| Jun 23, 2026 | Koehalmi-Szabo | ½–½ | Kurmann | SUI-chT Wollishofen-Luzern | Sicilian Defense: Four Knights Variation | |
| Jun 23, 2026 | Koehalmi-Szabo | 0–1 | Georgiadis | SUI-chT Wollishofen-Riehen | Vienna Game: Falkbeer Variation | |
| May 25, 2026 | Pellegrini | 0–1 | Koehalmi-Szabo | Swiss Youth Championship 2026 U16 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| May 24, 2026 | Koehalmi-Szabo | ½–½ | Federer | Swiss Youth Championship 2026 U16 | Sicilian Defense: Najdorf Variation, English Attack | |
| May 24, 2026 | Koehalmi-Szabo | 1–0 | Jordan | Swiss Youth Championship 2026 U16 | Caro-Kann Defense: Panov Attack | |
| May 23, 2026 | Piacquadio | 0–1 | Koehalmi-Szabo | Swiss Youth Championship 2026 U16 | Tarrasch Defense: Classical Variation, Réti Variation | |
| May 22, 2026 | Pfaltz | ½–½ | Koehalmi-Szabo | Swiss Youth Championship 2026 U16 | Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6 | |
| May 22, 2026 | Koehalmi-Szabo | 1–0 | Akinkhov | Swiss Youth Championship 2026 U16 | Vienna Game: Max Lange Defense | |
| Apr 21, 2026 | Koehalmi-Szabo | 1–0 | Gantner | SMM NLA 2026 | Vienna Game: Falkbeer Variation | |
| Apr 3, 2026 | Barp | 1–0 | Koehalmi-Szabo | Grenke Chess Festival 2026 Open | Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch | |
| Mar 23, 2026 | Koehalmi-Szabo | 0–1 | Kanana | Swiss Youth Championship 2026 U16 | Vienna Game: Falkbeer Variation | |
| Mar 17, 2026 | Aeschbacher | ½–½ | Koehalmi-Szabo | SUI-chT Geneve-Wollishofen | Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6 | |
| Oct 19, 2025 | Piacquadio | ½–½ | Koehalmi-Szabo | new tournament description | Tarrasch Defense: Classical Variation, Réti Variation | |
| Oct 19, 2025 | Koehalmi-Szabo | 1–0 | Schoenbaechler | new tournament description | Sicilian Defense: Kramnik Variation | |
| Oct 18, 2025 | Zargarov | 0–1 | Koehalmi-Szabo | new tournament description | Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch | |
| Oct 18, 2025 | Koehalmi-Szabo | 1–0 | Fernandes Barbosa | new tournament description | Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation | |
| Oct 17, 2025 | Suseenthiram | 0–1 | Koehalmi-Szabo | new tournament description | Tarrasch Defense | |
| Oct 17, 2025 | Koehalmi-Szabo | 1–0 | Arocha | new tournament description | Modern Defense: Geller's System | |
| Jun 8, 2025 | Koehalmi-Szabo | 1–0 | Palairet | Swiss Youtch Chess Championship 2025 U14 | Caro-Kann Defense: Endgame Offer | |
| Jun 8, 2025 | Madhavan | ½–½ | Koehalmi-Szabo | Swiss Youtch Chess Championship 2025 U14 | Tarrasch Defense: Classical Variation, Réti Variation | |
| Jun 7, 2025 | Koehalmi-Szabo | 0–1 | Shevchenko | Swiss Youtch Chess Championship 2025 U14 | Caro-Kann Defense: Panov Attack, Modern Defense | |
| Jun 7, 2025 | Tkhoruk | 0–1 | Koehalmi-Szabo | Swiss Youtch Chess Championship 2025 U14 | Tarrasch Defense: Symmetrical Variation | |
| Jun 6, 2025 | Koehalmi-Szabo | 0–1 | Federer | Swiss Youtch Chess Championship 2025 U14 | Sicilian Defense: Najdorf Variation, Freak Attack | |
| Jun 6, 2025 | Seah | 0–1 | Koehalmi-Szabo | Swiss Youtch Chess Championship 2025 U14 | Queen's Pawn Game: Krause Variation | |
| Jun 1, 2025 | Koehalmi-Szabo | 1–0 | Saminskij | Round 7: Koehalmi-Szabo, Mihaly - Saminskij, Jan | French Defense: Advance Variation, Euwe Variation | |
| May 29, 2025 | Koehalmi-Szabo | 0–1 | Gut | Round 2: Koehalmi-Szabo, Mihaly - Gut, Lionel | Sicilian Defense: Chekhover Variation | |
| May 19, 2025 | Koehalmi-Szabo | ½–½ | Saminskij | Swiss Youtch Chess Championship 2025 U14 | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| May 20, 2024 | Koehalmi-Szabo | ½–½ | Kanana | Schweizer Jugend Einzelmeisterschaft 2024 | Caro-Kann Defense: Endgame Offer | |
| May 19, 2024 | Koehalmi-Szabo | ½–½ | Udipi | Schweizer Jugend Einzelmeisterschaft 2024 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| May 19, 2024 | Angelovski | ½–½ | Koehalmi-Szabo | Schweizer Jugend Einzelmeisterschaft 2024 | Sicilian Defense: Grand Prix Attack | |
| May 18, 2024 | Koehalmi-Szabo | 0–1 | Federer | Schweizer Jugend Einzelmeisterschaft 2024 | Sicilian Defense: Chekhover Variation | |
| May 18, 2024 | Pfaltz | 0–1 | Koehalmi-Szabo | Schweizer Jugend Einzelmeisterschaft 2024 | Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line | |
| May 17, 2024 | Koehalmi-Szabo | 1–0 | Madhavan | Schweizer Jugend Einzelmeisterschaft 2024 | Sicilian Defense: Kramnik Variation | |
| May 17, 2024 | Van Aepelen | ½–½ | Koehalmi-Szabo | Schweizer Jugend Einzelmeisterschaft 2024 | Tarrasch Defense: Schara Gambit | |
| May 29, 2023 | Ingielewicz | 0–1 | Koehalmi-Szabo | Schweizer Jugend Einzelmeisterschaft 2023 U12 | Tarrasch Defense: Symmetrical Variation | |
| May 28, 2023 | Koehalmi-Szabo | 0–1 | Federer | Schweizer Jugend Einzelmeisterschaft 2023 U12 | Sicilian Defense: Chekhover Variation | |
| May 28, 2023 | Koehalmi-Szabo | 1–0 | Saminskij | Schweizer Jugend Einzelmeisterschaft 2023 U12 | Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | |
| May 27, 2023 | Koehalmi-Szabo | 0–1 | Pfaltz | Schweizer Jugend Einzelmeisterschaft 2023 U12 | Sicilian Defense: Chekhover Variation | |
| May 27, 2023 | Aeschbacher | 0–1 | Koehalmi-Szabo | Schweizer Jugend Einzelmeisterschaft 2023 U12 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| May 26, 2023 | Koehalmi-Szabo | 1–0 | Bhingare | Schweizer Jugend Einzelmeisterschaft 2023 U12 | Vienna Game: Max Lange Defense | |
| May 26, 2023 | Begdullayev | 0–1 | Koehalmi-Szabo | Schweizer Jugend Einzelmeisterschaft 2023 U12 | English Opening: King's English Variation | |
| Aug 1, 2021 | Koehalmi-Szabo | 1–0 | Galbaatar | World Youth Cup 2021 O10-G18 - Open 10 | Caro-Kann Defense: Panov Attack | |
| Aug 1, 2021 | Koehalmi-Szabo | 0–1 | Sarkar | World Youth Cup 2021 O10-G18 - Open 10 | Sicilian Defense: Scheveningen Variation, English Attack, with f3 | |
| Aug 1, 2021 | Koehalmi-Szabo | 1–0 | Zahid | World Youth Cup 2021 O10-G18 - Open 10 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Aug 1, 2021 | Koehalmi-Szabo | 1–0 | Bhaavan | World Youth Cup 2021 O10-G18 - Open 10 | Petrov's Defense: Stafford Gambit | |
| Aug 1, 2021 | Koehalmi-Szabo | 0–1 | Bisht | World Youth Cup 2021 O10-G18 - Open 10 | French Defense: Winawer Variation, Advance Variation | |
| Aug 1, 2021 | Murawski | 1–0 | Koehalmi-Szabo | World Youth Cup 2021 O10-G18 - Open 10 | Nimzo-Indian Defense: Three Knights Variation | |
| Aug 1, 2021 | Jaikaran | 0–1 | Koehalmi-Szabo | World Youth Cup 2021 O10-G18 - Open 10 | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Aug 1, 2021 | Liu | 0–1 | Koehalmi-Szabo | World Youth Cup 2021 O10-G18 - Open 10 | Sicilian Defense: Najdorf Variation, English Attack | |
| Aug 1, 2021 | Altansoyombo | 1–0 | Koehalmi-Szabo | World Youth Cup 2021 O10-G18 - Open 10 | Sicilian Defense: Moscow Variation, Main Line | |
| Aug 1, 2021 | M | 0–1 | Koehalmi-Szabo | World Youth Cup 2021 O10-G18 - Open 10 | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
