| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. L Zimmermann vs B Neuenschwander |
| ½-½ | 19 | 1978 | European Junior Championship 1978/79 | B22 Sicilian, Alapin |
| 2. L Zimmermann vs R Ratti |
| 1-0 | 28 | 1979 | European Junior Championship 1978/79 | B22 Sicilian, Alapin |
| 3. L Zimmermann vs L Arnold |
| 1-0 | 39 | 1979 | European Junior Championship 1978/79 | B22 Sicilian, Alapin |
| 4. L Zimmermann vs R Wostyn |
| ½-½ | 46 | 1979 | Belgian Championship | B22 Sicilian, Alapin |
| 5. L Zimmermann vs T Dekker |
| 1-0 | 41 | 1999 | Dutch Open | B22 Sicilian, Alapin |
| 6. L Zimmermann vs S Algera |
| 0-1 | 28 | 1999 | Dutch Open | B22 Sicilian, Alapin |
| 7. L Zimmermann vs G Molinari |
| 0-1 | 34 | 1999 | Dutch Open | B22 Sicilian, Alapin |
| 8. L Zimmermann vs J Jens |
| 0-1 | 21 | 2001 | Dieren op | B22 Sicilian, Alapin |
| 9. L Zimmermann vs S Algera |
| 1-0 | 46 | 2001 | Dieren op | B22 Sicilian, Alapin |
| 10. L Zimmermann vs P Husted |
| ½-½ | 89 | 2003 | Dutch Open | B22 Sicilian, Alapin |
| 11. L Zimmermann vs D Oswald |
| 0-1 | 52 | 2013 | European Club Cup | B22 Sicilian, Alapin |
| 12. L Zimmermann vs A Manukonda |
| 1-0 | 48 | 2021 | Biel Master Open | B22 Sicilian, Alapin |
| 13. L Zimmermann vs N Zwirs |
| 0-1 | 28 | 2023 | Dutch League 2023/24 | B22 Sicilian, Alapin |
| 14. L Zimmermann vs F Svane |
| 0-1 | 35 | 2024 | Sparkassen Open-A | B22 Sicilian, Alapin |
| 15. L Zimmermann vs A Schloesser |
| ½-½ | 12 | 2024 | Sparkassen Open-A | B22 Sicilian, Alapin |
Kibitzing
