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| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. G Pfeiffer vs O Benkner |
| 1-0 | 26 |
1952 |
Helsinki ol (Men) | C90 Ruy Lopez, Closed |
| 2. G Pfeiffer vs Ojanen |
| 0-1 | 66 |
1952 |
Helsinki ol (Men) | C90 Ruy Lopez, Closed |
| 3. G Pfeiffer vs Gligoric |
| 0-1 | 38 |
1954 |
Amsterdam ol (Men) fin-A | C84 Ruy Lopez, Closed |
| 4. G Pfeiffer vs L Sanchez |
| ½-½ | 43 |
1954 |
Amsterdam ol (Men) | C84 Ruy Lopez, Closed |
| 5. G Pfeiffer vs Tringov |
| 1-0 | 44 |
1956 |
Moscow ol (Men) fin-A | C84 Ruy Lopez, Closed |
| 6. G Pfeiffer vs Sliwa |
| ½-½ | 16 |
1957 |
Zonal tournament, Sofia | C84 Ruy Lopez, Closed |
| 7. G Pfeiffer vs O Neikirch |
| 1-0 | 57 |
1957 |
Zonal tournament, Sofia | C84 Ruy Lopez, Closed |
| 8. G Pfeiffer vs Lokvenc |
| ½-½ | 89 |
1958 |
13th olm final A | C84 Ruy Lopez, Closed |
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Secrets of Opening Surprises
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