| Jun 23, 2026 | Saminskij | ½–½ | Mattenberger | SUI-chT Wollishofen-Luzern | Sicilian Defense: Najdorf Variation | |
| Jun 23, 2026 | Mattenberger | 1–0 | Rotunno | SUI-chT Luzern-Echallens | Sicilian Defense: Alapin Variation | |
| May 10, 2026 | Mattenberger | ½–½ | Bournel | mitropa-men | Nimzo-Indian Defense: Normal Variation | |
| May 9, 2026 | Gnojek | ½–½ | Mattenberger | mitropa-men | Slav Defense: Czech Variation, Classical System, Main Line | |
| May 8, 2026 | Mattenberger | 1–0 | Kozlovic | mitropa-men | English Opening: Mikenas-Carls Variation | |
| May 7, 2026 | Schuricht | ½–½ | Mattenberger | mitropa-men | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| May 6, 2026 | Mattenberger | ½–½ | Sundac | mitropa-men | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 5, 2026 | Matyassy | 0–1 | Mattenberger | mitropa-men | Indian Defense: Accelerated London System | |
| May 4, 2026 | Mattenberger | 1–0 | Bochnicka | mitropa-men | Sicilian Defense: Alapin Variation | |
| May 3, 2026 | Stickler | 1–0 | Mattenberger | mitropa-men | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| Apr 21, 2026 | Petkidis | 1–0 | Mattenberger | SMM NLA 2026 | Sicilian Defense: Najdorf Variation | |
| Apr 8, 2026 | Mattenberger | 1–0 | Asllani | Round 9: Mattenberger, Matthias - Asllani, Dorian | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 7, 2026 | Arsenie | 0–1 | Mattenberger | Round 8: Arsenie, Cristian Marc - Mattenberger, Matthias | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Apr 6, 2026 | Mattenberger | 1–0 | Stalmach | Round 7: Mattenberger, Matthias - Stalmach, Richard | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 5, 2026 | Shatil | ½–½ | Mattenberger | Round 6: Shatil, Or - Mattenberger, Matthias | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Apr 4, 2026 | Mattenberger | 1–0 | Collin | Round 5: Mattenberger, Matthias - Collin, Moritz Valentin | Sicilian Defense: Delayed Alapin Variation | |
| Apr 3, 2026 | Lamaze | 1–0 | Mattenberger | Round 4: Lamaze, Simon - Mattenberger, Matthias | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Apr 2, 2026 | Mattenberger | ½–½ | Roebers | Round 3: Mattenberger, Matthias - Roebers, Eline | King's Indian Defense: Semi-Averbakh System | |
| Mar 31, 2026 | Ermitsch | 1–0 | Mattenberger | Round 1: Ermitsch, Magnus - Mattenberger, Matthias | Sicilian Defense: Najdorf Variation | |
| Mar 17, 2026 | Mattenberger | 1–0 | Fischer | SUI-chT Luzern-Reti | Nimzo-Indian Defense: Normal Variation | |
| Feb 18, 2026 | Manko | ½–½ | Mattenberger | Round 2: Manko, Mariia - Mattenberger, Matthias | Slav Defense: Modern Line | |
| Feb 17, 2026 | Mattenberger | 0–1 | Ben Ari | Round 6: Mattenberger, Matthias - Ben Ari, Yannay | Nimzo-Indian Defense: Normal Variation | |
| Feb 16, 2026 | Mattenberger | 0–1 | Suder | Round 4: Mattenberger, Matthias - Suder, Jakub | Sicilian Defense: Alapin Variation | |
| Feb 15, 2026 | Jirasek | ½–½ | Mattenberger | Round 3: Jirasek, Pavel - Mattenberger, Matthias | Réti Opening: Anglo-Slav Variation, with g3 | |
| Dec 30, 2025 | Trost | ½–½ | Mattenberger | Round 4: Trost, Edvin - Mattenberger, Matthias | King's Indian Attack: Symmetrical Defense | |
| Nov 7, 2025 | Soderstrom | ½–½ | Mattenberger | Round 9: Soderstrom, Adrian - Mattenberger, Matthias | Slav Defense: Czech Variation, Classical System, Main Line | |
