| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. M Godena vs M Olszewski |
| ½-½ | 43 | 2005 | European Championship | C96 Ruy Lopez, Closed |
| 27. M Olszewski vs G Dizdar |
| 0-1 | 48 | 2005 | European Championship | C15 French, Winawer |
| 28. K van der Weide vs M Olszewski |
 | 0-1 | 46 | 2005 | European Championship | C45 Scotch Game |
| 29. M Olszewski vs D Reinderman |
| ½-½ | 58 | 2005 | European Championship | B40 Sicilian |
| 30. M Perunovic vs M Olszewski |
| 1-0 | 27 | 2005 | European Championship | C96 Ruy Lopez, Closed |
| 31. M Kopczynski vs M Olszewski |
| 0-1 | 28 | 2005 | European Championship | C84 Ruy Lopez, Closed |
| 32. M Olszewski vs B Thorfinnsson |
| 0-1 | 60 | 2005 | European Championship | B80 Sicilian, Scheveningen |
| 33. M Olszewski vs M Neubauer |
| 1-0 | 26 | 2005 | European Championship | C11 French |
| 34. R Mamedov vs M Olszewski |
| 1-0 | 46 | 2005 | European Championship | C55 Two Knights Defense |
| 35. M Olszewski vs P Rakus |
| 1-0 | 32 | 2005 | Wch U16 | B30 Sicilian |
| 36. P Pachta vs M Olszewski |
| 1-0 | 43 | 2005 | Wch U16 | A57 Benko Gambit |
| 37. F Beck vs M Olszewski |
| ½-½ | 31 | 2005 | Wch U16 | C47 Four Knights |
| 38. G Lettieri vs M Olszewski |
| 0-1 | 38 | 2005 | Wch U16 | C45 Scotch Game |
| 39. M Olszewski vs M Flores |
| 1-0 | 34 | 2005 | Wch U16 | B40 Sicilian |
| 40. M Olszewski vs I Brener |
| 1-0 | 30 | 2005 | Wch U16 | B33 Sicilian |
| 41. M Olszewski vs X Vila Gazquez |
| 1-0 | 14 | 2005 | Wch U16 | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 42. G Rohit vs M Olszewski |
| 1-0 | 35 | 2005 | Wch U16 | C96 Ruy Lopez, Closed |
| 43. N Nguyen vs M Olszewski |
| 1-0 | 69 | 2005 | Wch U16 | A45 Queen's Pawn Game |
| 44. M Olszewski vs A Aleksandrov |
| 1-0 | 59 | 2005 | 5th Amplico AIG Life | C46 Three Knights |
| 45. J Gdanski vs M Olszewski |
| 1-0 | 53 | 2005 | 5th Amplico AIG Life | C96 Ruy Lopez, Closed |
| 46. Bologan vs M Olszewski |
| 1-0 | 42 | 2005 | 5th Amplico AIG Life | C96 Ruy Lopez, Closed |
| 47. M Olszewski vs T Warakomski |
| 1-0 | 47 | 2006 | POL-ch U18 | C90 Ruy Lopez, Closed |
| 48. M Olszewski vs W Moranda |
| 0-1 | 58 | 2006 | POL-ch U18 | B22 Sicilian, Alapin |
| 49. D Lampe vs M Olszewski |
| 0-1 | 19 | 2006 | Pardubice Open-A | C96 Ruy Lopez, Closed |
| 50. F Beck vs M Olszewski |
| 1-0 | 27 | 2006 | Pardubice Open-A | E11 Bogo-Indian Defense |
Kibitzing
