| Jun 24, 2026 | Koukola | 1–0 | Mikulec | Round 9: Koukola, Stepan - Mikulec, Eduard | Scotch Game: Scotch Gambit, Advance Variation | |
| Jun 23, 2026 | Prach | 1–0 | Koukola | Round 4: Prach, Simon - Koukola, Stepan | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jun 23, 2026 | Koukola | 0–1 | Lackova | Round 3: Koukola, Stepan - Lackova, Lucie | Caro-Kann Defense: Tartakower Variation, Perlis Line | |
| Jun 23, 2026 | Vydra | 1–0 | Koukola | Round 2: Vydra, David - Koukola, Stepan | French Defense: Rubinstein Variation, Fort Knox Variation | |
| Jun 24, 2025 | Koukola | 1–0 | Sanovec | Round 4: Koukola, Stepan - Sanovec, Ondrej | Four Knights Game: Scotch Variation Accepted | |
| Jun 7, 2024 | Koukola | 1–0 | McInerney | Round 9: Koukola, Stepan - McInerney, Kevin | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Jun 6, 2024 | Devine | 1–0 | Koukola | Round 8: Devine, Daniel - Koukola, Stepan | Caro-Kann Defense: Panov Attack, Modern Defense | |
| Jun 5, 2024 | Brennan | 0–1 | Koukola | Round 7: Brennan, Thomas - Koukola, Stepan | French Defense: Advance Variation | |
| Jun 4, 2024 | Koukola | ½–½ | Luque Granell | Round 6: Koukola, Stepan - Luque Granell, Eloi | Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | |
| Jun 3, 2024 | Koukola | 0–1 | Agarwal | Round 5: Koukola, Stepan - Agarwal, Riyansh | Scotch Game: Schmidt Variation | |
| Jun 3, 2024 | Gernert | 1–0 | Koukola | Round 4: Gernert, Tomas - Koukola, Stepan | Indian Defense: Spielmann-Indian | |
| Jun 2, 2024 | Moran | 0–1 | Koukola | Round 3: Moran, Liam - Koukola, Stepan | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jun 1, 2024 | Koukola | 0–1 | Ioannidis | Round 2: Koukola, Stepan - Ioannidis, Konstantinos I | Caro-Kann Defense: Classical Variation, Flohr Variation | |
| May 31, 2024 | Williams | 0–1 | Koukola | Round 1: Williams, Henry - Koukola, Stepan | Indian Defense | |
| Jun 24, 2023 | Koukola | 1–0 | Hrabe | 18. Zlata Praha Junior Open | Caro-Kann Defense: Advance Variation, Short Variation | |
| Jun 24, 2023 | Koukola | 0–1 | Simek | 18. Zlata Praha Junior Open | Alekhine Defense: Balogh Variation | |
| Jun 24, 2023 | Koukola | 1–0 | Musil | 18. Zlata Praha Junior Open | ? | |
| Jun 24, 2023 | Koukola | ½–½ | Nguyen Quyet | 18. Zlata Praha Junior Open | ? | |
| Jun 24, 2023 | Koukola | 1–0 | Suchanek | 18. Zlata Praha Junior Open | Scandinavian Defense: Main Line | |
| Jun 24, 2023 | Portesova | 1–0 | Koukola | 18. Zlata Praha Junior Open | Sicilian Defense: Old Sicilian | |
| Jun 24, 2023 | Jakoubek | 1–0 | Koukola | 18. Zlata Praha Junior Open | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 24, 2023 | Simek | 0–1 | Koukola | 18. Zlata Praha Junior Open | Sicilian Defense: Old Sicilian | |
| Jun 24, 2023 | Koslerova | 1–0 | Koukola | 18. Zlata Praha Junior Open | Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation | |
