| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. J Szostko vs B Socko |
| 0-1 | 28 | 2012 | 12th MetLife Amplico European (Rapid) | A13 English |
| 2. Bluebaum vs J Szostko |
 | 1-0 | 48 | 2013 | European Championship | E04 Catalan, Open, 5.Nf3 |
| 3. J Szostko vs R Pasiev |
| 0-1 | 40 | 2013 | European Championship | A21 English |
| 4. A Matsenko vs J Szostko |
| ½-½ | 55 | 2013 | European Championship | B40 Sicilian |
| 5. R Ekstrom vs J Szostko |
| ½-½ | 50 | 2013 | European Championship | D30 Queen's Gambit Declined |
| 6. J Szostko vs A Duman |
| ½-½ | 41 | 2013 | European Championship | A15 English |
| 7. B C Yildiz Kadioglu vs J Szostko |
| ½-½ | 46 | 2013 | European Championship | B80 Sicilian, Scheveningen |
| 8. J Szostko vs J Szwed |
| 0-1 | 40 | 2013 | European Championship | A09 Reti Opening |
| 9. J Szostko vs K Nikolaidis |
| 1-0 | 37 | 2013 | European Championship | B13 Caro-Kann, Exchange |
| 10. M Kantorik vs J Szostko |
| 1-0 | 44 | 2013 | European Championship | D36 Queen's Gambit Declined, Exchange, Positional line, 6.Qc2 |
| 11. Z Andriasian vs J Szostko |
| 1-0 | 32 | 2013 | ch-European Blitz | A07 King's Indian Attack |
| 12. J Szostko vs Z Andriasian |
| ½-½ | 84 | 2013 | ch-European Blitz | A20 English |
| 13. J Szostko vs Rapport |
| 0-1 | 29 | 2013 | ch-European Rapid | A10 English |
| 14. M Admiraal vs J Szostko |
| 1-0 | 38 | 2014 | Cappelle Open | D35 Queen's Gambit Declined |
| 15. M Massoni vs J Szostko |
| ½-½ | 49 | 2014 | Cappelle Open | A13 English |
| 16. F Johnen vs J Szostko |
| 0-1 | 35 | 2015 | Bosna Open | A48 King's Indian |
| 17. J Szostko vs A Kovacevic |
| ½-½ | 46 | 2015 | Bosna Open | B94 Sicilian, Najdorf |
| 18. M Savic vs J Szostko |
| 1-0 | 73 | 2015 | Bosna Open | A07 King's Indian Attack |
| 19. J Szostko vs F Drino |
| 1-0 | 37 | 2015 | Bosna Open | B09 Pirc, Austrian Attack |
| 20. I Burovic vs J Szostko |
| 0-1 | 47 | 2015 | Bosna Open | A07 King's Indian Attack |
| 21. J Szostko vs P Nikolic |
| 0-1 | 70 | 2015 | Bosna Open | C03 French, Tarrasch |
| 22. J Szostko vs B Heberla |
| 0-1 | 41 | 2015 | Bosna Open | B00 Uncommon King's Pawn Opening |
| 23. B Popic vs J Szostko |
| 0-1 | 30 | 2015 | Bosna Open | E81 King's Indian, Samisch |
| 24. J Szostko vs M Jovovic |
| 1-0 | 38 | 2015 | Bosna Open | B96 Sicilian, Najdorf |
| 25. J Szostko vs V Pribyl |
| 1-0 | 38 | 2015 | Teplice Open | B94 Sicilian, Najdorf |
Kibitzing
