| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. K Jakubowski vs M Szymanski |
| ½-½ | 34 |
2001 |
ch-POL Boys U18 | C10 French |
| 27. K Jakubowski vs F Barglowski |
 | 1-0 | 31 |
2001 |
TCh-POL | C63 Ruy Lopez, Schliemann Defense |
| 28. Z Izoria vs K Jakubowski |
 | 1-0 | 36 |
2001 |
WYB18 | E00 Queen's Pawn Game |
| 29. K Jakubowski vs R Tomczak |
| 1-0 | 27 |
2001 |
ch-POL Boys U18 | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 30. J Dworakowska vs K Jakubowski |
| 1-0 | 45 |
2001 |
Polish Supercup | B62 Sicilian, Richter-Rauzer |
| 31. K Jakubowski vs J Wojcieszyn |
| 1-0 | 38 |
2001 |
TCh-POL | B77 Sicilian, Dragon, Yugoslav Attack |
| 32. P Kos vs K Jakubowski |
| ½-½ | 59 |
2001 |
ch-POL Boys U18 | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 33. P Lagowski vs K Jakubowski |
| 0-1 | 34 |
2001 |
ch-POL Boys U18 | E18 Queen's Indian, Old Main line, 7.Nc3 |
| 34. K Jakubowski vs S Krainski |
| ½-½ | 68 |
2001 |
TCh-POL | C10 French |
| 35. Rozentalis vs K Jakubowski |
| 1-0 | 67 |
2002 |
TCh-POL | B05 Alekhine's Defense, Modern |
| 36. E Vorobiov vs K Jakubowski |
| 0-1 | 40 |
2003 |
Cappelle La Grande | B90 Sicilian, Najdorf |
| 37. V Belov vs K Jakubowski |
| ½-½ | 23 |
2003 |
Cappelle La Grande | D37 Queen's Gambit Declined |
| 38. K Jakubowski vs T Moriuchi |
| 1-0 | 31 |
2003 |
Cappelle La Grande | C12 French, McCutcheon |
| 39. K Jakubowski vs G Timoshenko |
| 1-0 | 95 |
2003 |
Cappelle La Grande | B33 Sicilian |
| 40. K Jakubowski vs S Loskamp |
| 1-0 | 16 |
2003 |
Cappelle La Grande | B43 Sicilian, Kan, 5.Nc3 |
| 41. V Burmakin vs K Jakubowski |
| 1-0 | 42 |
2003 |
Cappelle La Grande | E18 Queen's Indian, Old Main line, 7.Nc3 |
| 42. S Vysochin vs K Jakubowski |
| 1-0 | 55 |
2003 |
Cappelle La Grande | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 43. K Jakubowski vs A Iljushin |
| ½-½ | 96 |
2003 |
Cappelle La Grande | C00 French Defense |
| 44. K Jakubowski vs Z Gyimesi |
| 0-1 | 52 |
2004 |
20th Cappelle la Grande | D02 Queen's Pawn Game |
| 45. A Bitalzadeh vs K Jakubowski |
| 0-1 | 34 |
2004 |
20th Cappelle la Grande | B90 Sicilian, Najdorf |
| 46. K Jakubowski vs S Sulskis |
| ½-½ | 47 |
2004 |
20th Cappelle la Grande | A47 Queen's Indian |
| 47. A Cichocki vs K Jakubowski |
| 0-1 | 65 |
2004 |
POL-chT | D35 Queen's Gambit Declined |
| 48. M Sorokin vs K Jakubowski |
| ½-½ | 29 |
2006 |
Cappelle la Grande | A46 Queen's Pawn Game |
| 49. K Jakubowski vs P Vavra |
| 1-0 | 19 |
2006 |
Brno Chess Festival | D10 Queen's Gambit Declined Slav |
| 50. B Heberla vs K Jakubowski |
| ½-½ | 47 |
2006 |
Polish Team Championship | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |