| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J Owczarzak vs J Smeets |
| ½-½ | 29 |
1998 |
EU-ch U14 | B01 Scandinavian |
| 2. J Owczarzak vs B Socko |
| 1-0 | 34 |
2000 |
Polish Team Championships | C16 French, Winawer |
| 3. B Katkowski vs J Owczarzak |
| ½-½ | 15 |
2001 |
ch-POL Boys U18 | C02 French, Advance |
| 4. P Lagowski vs J Owczarzak |
| ½-½ | 26 |
2001 |
ch-Pol u20 | D85 Grunfeld |
| 5. P Stoma vs J Owczarzak |
| 1-0 | 44 |
2001 |
Rubinstein Open | C44 King's Pawn Game |
| 6. J Owczarzak vs M Szymanski |
| ½-½ | 46 |
2001 |
ch-POL Boys U18 | C17 French, Winawer, Advance |
| 7. J Owczarzak vs A Mista |
| ½-½ | 19 |
2001 |
ch-Pol u20 | B09 Pirc, Austrian Attack |
| 8. J Owczarzak vs A Wisniewski |
| ½-½ | 17 |
2001 |
ch-Pol u20 | C01 French, Exchange |
| 9. S Demidenko vs J Owczarzak |
| ½-½ | 14 |
2001 |
Rubinstein Open | C01 French, Exchange |
| 10. J Owczarzak vs A Mista |
 | 0-1 | 34 |
2001 |
ch-POL Boys U18 | B09 Pirc, Austrian Attack |
| 11. J Owczarzak vs M Szelag |
| 1-0 | 57 |
2001 |
ch-Pol u20 | B90 Sicilian, Najdorf |
| 12. J Owczarzak vs P Balcerak |
| 1-0 | 37 |
2001 |
Rubinstein Open | B84 Sicilian, Scheveningen |
| 13. J Owczarzak vs R Krajewski |
| 1-0 | 29 |
2001 |
ch-POL Boys U18 | B07 Pirc |
| 14. J Owczarzak vs M Dziuba |
| ½-½ | 33 |
2001 |
ch-POL Boys U18 | B40 Sicilian |
| 15. M Stryjecki vs J Owczarzak |
| ½-½ | 14 |
2001 |
ch-Pol u20 | A07 King's Indian Attack |
| 16. J Owczarzak vs J Gralka |
| ½-½ | 14 |
2001 |
Rubinstein Open | B14 Caro-Kann, Panov-Botvinnik Attack |
| 17. D Janaszak vs J Owczarzak |
| ½-½ | 10 |
2001 |
ch-POL Boys U18 | C02 French, Advance |
| 18. R Tomczak vs J Owczarzak |
| ½-½ | 22 |
2001 |
ch-Pol u20 | C01 French, Exchange |
| 19. R Kempinski vs J Owczarzak |
| 1-0 | 35 |
2001 |
Rubinstein Open | D85 Grunfeld |
| 20. P Beben vs J Owczarzak |
| ½-½ | 39 |
2001 |
ch-POL Boys U18 | D85 Grunfeld |
| 21. S Zawadzki vs J Owczarzak |
| 0-1 | 39 |
2001 |
ch-POL Boys U18 | C19 French, Winawer, Advance |
| 22. J Owczarzak vs S Zawadzki |
| ½-½ | 24 |
2001 |
ch-Pol u20 | B32 Sicilian |
| 23. R Pyka vs J Owczarzak |
| ½-½ | 45 |
2001 |
Rubinstein Open | C18 French, Winawer |
| 24. J Owczarzak vs M Paterek |
| 1-0 | 53 |
2001 |
ch-POL Boys U18 | B09 Pirc, Austrian Attack |
| 25. J Owczarzak vs I Rajlich |
| ½-½ | 25 |
2001 |
ch-Pol u20 | C16 French, Winawer |