| Nov 2, 2025 | Erten | 1–0 | Mattenberger | Round 5: Erten, Kerem - Mattenberger, Matthias | Sicilian Defense: Modern Variations | |
| Nov 1, 2025 | Mattenberger | 0–1 | Piliposyan | Round 4: Mattenberger, Matthias - Piliposyan, Robert | Semi-Slav Defense: Botvinnik Variation | |
| Oct 31, 2025 | Smeets | 0–1 | Mattenberger | Round 3: Smeets, Kobe - Mattenberger, Matthias | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Oct 29, 2025 | Kvaloy | ½–½ | Mattenberger | Round 1: Kvaloy, Aksel Bu - Mattenberger, Matthias | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Sep 28, 2025 | Mattenberger | ½–½ | Peng | SMM Rd 8+9 | Benko Gambit Accepted: Fully Accepted Variation | |
| Sep 27, 2025 | Mattenberger | 0–1 | Willems | SMM Rd 8+9 | Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation | |
| Jul 20, 2025 | Mattenberger | 0–1 | Bogner | Round 9: Mattenberger, Matthias - Bogner, Sebastian | Nimzo-Indian Defense: Normal Variation | |
| Jul 18, 2025 | Fecker | 1–0 | Mattenberger | Round 7: Fecker, Noah - Mattenberger, Matthias | Sicilian Defense: Moscow Variation | |
| Jul 17, 2025 | Mattenberger | 0–1 | Gallagher | Round 6: Mattenberger, Matthias - Gallagher, Joseph G. | King's Indian Defense: Semi-Averbakh System | |
| Jul 16, 2025 | Kurmann | 1–0 | Mattenberger | Round 5: Kurmann, Oliver - Mattenberger, Matthias | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Jul 15, 2025 | Mattenberger | 0–1 | Peng | Round 4: Mattenberger, Matthias - Peng, Li Min | Indian Defense: Anti-Grünfeld, Basman-Williams Attack | |
| Jul 14, 2025 | Gantner | 1–0 | Mattenberger | Round 3: Gantner, Matthias - Mattenberger, Matthias | Sicilian Defense | |
| Jul 13, 2025 | Mattenberger | ½–½ | Gaehwiler | Round 2: Mattenberger, Matthias - Gaehwiler, Gabriel | Queen's Gambit Accepted: Classical Defense, Main Line | |
| Jul 12, 2025 | Fischer | ½–½ | Mattenberger | Round 1: Fischer, Daniel - Mattenberger, Matthias | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| May 28, 2025 | Toktomushev | 1–0 | Mattenberger | Round 8: Toktomushev, Teimur - Mattenberger, Matthias | Slav Defense | |
| Apr 27, 2025 | Mattenberger | ½–½ | Georgiadis | SUI-chT Tribschen-Riehen | Queen's Gambit Accepted: Normal Variation, Traditional System | |
| Apr 26, 2025 | Fecker | ½–½ | Mattenberger | Round 9: Fecker, Noah - Mattenberger, Matthias | Sicilian Defense: Chekhover Variation | |
| Apr 25, 2025 | Mattenberger | 0–1 | Boyer | Round 8: Mattenberger, Matthias - Boyer, Mahel | Queen's Gambit Declined: Queen's Knight Variation | |
| Apr 24, 2025 | Vlachos | 1–0 | Mattenberger | Round 7: Vlachos, Anatole - Mattenberger, Matthias | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Apr 23, 2025 | Mattenberger | 1–0 | Krastev | Round 6: Mattenberger, Matthias - Krastev, Alexander | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | |
| Apr 22, 2025 | Manko | ½–½ | Mattenberger | Round 5: Manko, Mariia - Mattenberger, Matthias | Neo-Grünfeld Defense: Classical Variation, Modern Defense | |
| Apr 21, 2025 | Mattenberger | 0–1 | Collin | Round 4: Mattenberger, Matthias - Collin, Moritz Valentin | Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation | |
| Apr 20, 2025 | Mattenberger | 0–1 | Peyrer | Round 3: Mattenberger, Matthias - Peyrer, Konstantin | Indian Defense: Anti-Grünfeld, Basman-Williams Attack | |
