| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Barsov vs Y Zimmerman |
| ½-½ | 15 |
1991 |
Russian Winter op | E90 King's Indian |
| 2. T Gelashvili vs Y Zimmerman |
| ½-½ | 53 |
1993 |
Bratislava op | A26 English |
| 3. Y Zimmerman vs S Cao |
| 1-0 | 60 |
1995 |
First Saturday GM Dec. | E12 Queen's Indian |
| 4. K Honfi vs Y Zimmerman |
| 0-1 | 36 |
1995 |
Budapest FS10 IM-A | B07 Pirc |
| 5. Y Zimmerman vs Tringov |
| 1-0 | 35 |
1996 |
Cetinje | A56 Benoni Defense |
| 6. Y Zimmerman vs Sandor Olah |
| ½-½ | 56 |
1997 |
Erkel mem op | E76 King's Indian, Four Pawns Attack |
| 7. A Gavrilov vs Y Zimmerman |
| 1-0 | 50 |
1997 |
Ceske Budejovice op | B26 Sicilian, Closed, 6.Be3 |
| 8. C Horvath vs Y Zimmerman |
| 1-0 | 67 |
1998 |
First Saturday GM December | B07 Pirc |
| 9. Y Zimmerman vs A Vaulin |
| ½-½ | 25 |
1998 |
First Saturday GM December | B09 Pirc, Austrian Attack |
| 10. M Klicnar vs Y Zimmerman |
| 0-1 | 39 |
1999 |
Budapest First Saturday IM04 A, HUN | B07 Pirc |
| 11. Mikhalchishin vs Y Zimmerman |
| 1-0 | 58 |
1999 |
Bled open | A15 English |
| 12. Y Zimmerman vs H Mossong |
| 1-0 | 46 |
1999 |
Budapest First Saturday IM04 A, HUN | A55 Old Indian, Main line |
| 13. Y Zimmerman vs H Ganaus |
| 1-0 | 41 |
1999 |
Budapest First Saturday IM04 A, HUN | E38 Nimzo-Indian, Classical, 4...c5 |
| 14. Y Zimmerman vs S Atalik |
| ½-½ | 48 |
1999 |
Bled open | D85 Grunfeld |
| 15. Y Zimmerman vs B Lengyel |
| 1-0 | 55 |
1999 |
Budapest First Saturday IM04 A, HUN | D35 Queen's Gambit Declined |
| 16. Y Zimmerman vs Bu Xiangzhi |
| 0-1 | 69 |
1999 |
Budapest FS03 IM | A65 Benoni, 6.e4 |
| 17. C Wagner vs Y Zimmerman |
| 0-1 | 76 |
1999 |
Budapest First Saturday IM04 A, HUN | B07 Pirc |
| 18. J Wallner vs Y Zimmerman |
| 0-1 | 31 |
1999 |
Budapest First Saturday IM04 A, HUN | B08 Pirc, Classical |
| 19. Y Zimmerman vs S Farago |
| 0-1 | 60 |
1999 |
Budapest First Saturday IM04 A, HUN | E76 King's Indian, Four Pawns Attack |
| 20. Y Zimmerman vs K Neumeier |
| 1-0 | 37 |
1999 |
Budapest First Saturday IM04 A, HUN | E76 King's Indian, Four Pawns Attack |
| 21. Sax vs Y Zimmerman |
 | 1-0 | 23 |
1999 |
Bled open | B07 Pirc |
| 22. M Bawart vs Y Zimmerman |
| ½-½ | 10 |
1999 |
Budapest First Saturday IM04 A, HUN | E92 King's Indian |
| 23. Y Zimmerman vs A Jakab |
| 1-0 | 31 |
2000 |
Budapest FS03 IM-C | E11 Bogo-Indian Defense |
| 24. V Sikula vs Y Zimmerman |
| 0-1 | 26 |
2000 |
FSIMB February | B07 Pirc |
| 25. M Goczo vs Y Zimmerman |
| 0-1 | 35 |
2001 |
FSIMB March | E60 King's Indian Defense |