Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. F Popp vs O Nadenau |
| 1-0 | 46 | 1969 | corr | A02 Bird's Opening |
2. E Mednis vs O Nadenau |
| 1-0 | 22 | 1986 | Lugano Open | A15 English |
3. G Wagner vs O Nadenau |
| 0-1 | 32 | 1988 | Badenweiler Open | A00 Uncommon Opening |
4. O Nadenau vs I Radulov |
| 0-1 | 59 | 1988 | Badenweiler Open | A10 English |
5. Smejkal vs O Nadenau |
| 1-0 | 26 | 1989 | Bad Mergentheim op | A42 Modern Defense, Averbakh System |
6. V Heuer vs O Nadenau |
| ½-½ | 29 | 1991 | World Senior Championship | B14 Caro-Kann, Panov-Botvinnik Attack |
7. O Nadenau vs U Jahr |
| 0-1 | 41 | 1991 | World Senior Championship | A10 English |
8. O Nadenau vs F Winiwarter |
| 0-1 | 35 | 1991 | World Senior Championship | E85 King's Indian, Samisch, Orthodox Variation |
9. W Steglich vs O Nadenau |
| ½-½ | 28 | 1991 | World Senior Championship | B17 Caro-Kann, Steinitz Variation |
10. O Nadenau vs R Palme |
| ½-½ | 50 | 1991 | World Senior Championship | A18 English, Mikenas-Carls |
11. N Juergens vs O Nadenau |
| ½-½ | 25 | 1992 | World Senior Championship | D55 Queen's Gambit Declined |
12. O Nadenau vs G Ahlberg |
| ½-½ | 18 | 1992 | World Senior Championship | D16 Queen's Gambit Declined Slav |
13. O Sarapu vs O Nadenau |
| 1-0 | 78 | 1992 | World Senior Championship | E54 Nimzo-Indian, 4.e3, Gligoric System |
14. O Nadenau vs E Hensinger |
| 1-0 | 48 | 1992 | World Senior Championship | D45 Queen's Gambit Declined Semi-Slav |
15. K Mertins vs O Nadenau |
| ½-½ | 30 | 1992 | World Senior Championship | E31 Nimzo-Indian, Leningrad, Main line |
16. O Nadenau vs W Fluegel |
| 1-0 | 60 | 1992 | World Senior Championship | A16 English |
17. S Glende vs O Nadenau |
| 0-1 | 43 | 1992 | World Senior Championship | D01 Richter-Veresov Attack |
18. O Nadenau vs K Fels |
| 1-0 | 70 | 1992 | World Senior Championship | A17 English |
19. H Bender vs O Nadenau |
| ½-½ | 33 | 1992 | World Senior Championship | A04 Reti Opening |
20. O Nadenau vs L Hanke |
| ½-½ | 10 | 1992 | World Senior Championship | A16 English |
21. W Wolf vs O Nadenau |
| ½-½ | 41 | 1992 | World Senior Championship | E61 King's Indian |
22. H Speck vs O Nadenau |
| ½-½ | 11 | 1993 | Seefeld op | B17 Caro-Kann, Steinitz Variation |
23. O Nadenau vs F Loechner |
| ½-½ | 30 | 1993 | Wch Seniors 03rd | A22 English |
24. H Dunkel vs O Nadenau |
| ½-½ | 17 | 1993 | Wch Seniors 03rd | E74 King's Indian, Averbakh, 6...c5 |
25. O Nadenau vs Vasiukov |
| 0-1 | 28 | 1996 | 6th World Senior Championship | A85 Dutch, with c4 & Nc3 |