| Jun 30, 2026 | Ernst | ½–½ | Cederstam | Round 4: Ernst, Thomas - Cederstam, Carl | Caro-Kann Defense: Tartakower Variation | |
| Jun 29, 2026 | Ernst | 0–1 | Akesson | Round 3: Ernst, Thomas - Akesson, Ralf | Sicilian Defense: Taimanov Variation, Modern Line | |
| Jun 28, 2026 | Wiedenkeller | ½–½ | Ernst | Round 2: Wiedenkeller, Michael - Ernst, Thomas | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Jun 27, 2026 | Ernst | 1–0 | Olsson | Round 1: Ernst, Thomas - Olsson, Linus | Italian Game: Hungarian Defense | |
| Mar 8, 2026 | Vernersson | 1–0 | Ernst | Rond 9: Vernersson, Per - Ernst, Thomas | Grünfeld Defense: Brinckmann Attack | |
| Mar 7, 2026 | Ernst | 0–1 | Gajic | Rond 8: Ernst, Thomas - Gajic, Mladen | Dutch Defense: Classical Variation, Buenos Aires Variation | |
| Mar 6, 2026 | Ernst | ½–½ | Arman | Rond 7: Ernst, Thomas - Arman, Deniz | Benoni Defense: King's Pawn Line, with Bg5 | |
| Jan 18, 2026 | Ernst | 0–1 | Wernberg | Rond 6: Ernst, Thomas - Wernberg, Hugo | French Defense: Tarrasch Variation, Modern System | |
| Jan 17, 2026 | Ernst | 0–1 | Olund | Rond 5: Ernst, Thomas - Olund, Joar | Ruy Lopez: Berlin Defense, Anti-Berlin Variation | |
| Jan 16, 2026 | Hammer | 1–0 | Ernst | Rond 4: Hammer, Jon Ludvig - Ernst, Thomas | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Dec 29, 2025 | Marttala | 0–1 | Ernst | Open rapid/standard chess tournament 27-30 dec | Queen's Pawn Game: London System | |
| Dec 29, 2025 | Ernst | 1–0 | Rehman | Open rapid/standard chess tournament 27-30 dec | Sicilian Defense: Najdorf Variation | |
| Dec 27, 2025 | Ernst | ½–½ | Nome | Open rapid/standard chess tournament 27-30 dec | Caro-Kann Defense: Tartakower Variation | |
| Dec 27, 2025 | Nordahl | 0–1 | Ernst | Open rapid/standard chess tournament 27-30 dec | Sicilian Defense: Scheveningen Variation, Keres Attack | |
| Nov 30, 2025 | Ernst | 1–0 | Janse | Rond 3: Ernst, Thomas - Janse, Love | French Defense: Winawer Variation, Classical Variation | |
| Nov 29, 2025 | Ernst | 1–0 | Lindgren | Rond 2: Ernst, Thomas - Lindgren, Philip | Caro-Kann Defense: Tartakower Variation | |
| Nov 28, 2025 | Sjodahl | ½–½ | Ernst | Rond 1: Sjodahl, Pontus - Ernst, Thomas | Grünfeld Defense: Brinckmann Attack | |
| Aug 12, 2025 | Falkevall | 1–0 | Ernst | Uppsala Chess Festival IM | Italian Game: Scotch Gambit, Max Lange Attack | |
| Jul 31, 2025 | Banerjee | 0–1 | Ernst | Jonkoping Chess Festival 2025 - Rapid Open | King's Indian Defense: Fianchetto Variation, Panno Variation, Donner Line | |
| Jul 31, 2025 | Ernst | ½–½ | Krantz | Jonkoping Chess Festival 2025 - Rapid Open | French Defense: Tarrasch Variation, Closed Variation, Main Line | |
| Jul 31, 2025 | Eriksson | 0–1 | Ernst | Jonkoping Chess Festival 2025 - Rapid Open | King's Indian Defense: Fianchetto Variation, Carlsbad Variation | |
| Jul 31, 2025 | Ernst | 0–1 | Ezeldeen Almaaqbeh | Jonkoping Chess Festival 2025 - Rapid Open | Caro-Kann Defense: Tartakower Variation | |
| Jul 31, 2025 | Abdel Munem Abu Hazeem | ½–½ | Ernst | Jonkoping Chess Festival 2025 - Rapid Open | Zukertort Opening: Sicilian Invitation | |
| Jul 31, 2025 | Ernst | 1–0 | Berling | Jonkoping Chess Festival 2025 - Rapid Open | Caro-Kann Defense: Tartakower Variation | |
| Jul 31, 2025 | Abdulla Ateeq Alremaeithi | 0–1 | Ernst | Jonkoping Chess Festival 2025 - Rapid Open | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Jul 31, 2025 | Ernst | ½–½ | Ezeldeen Almaaqbeh | Jonkoping Chess Festival 2025 - Standard Open | King's Indian Defense: Sämisch Variation | |
| Jul 30, 2025 | Poley | 1–0 | Ernst | Jonkoping Chess Festival 2025 - Standard Open | Zukertort Opening: Sicilian Invitation | |
| Jul 29, 2025 | Ernst | ½–½ | Kowalczyk | Jonkoping Chess Festival 2025 - Standard Open | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jul 28, 2025 | Blomqvist | 1–0 | Ernst | Jonkoping Chess Festival 2025 - Standard Open | Ruy Lopez: Open | |
| Jul 28, 2025 | Ernst | 1–0 | Loay | Jonkoping Chess Festival 2025 - Standard Open | King's Indian Defense: Orthodox Variation, Glek Defense | |
| Jul 27, 2025 | Ask | 0–1 | Ernst | Jonkoping Chess Festival 2025 - Standard Open | Center Game: Ross Gambit | |
| Jul 26, 2025 | Ernst | 1–0 | Bergdahl | Jonkoping Chess Festival 2025 - Standard Open | Caro-Kann Defense: Tartakower Variation | |
| Jul 25, 2025 | Stenvaag | 0–1 | Ernst | Jonkoping Chess Festival 2025 - Standard Open | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Apr 21, 2025 | Ernst | ½–½ | Cederstam | The Paskturneringen 2025 | Ruy Lopez: Marshall Attack | |
| Apr 20, 2025 | Nygren | 0–1 | Ernst | The Paskturneringen 2025 | Ruy Lopez: Morphy Defense, Mackenzie Variation | |
| Apr 18, 2025 | Ernst | 0–1 | Duke | The Paskturneringen 2025 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Apr 18, 2025 | Karlsson | 0–1 | Ernst | The Paskturneringen 2025 | Sicilian Defense: Closed | |
| Mar 9, 2025 | Ernst | ½–½ | Akesson | The Superettan 2024/25: round 7 - 9 | French Defense: Rubinstein Variation, Fort Knox Variation | |
| Feb 9, 2025 | Ernst | 1–0 | Karlsson | Elite Hotels Open 2025 | King's Indian Defense: Sämisch Variation, Sämisch Gambit | |
| Feb 9, 2025 | Trost | 1–0 | Ernst | Elite Hotels Open 2025 | Ruy Lopez: Open, St. Petersburg Variation | |
| Feb 8, 2025 | Ernst | 0–1 | Falkevall | Elite Hotels Open 2025 | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Feb 8, 2025 | Schriever-Abeln | 0–1 | Ernst | Elite Hotels Open 2025 | Benoni Defense | |
| Feb 7, 2025 | Ernst | 1–0 | Madevan Vaishnavi | Elite Hotels Open 2025 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Feb 7, 2025 | Ernst | 1–0 | Fransson | Elite Hotels Open 2025 | French Defense: Tarrasch Variation, Closed Variation, Main Line | |
| Feb 7, 2025 | Ekberg | 0–1 | Ernst | Elite Hotels Open 2025 | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Feb 7, 2025 | Johansson | 0–1 | Ernst | Elite Hotels Open 2025 | Sicilian Defense: Kramnik Variation | |
| Dec 15, 2024 | Hald Falkesgaard | 1–0 | Ernst | Malmo Open 2024 | English Opening: King's English Variation | |
| Dec 14, 2024 | Ernst | 0–1 | Smith | Malmo Open 2024 | Sicilian Defense: Four Knights Variation, Cobra Variation | |
