| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Y Zimmerman vs S Cao |
| 1-0 | 60 |
1995 |
First Saturday GM Dec. | E12 Queen's Indian |
| 2. K Honfi vs Y Zimmerman |
| 0-1 | 36 |
1995 |
Budapest FS10 IM-A | B07 Pirc |
| 3. Y Zimmerman vs Tringov |
| 1-0 | 35 |
1996 |
Cetinje | A56 Benoni Defense |
| 4. M Klicnar vs Y Zimmerman |
| 0-1 | 39 |
1999 |
Budapest First Saturday IM04 A, HUN | B07 Pirc |
| 5. Y Zimmerman vs H Mossong |
| 1-0 | 46 |
1999 |
Budapest First Saturday IM04 A, HUN | A55 Old Indian, Main line |
| 6. Y Zimmerman vs H Ganaus |
| 1-0 | 41 |
1999 |
Budapest First Saturday IM04 A, HUN | E38 Nimzo-Indian, Classical, 4...c5 |
| 7. Y Zimmerman vs B Lengyel |
| 1-0 | 55 |
1999 |
Budapest First Saturday IM04 A, HUN | D35 Queen's Gambit Declined |
| 8. C Wagner vs Y Zimmerman |
| 0-1 | 76 |
1999 |
Budapest First Saturday IM04 A, HUN | B07 Pirc |
| 9. J Wallner vs Y Zimmerman |
| 0-1 | 31 |
1999 |
Budapest First Saturday IM04 A, HUN | B08 Pirc, Classical |
| 10. Y Zimmerman vs K Neumeier |
| 1-0 | 37 |
1999 |
Budapest First Saturday IM04 A, HUN | E76 King's Indian, Four Pawns Attack |
| 11. V Sikula vs Y Zimmerman |
| 0-1 | 26 |
2000 |
FSIMB February | B07 Pirc |
| 12. Y Zimmerman vs A Jakab |
| 1-0 | 31 |
2000 |
Budapest FS03 IM-C | E11 Bogo-Indian Defense |
| 13. E N Cooke vs Y Zimmerman |
 | 0-1 | 20 |
2001 |
FSIMA August | E83 King's Indian, Samisch |
| 14. J Szabolcsi vs Y Zimmerman |
| 0-1 | 54 |
2001 |
17th Spring Festival | E63 King's Indian, Fianchetto, Panno Variation |
| 15. D Berczes vs Y Zimmerman |
| 0-1 | 62 |
2001 |
17th Spring Festival | B09 Pirc, Austrian Attack |
| 16. Y Zimmerman vs M Nezar |
| 1-0 | 72 |
2001 |
FSIMA April | D12 Queen's Gambit Declined Slav |
| 17. Y Zimmerman vs G Pirisi |
| 1-0 | 23 |
2001 |
FSIMA August | E70 King's Indian |
| 18. N Resika vs Y Zimmerman |
| 0-1 | 36 |
2001 |
17th Spring Festival | B08 Pirc, Classical |
| 19. M Goczo vs Y Zimmerman |
| 0-1 | 35 |
2001 |
FSIMB March | E60 King's Indian Defense |
| 20. Y Zimmerman vs A Spielmann |
| 1-0 | 21 |
2001 |
FSIMA April | D25 Queen's Gambit Accepted |
| 21. C Bognar vs Y Zimmerman |
| 0-1 | 23 |
2001 |
FSIMA August | E83 King's Indian, Samisch |
| 22. Y Zimmerman vs Z Erdelyi |
 | 1-0 | 21 |
2001 |
17th Spring Festival | E76 King's Indian, Four Pawns Attack |
| 23. Y Zimmerman vs C Philippe |
| 1-0 | 43 |
2001 |
FSIMB March | A81 Dutch |
| 24. Y Zimmerman vs A Sendur |
| 1-0 | 76 |
2001 |
FSIMA April | E12 Queen's Indian |
| 25. Y Zimmerman vs N Moloney |
| 1-0 | 46 |
2001 |
FSIMA August | E12 Queen's Indian |