
| ½-½ | 89 |
1952 |
Helsinki ol (Men) | C65 Ruy Lopez, Berlin Defense |
| 23. G Pfeiffer vs E R Lundin |
| ½-½ | 81 |
1952 |
Helsinki ol (Men) | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 24. G Kluger vs G Pfeiffer |
| ½-½ | 40 |
1954 |
Amsterdam ol (Men) | D15 Queen's Gambit Declined Slav |
| 25. G Pfeiffer vs O Zimmermann |
| ½-½ | 17 |
1954 |
Amsterdam ol (Men) | B01 Scandinavian |