| Apr 19, 2025 | Schlegel | 0–1 | Mattenberger | Round 2: Schlegel, Igor - Mattenberger, Matthias | Sicilian Defense: O'Kelly Variation, Maróczy Bind | |
| Apr 18, 2025 | Mattenberger | ½–½ | Hryzlova | Round 1: Mattenberger, Matthias - Hryzlova, Sofiia | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 6, 2025 | Mattenberger | ½–½ | Baenziger | SUI-chT Tribschen-Luzern | Nimzo-Indian Defense: Normal Variation | |
| Apr 5, 2025 | Mattenberger | 0–1 | Bauer | SUI-chT Tribschen-Zuerich | Queen's Pawn Game: Modern Defense | |
| Jan 5, 2025 | Mattenberger | 1–0 | Johansson | 52nd Rilton Cup | Nimzo-Indian Defense: Rubinstein System | |
| Jan 3, 2025 | Olsson | 1–0 | Mattenberger | 52nd Rilton Cup | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Jan 2, 2025 | Mattenberger | ½–½ | Sorensen | 52nd Rilton Cup | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 31, 2024 | Trost | ½–½ | Mattenberger | 52nd Rilton Cup | Sicilian Defense: Modern Variations | |
| Dec 30, 2024 | Mattenberger | 1–0 | Wong | 52nd Rilton Cup | Semi-Slav Defense: Marshall Gambit, Forgotten Variation | |
| Oct 13, 2024 | Mattenberger | ½–½ | Kuehn | SMM Nationalliga A 2024 | Queen's Gambit Declined: Austrian Defense | |
| Oct 12, 2024 | Prusikin | 0–1 | Mattenberger | SMM Nationalliga A 2024 | East Indian Defense | |
| Aug 31, 2024 | Arnold | ½–½ | Mattenberger | EYCC 2024 - O16 | Sicilian Defense: Najdorf Variation, English Attack | |
| Aug 30, 2024 | Mattenberger | 1–0 | Kassios | EYCC 2024 - O16 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Aug 29, 2024 | Lyakh | ½–½ | Mattenberger | EYCC 2024 - O16 | Neo-Grünfeld Defense: Goglidze Attack | |
| Aug 23, 2024 | Mattenberger | 0–1 | Hartofylakas | EYCC 2024 - O16 | Nimzo-Indian Defense: St. Petersburg Variation, American Variation | |
| Jul 20, 2024 | Gupta | 1–0 | Mattenberger | Round 1: Gupta, Abhijeet - Mattenberger, Matthias | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Jun 21, 2024 | Mattenberger | ½–½ | Levin | Round 1: Mattenberger, Matthias - Levin, Guy | Queen's Gambit Accepted: Winawer Defense | |
| May 26, 2024 | Mattenberger | ½–½ | Kurmann | SUI-chT Schwarz-Weiss Bern-Luzern | Nimzo-Indian Defense: Normal Variation | |
| May 20, 2024 | Guyer | 0–1 | Mattenberger | Schweizer Jugend Einzelmeisterschaft 2024 | Sicilian Defense: Najdorf Variation, English Attack | |
| May 19, 2024 | Mattenberger | ½–½ | Malli | Schweizer Jugend Einzelmeisterschaft 2024 | Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation | |
| May 19, 2024 | Rappazzo | ½–½ | Mattenberger | Schweizer Jugend Einzelmeisterschaft 2024 | Sicilian Defense: Najdorf Variation, English Attack | |
| May 18, 2024 | Mattenberger | 1–0 | Breyer | Schweizer Jugend Einzelmeisterschaft 2024 | Nimzo-Indian Defense: Reshevsky Variation | |
| May 18, 2024 | Toktomushev | ½–½ | Mattenberger | Schweizer Jugend Einzelmeisterschaft 2024 | Neo-Grünfeld Defense: Goglidze Attack | |
| May 17, 2024 | Mattenberger | 1–0 | Gade | Schweizer Jugend Einzelmeisterschaft 2024 | Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation | |
| May 17, 2024 | Gut | ½–½ | Mattenberger | Schweizer Jugend Einzelmeisterschaft 2024 | King's Indian Attack | |
| Apr 28, 2024 | Stojanovic | 1–0 | Mattenberger | SUI-chT Reti-Schwarz-Weiss Bern | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Apr 14, 2024 | Mattenberger | 1–0 | Pelletier | SUI-chT Schwarz-Weiss Bern-Zuerich | Nimzo-Indian Defense: Normal Variation | |
