| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Karpov vs K H Maeder |
 | 1-0 | 31 |
1967 |
02, Groningen Ech-jr fin | B25 Sicilian, Closed |
| 2. K H Maeder vs J Moles |
| 0-1 | 34 |
1967 |
EU-ch U18 sf 6768 | C52 Evans Gambit |
| 3. J Sloth vs K H Maeder |
| 1-0 | 40 |
1969 |
WchT U26 qual-B | A15 English |
| 4. K H Maeder vs E Scholl |
| 0-1 | 33 |
1969 |
Amsterdam (Netherlands) | C45 Scotch Game |
| 5. L Day vs K H Maeder |
| 1-0 | 27 |
1970 |
Wijk aan Zee | B23 Sicilian, Closed |
| 6. Estrin vs K H Maeder |
| 1-0 | 58 |
1978 |
corr-10 WCH | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 7. K H Maeder vs J Boey |
| 0-1 | 47 |
1978 |
corr-10 WCH | C63 Ruy Lopez, Schliemann Defense |
| 8. K H Maeder vs K B Richardson |
| 0-1 | 24 |
1978 |
corr-10 WCH | B09 Pirc, Austrian Attack |
| 9. K H Maeder vs J S Morgado |
| 0-1 | 43 |
1978 |
corr-10 WCH | C43 Petrov, Modern Attack |
| 10. Wojtkiewicz vs K H Maeder |
| 1-0 | 34 |
1990 |
Biel | E63 King's Indian, Fianchetto, Panno Variation |
| 11. K H Maeder vs Adorjan |
| 0-1 | 21 |
1990 |
Biel (Switzerland) | B83 Sicilian |
| 12. F Baumbach vs K H Maeder |
| 1-0 | 52 |
1991 |
corr X Olympiad Final | E97 King's Indian |
