Game |
| Result | Moves |
Year | Event/Locale | Opening |
101. Filip Michalski vs J Koscielski |
| 1-0 | 36 | 2017 | European Blitz Championship | E92 King's Indian |
102. J Koscielski vs Filip Michalski |
| ½-½ | 43 | 2017 | European Blitz Championship | C41 Philidor Defense |
103. J Koscielski vs L Zaleski |
| 1-0 | 27 | 2017 | European Rapid Championship | C05 French, Tarrasch |
104. J Koscielski vs V Kovalev |
  | ½-½ | 42 | 2017 | European Rapid Championship | C48 Four Knights |
105. A Saric vs J Koscielski |
| ½-½ | 62 | 2017 | European Rapid Championship | A05 Reti Opening |
106. F B Olsen vs J Koscielski |
| ½-½ | 38 | 2017 | European Rapid Championship | E90 King's Indian |
107. J Koscielski vs T Jaskolka |
| 1-0 | 60 | 2017 | European Rapid Championship | C48 Four Knights |
108. J Stocek vs J Koscielski |
| 1-0 | 41 | 2017 | European Rapid Championship | E92 King's Indian |
109. J Koscielski vs Evgeniy Slipchuk |
| ½-½ | 39 | 2017 | European Rapid Championship | B31 Sicilian, Rossolimo Variation |
110. M Brzezinski vs J Koscielski |
| 1-0 | 52 | 2017 | European Rapid Championship | A45 Queen's Pawn Game |
111. D L Haydon vs J Koscielski |
| 0-1 | 72 | 2022 | European Blitz Chess Championship | E62 King's Indian, Fianchetto |
112. J Koscielski vs D L Haydon |
| 0-1 | 23 | 2022 | European Blitz Chess Championship | B18 Caro-Kann, Classical |
113. J Koscielski vs Karol Kacprzak |
| 0-1 | 32 | 2022 | European Blitz Chess Championship | B22 Sicilian, Alapin |
114. Karol Kacprzak vs J Koscielski |
| 1-0 | 50 | 2022 | European Blitz Chess Championship | B11 Caro-Kann, Two Knights, 3...Bg4 |