Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. W Bialas vs H Sonntag |
| ½-½ | 66 | 1981 | Bundesliga 1981/82 | E69 King's Indian, Fianchetto, Classical Main line |
2. U Jahr vs H Sonntag |
| ½-½ | 63 | 1981 | Bundesliga 1981/82 | C44 King's Pawn Game |
3. M Gerusel vs H Sonntag |
| ½-½ | 65 | 1981 | Bundesliga 1981/82 | D69 Queen's Gambit Declined, Orthodox Defense, Classical, 13.de |
4. H Sonntag vs J Dueball |
| 0-1 | 51 | 1982 | Bundesliga 1981/82 | E83 King's Indian, Samisch |
5. R Wittmann vs H Sonntag |
| 0-1 | 54 | 1982 | Bundesliga 1981/82 | C95 Ruy Lopez, Closed, Breyer |
6. H Sonntag vs A Fehrig |
| 1-0 | 39 | 1982 | Bundesliga 1981/82 | B45 Sicilian, Taimanov |
7. G Jacoby vs H Sonntag |
| ½-½ | 43 | 1982 | Bundesliga 1981/82 | D35 Queen's Gambit Declined |
8. K Klundt vs H Sonntag |
| 1-0 | 45 | 1982 | Bundesliga 1981/82 | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
9. H Sonntag vs V Ruehrig |
| 1-0 | 54 | 1982 | Bundesliga 1981/82 | E82 King's Indian, Samisch, double Fianchetto Variation |
10. H Sonntag vs T Raupp |
| ½-½ | 19 | 1982 | Bundesliga 1981/82 | B43 Sicilian, Kan, 5.Nc3 |
11. W Schmidt vs H Sonntag |
| ½-½ | 27 | 1982 | Bundesliga 1981/82 | A07 King's Indian Attack |
12. H Sonntag vs M Dornieden |
| 1-0 | 50 | 1982 | Bundesliga 1981/82 | A42 Modern Defense, Averbakh System |
13. H Sonntag vs H Bastian |
| ½-½ | 46 | 1983 | Bundesliga 8283 | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
14. M Autenrieth vs H Sonntag |
| 0-1 | 67 | 1984 | Bundesliga 1984/85 | C26 Vienna |
15. H Sonntag vs V Ruehrig |
| 0-1 | 41 | 1984 | Bundesliga 8485 | D34 Queen's Gambit Declined, Tarrasch |
16. G Hertneck vs H Sonntag |
| 1-0 | 42 | 1985 | Bundesliga 1985/86 | D69 Queen's Gambit Declined, Orthodox Defense, Classical, 13.de |
17. H Niedermaier vs H Sonntag |
| 0-1 | 51 | 1986 | Bundesliga 1986/87 | C30 King's Gambit Declined |
18. H Sonntag vs G Andruet |
| 0-1 | 37 | 1986 | Bundesliga 1986/87 | B17 Caro-Kann, Steinitz Variation |
19. H Sonntag vs G Tringov |
| 1-0 | 43 | 1986 | Berliner Sommer | A75 Benoni, Classical with ...a6 and 10...Bg4 |
20. H Sonntag vs J Lechtynsky |
| 1-0 | 38 | 1986 | Berliner Sommer | E54 Nimzo-Indian, 4.e3, Gligoric System |
21. R Vogel vs H Sonntag |
 | ½-½ | 10 | 1987 | Bundesliga 1987/88 | C32 King's Gambit Declined, Falkbeer Counter Gambit |
22. H Sonntag vs Spassky |
| ½-½ | 48 | 1987 | Bundesliga 1986/87 | C95 Ruy Lopez, Closed, Breyer |
23. H Bastian vs H Sonntag |
| ½-½ | 20 | 1988 | Bundesliga 1988/89 | C50 Giuoco Piano |
24. H Sonntag vs C Pieper-Emden |
| ½-½ | 15 | 1988 | Bundesliga 1988/89 | D11 Queen's Gambit Declined Slav |
25. H Sonntag vs O Seidler |
| ½-½ | 17 | 1988 | Bad Woerishofen Open | E43 Nimzo-Indian, Fischer Variation |