| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. A Bryntse vs Ulf Andersson |
| 1-0 | 32 |
1968 |
corr | A02 Bird's Opening |
| 2. Vaganian vs Ulf Andersson |
 | 1-0 | 48 |
1968 |
Groningen | A97 Dutch, Ilyin-Genevsky |
| 3. Ulf Andersson vs Ribli |
| 0-1 | 42 |
1969 |
Groningen | A04 Reti Opening |
| 4. Ekenberg vs Ulf Andersson |
| 1-0 | 63 |
1969 |
Sverige | A02 Bird's Opening |
| 5. Vaganian vs Ulf Andersson |
| 1-0 | 41 |
1969 |
EU-ch U20 prel | E69 King's Indian, Fianchetto, Classical Main line |
| 6. Karpov vs Ulf Andersson |
| 1-0 | 60 |
1969 |
Stockholm | C97 Ruy Lopez, Closed, Chigorin |
| 7. Ghizdavu vs Ulf Andersson |
| 1-0 | 27 |
1969 |
Netherlands | C77 Ruy Lopez |
| 8. A Planinc vs Ulf Andersson |
| 1-0 | 36 |
1970 |
Ch Yugoslavia, Sombor (Yugoslavia) | B45 Sicilian, Taimanov |
| 9. Ulf Andersson vs Smejkal |
| 0-1 | 35 |
1970 |
Zt (play-off), Prague (Czech Republic) | C73 Ruy Lopez, Modern Steinitz Defense |
| 10. Fischer vs Ulf Andersson |
| 1-0 | 43 |
1970 |
Siegen Exhibition Ga | A01 Nimzovich-Larsen Attack |
| 11. G Antunac vs Ulf Andersson |
| 1-0 | 42 |
1970 |
Wijk aan Zee (Netherlands) | E91 King's Indian |
| 12. Larsen vs Ulf Andersson |
| 1-0 | 48 |
1970 |
Siegen (Germany) | C09 French, Tarrasch, Open Variation, Main line |
| 13. K Honfi vs Ulf Andersson |
| 1-0 | 53 |
1970 |
Wijk aan Zee | C50 Giuoco Piano |
| 14. Gheorghiu vs Ulf Andersson |
| 1-0 | 37 |
1970 |
Siegen (Germany) | D32 Queen's Gambit Declined, Tarrasch |
| 15. S Mariotti vs Ulf Andersson |
| 1-0 | 35 |
1970 |
Sombor | B06 Robatsch |
| 16. Ivkov vs Ulf Andersson |
| 1-0 | 40 |
1970 |
Prag | A56 Benoni Defense |
| 17. Ulf Andersson vs Browne |
| 0-1 | 47 |
1970 |
Siegen ol (Men) fin-B | A37 English, Symmetrical |
| 18. Portisch vs Ulf Andersson |
| 1-0 | 51 |
1970 |
Zt (play-off), Prague (Czech Republic) | E46 Nimzo-Indian |
| 19. Ulf Andersson vs Ribli |
| 0-1 | 45 |
1970 |
Debrecen | B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4 |
| 20. I Radulov vs Ulf Andersson |
| 1-0 | 38 |
1970 |
Siegen olm prel | B90 Sicilian, Najdorf |
| 21. Ivkov vs Ulf Andersson |
| 1-0 | 34 |
1971 |
Wijk aan Zee (Netherlands) | D78 Neo-Grunfeld, 6.O-O c6 |
| 22. A Pomar-Salamanca vs Ulf Andersson |
| 1-0 | 45 |
1971 |
Olot | D78 Neo-Grunfeld, 6.O-O c6 |
| 23. Ulf Andersson vs Hort |
| 0-1 | 60 |
1971 |
Wijk aan Zee | B48 Sicilian, Taimanov Variation |
| 24. Teschner vs Ulf Andersson |
| 1-0 | 40 |
1971 |
FRG-ch int | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
| 25. Hug vs Ulf Andersson |
| 1-0 | 37 |
1971 |
West Berlin (Germany) | E11 Bogo-Indian Defense |