| Dec 13, 2024 | Hillarp Persson | 0–1 | Ernst | Malmo Open 2024 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Sep 8, 2024 | Muntean | 0–1 | Ernst | The Kvibergspelen 2024 | ? | |
| Sep 8, 2024 | Kucuksari | ½–½ | Ernst | The Kvibergspelen 2024 | Catalan Opening: Open Defense, Modern Sharp Variation | |
| Sep 7, 2024 | Ernst | 1–0 | Wahlstrom | The Kvibergspelen 2024 | Queen's Gambit Declined: Austrian Defense | |
| Sep 7, 2024 | Ernst | 0–1 | Lindberg | The Kvibergspelen 2024 | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | |
| Sep 6, 2024 | Ernst | ½–½ | Simpson | The Kvibergspelen 2024 | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Sep 6, 2024 | Ernst | 1–0 | Olsson | The Kvibergspelen 2024 | Benko Gambit Accepted: Fully Accepted Variation | |
| Sep 6, 2024 | Krilovs | 0–1 | Ernst | The Kvibergspelen 2024 | Ruy Lopez: Open, St. Petersburg Variation | |
| Dec 28, 2023 | Ernst | ½–½ | Kallen | Karlstad Open 2023 | Ruy Lopez: Marshall Attack, Modern Main Line | |
| Dec 28, 2023 | Aamodt | 0–1 | Ernst | Karlstad Open 2023 | Sicilian Defense: Scheveningen Variation, Keres Attack | |
| Dec 27, 2023 | Ernst | 1–0 | Svanholm | Karlstad Open 2023 | Caro-Kann Defense: Tartakower Variation | |
| Dec 27, 2023 | Ernst | 0–1 | Muntean | Karlstad Open 2023 | Ruy Lopez: Morphy Defense, Schliemann Defense Deferred | |
| Dec 27, 2023 | Rukovci | 0–1 | Ernst | Karlstad Open 2023 | Sicilian Defense: Kan Variation, Knight Variation | |
| Jul 9, 2023 | Hector | 0–1 | Ernst | Schack-SM 2023: Sverigemastarklassen | Scotch Game: Mieses Variation | |
| Jul 8, 2023 | Ernst | ½–½ | Olsson | Schack-SM 2023: Sverigemastarklassen | Italian Game: Classical Variation, Greco Gambit, Anderssen Variation | |
| Jul 7, 2023 | Seo | 1–0 | Ernst | Schack-SM 2023: Sverigemastarklassen | Indian Defense: Anti-Grünfeld, Basman-Williams Attack | |
| Jul 6, 2023 | Ernst | ½–½ | Johansson | Schack-SM 2023: Sverigemastarklassen | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Jul 5, 2023 | Kucuksari | 0–1 | Ernst | Schack-SM 2023: Sverigemastarklassen | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Jul 4, 2023 | Ernst | ½–½ | Sivuk | Schack-SM 2023: Sverigemastarklassen | Sicilian Defense: Najdorf Variation | |
| Jul 3, 2023 | Hillarp Persson | 0–1 | Ernst | Schack-SM 2023: Sverigemastarklassen | Sicilian Defense: Chekhover Variation | |
| Jul 2, 2023 | Ernst | ½–½ | Pantzar | Schack-SM 2023: Sverigemastarklassen | Caro-Kann Defense: Tartakower Variation | |
| Jul 1, 2023 | Ernst | 0–1 | Blomqvist | Schack-SM 2023: Sverigemastarklassen | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Feb 19, 2023 | Ernst | ½–½ | Andersson | Vastgota Open 2023 | Queen's Gambit Declined: Lasker Defense, Main Line | |
| Feb 19, 2023 | Wengholm | 0–1 | Ernst | Vastgota Open 2023 | English Opening: Symmetrical Variation, Three Knights Variation | |
| Feb 18, 2023 | Ernst | 1–0 | Sundqvist | Vastgota Open 2023 | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Feb 18, 2023 | Ernst | 1–0 | Muntean | Vastgota Open 2023 | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Feb 18, 2023 | Bjorkman | ½–½ | Ernst | Vastgota Open 2023 | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| Feb 18, 2023 | Rasti | 1–0 | Ernst | Vastgota Open 2023 | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| Feb 18, 2023 | Lind | 1–0 | Ernst | Vastgota Open 2023 | Scotch Game: Göring Gambit, Main Line | |
