| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J Neumann vs K Wockenfuss |
| 0-1 | 26 |
1973 |
Landesmeistersch. Schleswig Holst. | C63 Ruy Lopez, Schliemann Defense |
| 2. J Neumann vs Smejkal |
| 0-1 | 73 |
1978 |
Kiel | B43 Sicilian, Kan, 5.Nc3 |
| 3. J Neumann vs Parma |
 | 0-1 | 35 |
1978 |
Kiel (Germany) | B33 Sicilian |
| 4. W Schmidt vs J Neumann |
 | 1-0 | 20 |
1979 |
Kiel | E18 Queen's Indian, Old Main line, 7.Nc3 |
| 5. J Neumann vs A Soltau |
| ½-½ | 21 |
1981 |
Germany | B93 Sicilian, Najdorf, 6.f4 |
| 6. J Neumann vs Van Wely |
| 1-0 | 52 |
1988 |
Lyngby op | B80 Sicilian, Scheveningen |
| 7. T Hamarat vs J Neumann |
| 1-0 | 29 |
1995 |
olm12 fin B1 corr9598 | B66 Sicilian, Richter-Rauzer Attack, 7...a6 |
| 8. J Neumann vs G Mueller |
| ½-½ | 24 |
2002 |
ICCF - corr | B90 Sicilian, Najdorf |
| 9. A Linna vs J Neumann |
| ½-½ | 35 |
2002 |
ICCF - corr | A62 Benoni, Fianchetto Variation |
| 10. Rohde vs J Neumann |
| ½-½ | 30 |
2002 |
ICCF - corr | E46 Nimzo-Indian |
| 11. J Neumann vs S Korolev |
| 1-0 | 45 |
2002 |
ICCF - corr | B29 Sicilian, Nimzovich-Rubinstein |
| 12. M Lecroq vs J Neumann |
| ½-½ | 36 |
2002 |
ICCF - corr | B33 Sicilian |
| 13. J Neumann vs B Vukcevic |
| 1-0 | 47 |
2002 |
ICCF - corr | C60 Ruy Lopez |
| 14. J Neumann vs G Glatt |
| ½-½ | 29 |
2002 |
ICCF - corr | C95 Ruy Lopez, Closed, Breyer |
| 15. W Zugrav vs J Neumann |
| 1-0 | 33 |
2002 |
ICCF - corr | B33 Sicilian |
| 16. S Khlusevich vs J Neumann |
| 0-1 | 21 |
2002 |
ICCF - corr | B33 Sicilian |
| 17. J Neumann vs W Stern |
| 1-0 | 67 |
2002 |
ICCF - corr | B90 Sicilian, Najdorf |
| 18. J Neumann vs N Gallinnis |
| ½-½ | 48 |
2002 |
ICCF - corr | B80 Sicilian, Scheveningen |
| 19. L Danek vs J Neumann |
| 0-1 | 41 |
2002 |
ICCF - corr | B33 Sicilian |
| 20. I Bern vs J Neumann |
| ½-½ | 39 |
2002 |
ICCF - corr | E32 Nimzo-Indian, Classical |
| 21. J Neumann vs T Raupp |
| ½-½ | 14 |
2002 |
ICCF - corr | B42 Sicilian, Kan |
| 22. J Neumann vs A Eriksson |
| 1-0 | 39 |
2002 |
ICCF - corr | E46 Nimzo-Indian |
| 23. A Voyna vs J Neumann |
| ½-½ | 16 |
2002 |
ICCF - corr | E14 Queen's Indian |
| 24. J Neumann vs K Wiacek |
| ½-½ | 24 |
2006 |
ICCF Olympiad 15 Final | C17 French, Winawer, Advance |
| 25. J Neumann vs M Gerzina |
| ½-½ | 74 |
2006 |
ICCF Olympiad 15 Final | C42 Petrov Defense |