| Mar 10, 2024 | Mattenberger | ½–½ | Benitah | SUI-chT Schwarz-Weiss Bern-Geneve | Slav Defense: Czech Variation, Bled Attack | |
| Nov 23, 2023 | Adury | 1–0 | Mattenberger | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Sicilian Defense: Najdorf Variation, English Attack | |
| Nov 22, 2023 | Mattenberger | ½–½ | Altynbekuly | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Semi-Slav Defense | |
| Nov 21, 2023 | Bayantas | 1–0 | Mattenberger | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Neo-Grünfeld Defense: Exchange Variation | |
| Nov 20, 2023 | Mattenberger | 1–0 | Botea | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Nimzo-Indian Defense: Normal Variation | |
| Nov 18, 2023 | Budyi | ½–½ | Mattenberger | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Grünfeld Defense: Exchange Variation | |
| Nov 17, 2023 | Mattenberger | 0–1 | Ciric | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Queen's Gambit Accepted: Janowski-Larsen Variation | |
| Nov 16, 2023 | Macias Pino | 1–0 | Mattenberger | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Nov 15, 2023 | Mattenberger | 1–0 | Perets | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Pterodactyl Defense: Eastern, Benoni | |
| Nov 14, 2023 | Candian | ½–½ | Mattenberger | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Sicilian Defense: Chekhover Variation | |
| Nov 13, 2023 | Mattenberger | 1–0 | Pusara | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Open 16 | Queen's Gambit Declined: Charousek Variation | |
| Jul 11, 2022 | Kempe | 1–0 | Mattenberger | 41st St. Veit Jacques Lemans Open | Grünfeld Defense: Exchange Variation, Classical Variation | |
| Jul 10, 2022 | Mattenberger | 0–1 | Mitscherling | 41. St. Veiter Jacques-Lemans-Open 2022 | Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation | |
| Sep 14, 2021 | Soham Das | 1–0 | Mattenberger | 1st Int. Swiss Masters Baden-Baden | Indian Defense | |
| Sep 13, 2021 | Mattenberger | 0–1 | Koellner | 1st Int. Swiss Masters Baden-Baden | Rat Defense: English Rat | |
| Sep 13, 2021 | Koellner | 1–0 | Mattenberger | 1st Int. Swiss Masters Baden-Baden | Trompowsky Attack | |
| Sep 12, 2021 | Mattenberger | ½–½ | Sereda | 1st Int. Swiss Masters Baden-Baden | Indian Defense: Anti-Grünfeld, Basman-Williams Attack | |
| Sep 11, 2021 | Mattenberger | 0–1 | Pfatteicher | 1st Int. Swiss Masters Baden-Baden | Old Indian Defense: Ukrainian Variation | |
| Sep 11, 2021 | von Mettenheim | 1–0 | Mattenberger | 1st Int. Swiss Masters Baden-Baden | Grünfeld Defense: Exchange Variation | |
| Sep 10, 2021 | Mattenberger | 0–1 | Gut | 1st Int. Swiss Masters Baden-Baden | Grünfeld Defense: Exchange Variation | |
| Sep 10, 2021 | Hommer | 1–0 | Mattenberger | 1st Int. Swiss Masters Baden-Baden | Hungarian Opening: Indian Defense | |
| Sep 9, 2021 | Morgunov | 1–0 | Mattenberger | 1st Int. Swiss Masters Baden-Baden | Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation | |
| Aug 11, 2021 | Mattenberger | 1–0 | Marocco | World Youth Cup 2021 O14-G14 - Open 14 | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Aug 11, 2021 | Mattenberger | 1–0 | Veny | World Youth Cup 2021 O14-G14 - Open 14 | Nimzo-Indian Defense: Simagin Variation | |