| Feb 12, 2023 | Ernst | 1–0 | Mashhadi | Elite Hotels Open 2023 | French Defense: Classical Variation, Steinitz Variation | |
| Feb 11, 2023 | Ernst | 0–1 | Strom-Engdahl | Elite Hotels Open 2023 | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Feb 11, 2023 | Neretljak | ½–½ | Ernst | Elite Hotels Open 2023 | Sicilian Defense: Wing Gambit | |
| Feb 10, 2023 | Ernst | 1–0 | Ravik | Elite Hotels Open 2023 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Feb 10, 2023 | Ernst | 0–1 | Falkevall | Elite Hotels Open 2023 | Ruy Lopez: Marshall Attack, Modern Main Line | |
| Feb 10, 2023 | Ottosson | 0–1 | Ernst | Elite Hotels Open 2023 | English Opening: Symmetrical Variation, Three Knights Variation | |
| Feb 10, 2023 | Odell Johansson | 0–1 | Ernst | Elite Hotels Open 2023 | Queen's Pawn Game: Barry Attack | |
| Jul 11, 2021 | Ernst | 1–0 | Thorn | Swedish Chess Championship 2021: Mastarklassen-Elit | Caro-Kann Defense: Tartakower Variation | |
| Jul 10, 2021 | Sorensen | 1–0 | Ernst | Swedish Chess Championship 2021: Mastarklassen-Elit | Slav Defense: Geller Gambit | |
| Jul 9, 2021 | Ernst | ½–½ | Zadruzny | Swedish Chess Championship 2021: Mastarklassen-Elit | Ruy Lopez: Berlin Defense | |
| Jul 8, 2021 | Lindberg | 1–0 | Ernst | Swedish Chess Championship 2021: Mastarklassen-Elit | French Defense: Winawer Variation, Advance Variation | |
| Jul 7, 2021 | Furhoff | 1–0 | Ernst | Swedish Chess Championship 2021: Mastarklassen-Elit | King's Gambit Accepted: Cunningham Defense, McCormick Defense | |
| Jul 6, 2021 | Ernst | ½–½ | Johansson | Swedish Chess Championship 2021: Mastarklassen-Elit | French Defense: Rubinstein Variation, Fort Knox Variation | |
| Jul 5, 2021 | Bellon Lopez | ½–½ | Ernst | Swedish Chess Championship 2021: Mastarklassen-Elit | Indian Defense | |
| Jul 4, 2021 | Ernst | 1–0 | Jogstad | Swedish Chess Championship 2021: Mastarklassen-Elit | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Jul 3, 2021 | Nikolic | 0–1 | Ernst | Swedish Chess Championship 2021: Mastarklassen-Elit | Benoni Defense: Fianchetto Variation | |
| — | Ernst | 0–1 | Blomqvist | Stockholm GP 2024 | Ruy Lopez: Morphy Defense, Norwegian Variation | |
| — | Ernst | 1–0 | Mortensen | Round 1: Ernst, Thomas - Mortensen, Michael | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| — | Ernst | 1–0 | Ask | Round 3: Ernst, Thomas - Ask, Josef | Indian Defense: Pyrenees Gambit | |
| — | Ernst | ½–½ | Carlsson | Round 5: Ernst, Thomas - Carlsson, Ludvig | Four Knights Game: Spanish Variation, Rubinstein Variation Accepted | |
| — | Ernst | 1–0 | Muntean | Round 7: Ernst, Thomas - Muntean, Victor | Ruy Lopez: Marshall Attack, Main Line, Spassky Variation | |
| — | Ernst | 0–1 | Avinash Ramesh | Round 1: Ernst, Thomas - Avinash Ramesh | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| — | Ernst | 0–1 | Kowalski | Round 2: Ernst, Thomas - Kowalski, Igor | Ruy Lopez: Marshall Attack, Modern Main Line | |