| Nov 22, 2025 | Mrazek | 0–1 | Vysinsky | Polofinale MCR junioru 2025 | Sicilian Defense: Old Sicilian | |
| Nov 21, 2025 | Tegda | 1–0 | Mrazek | Polofinale MCR junioru 2025 | Sicilian Defense: Smith-Morra Gambit | |
| Nov 20, 2025 | Setina | ½–½ | Mrazek | Polofinale MCR junioru 2025 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Nov 19, 2025 | Mrazek | 0–1 | Belaska | Polofinale MCR junioru 2025 | Sicilian Defense: O'Kelly Variation, Quiet System | |
| Nov 18, 2025 | Babicky | 0–1 | Mrazek | Polofinale MCR junioru 2025 | Sicilian Defense: Alapin Variation | |
| Nov 18, 2025 | Mrazek | ½–½ | Sadil | Polofinale MCR junioru 2025 | Sicilian Defense: French Variation | |
| Nov 17, 2025 | Bezdek | 1–0 | Mrazek | Polofinale MCR junioru 2025 | Rapport-Jobava System | |
| Nov 16, 2025 | Svadlenka | 0–1 | Mrazek | Polofinale MCR junioru 2025 | Slav Defense: Czech Variation, Bled Attack | |
| Nov 16, 2025 | Mrazek | 0–1 | Andrle | Polofinale MCR junioru 2025 | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Aug 18, 2024 | Plesnik | ½–½ | Mrazek | Round 2: Plesnik, Vladimir - Mrazek, Roman | Queen's Pawn Game: Colle System | |
| Aug 17, 2024 | Mrazek | 1–0 | Souralova | Round 1: Mrazek, Roman - Souralova, Venuse | Queen's Gambit Declined | |
| Jan 13, 2023 | Pejrimovsky | ½–½ | Mrazek | Prague Open | Czech Tour | ? | |
| Jan 12, 2023 | Shamsuddin | * | Mrazek | Prague Open | Czech Tour | ? | |
| Jan 10, 2023 | Mrazek | * | Kuznecova | Prague Open | Czech Tour | ? | |
| Jan 6, 2023 | Koper | ½–½ | Mrazek | Prague Open | Czech Tour | ? | |
| Jul 6, 2021 | Mrazek | 1–0 | Beran | Bohumin Open | Ruy Lopez: Steinitz Defense | |
| — | Mrazek | 1–0 | Nisztuk | Round 1: Mrazek, Roman - Nisztuk, Michal | Queen's Pawn Game | |
| — | Mrazek | 1–0 | Kvapilova | Round 3: Mrazek, Roman - Kvapilova, Lucie | Queen's Pawn Game: Colle System | |
| — | Mrazek | ½–½ | Parak | Round 3: Mrazek, Roman - Parak, Dominik | French Defense: Exchange Variation | |
| — | Mrazek | ½–½ | Haidenko | Round 5: Mrazek, Roman - Haidenko, Mykola | Queen's Pawn Game: Colle System | |
| — | Mrazek | ½–½ | Swislowski | Round 7: Mrazek, Roman - Swislowski, Jan | Indian Defense: Spielmann-Indian | |
| — | Mrazek | 0–1 | Zelenkova | Round 9: Mrazek, Roman - Zelenkova, Sofie | Queen's Pawn Game | |
| — | Kampik | 0–1 | Mrazek | Round 2: Kampik, David - Mrazek, Roman | English Opening: King's English Variation | |
| — | Marak | 1–0 | Mrazek | Round 4: Marak, Jakub - Mrazek, Roman | Sicilian Defense: Moscow Variation, Main Line | |
| — | Walder | ½–½ | Mrazek | Round 4: Walder, Hugo - Mrazek, Roman | French Defense: Exchange Variation | |
| — | Druzd | 1–0 | Mrazek | Round 6: Druzd, Szymon - Mrazek, Roman | French Defense: Alekhine-Chatard Attack | |
| — | Jurcek | ½–½ | Mrazek | Round 8: Jurcek, Adrian - Mrazek, Roman | French Defense: Exchange Variation | |
| — | Zidek | ½–½ | Mrazek | Round 9: Zidek, Damian - Mrazek, Roman | Slav Defense: Czech Variation, Bled Attack | |
