| Aug 29, 2020 | Manuel Ramirez Garrastacho | ½–½ | Isak Sjoberg | Offerspill Nordic Invitational – Round 9: Manuel Ramirez Garrastacho - Isak Sjoberg | King's Indian Defense: Averbakh Variation, Benoni Defense, Advance Variation | |
| Aug 28, 2020 | Isak Sjoberg | ½–½ | Lara Janzelj | Offerspill Nordic Invitational – Round 8: Isak Sjoberg - Lara Janzelj | Philidor Defense: Lion Variation | |
| Aug 26, 2020 | Isak Sjoberg | ½–½ | Rune Djurhuus | Offerspill Nordic Invitational – Round 6: Isak Sjoberg - Rune Djurhuus | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Aug 25, 2020 | Francesco Sonis | 1–0 | Isak Sjoberg | Offerspill Nordic Invitational – Round 5: Francesco Sonis - Isak Sjoberg | Nimzo-Indian Defense: Romanishin Variation | |
| Aug 24, 2020 | Isak Sjoberg | ½–½ | Linus Johansson | Offerspill Nordic Invitational – Round 4: Isak Sjoberg - Linus Johansson | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Aug 21, 2020 | Jonas Buhl Bjerre | 1–0 | Isak Sjoberg | Offerspill Nordic Invitational – Round 1: Jonas Buhl Bjerre - Isak Sjoberg | King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense | |
| Jul 10, 2020 | Isak Sjoberg | 0–1 | Mathias Unneland | Stavanger Chess Challenge – Round 9: Isak Sjoberg - Mathias Unneland | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Jul 9, 2020 | Gunnar Lund | 1–0 | Isak Sjoberg | Stavanger Chess Challenge – Round 8: Gunnar Lund - Isak Sjoberg | Ruy Lopez: Closed, Martinez Variation | |
| Jul 8, 2020 | Isak Sjoberg | 0–1 | Benjamin Arvola Notkevich | Stavanger Chess Challenge – Round 7: Isak Sjoberg - Benjamin Arvola Notkevich | Sicilian Defense: Four Knights Variation | |
| Jul 7, 2020 | Noam Aviv Vitenberg | 0–1 | Isak Sjoberg | Stavanger Chess Challenge – Round 6: Noam Aviv Vitenberg - Isak Sjoberg | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Jul 7, 2020 | Sondre Lillestol Melaa | ½–½ | Isak Sjoberg | Stavanger Chess Challenge – Round 4: Sondre Lillestol Melaa - Isak Sjoberg | Sicilian Defense: Moscow Variation | |
| Jul 7, 2020 | Isak Sjoberg | 1–0 | Sander Fuglestein | Stavanger Chess Challenge – Round 5: Isak Sjoberg - Sander Fuglestein | Caro-Kann Defense: Tartakower Variation | |
| Jul 5, 2020 | Isak Sjoberg | ½–½ | Jens E Ingebretsen | Stavanger Chess Challenge – Round 3: Isak Sjoberg - Jens E Ingebretsen | French Defense: Tarrasch Variation | |
| Jul 5, 2020 | Johannes Haug | 1–0 | Isak Sjoberg | Stavanger Chess Challenge – Round 2: Johannes Haug - Isak Sjoberg | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Jul 4, 2020 | Isak Sjoberg | 1–0 | Sergey Eliseev | Stavanger Chess Challenge – Round 1: Isak Sjoberg - Sergey Eliseev | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 18, 2020 | Isak Sjoberg | 1–0 | Aksel Bu Kvaloy | Offerspill Invitational – Round 9: Isak Sjoberg - Aksel Bu Kvaloy | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 16, 2020 | Mads Vestby-Ellingsen | 0–1 | Isak Sjoberg | Offerspill Invitational – Round 7: Mads Vestby-Ellingsen - Isak Sjoberg | King's Indian Attack: Symmetrical Defense | |
| Jun 15, 2020 | Isak Sjoberg | 0–1 | Sebastian Mihajlov | Offerspill Invitational – Round 6: Isak Sjoberg - Sebastian Mihajlov | French Defense: Tarrasch Variation, Closed Variation | |
| Jun 14, 2020 | Lucas Ranaldi | 0–1 | Isak Sjoberg | Offerspill Invitational – Round 5: Lucas Ranaldi - Isak Sjoberg | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Jun 12, 2020 | Isak Sjoberg | 0–1 | Isak Storme | Offerspill Invitational – Round 2 (clone): Isak Sjoberg - Isak Storme | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 11, 2020 | Kristian Stuvik Holm | 1–0 | Isak Sjoberg | Offerspill Invitational – Round 1 (clone): Kristian Stuvik Holm - Isak Sjoberg | Trompowsky Attack | |
| Jun 10, 2020 | Isak Sjoberg | 1–0 | Rune Djurhuus | Offerspill Invitational: Isak Sjoberg - Rune Djurhuus | French Defense: Tarrasch Variation, Morozevich Variation | |
| Jan 26, 2020 | Isak Sjoberg | 0–1 | Jacob Templen Grave | Offerspill Grand Prix 2020 - Round 7: Isak Sjoberg - Jacob Templen Grave | Caro-Kann Defense: Classical Variation | |
| Jan 26, 2020 | Max Dahl | ½–½ | Isak Sjoberg | Offerspill Grand Prix 2020 - Round 6: Max Dahl - Isak Sjoberg | King's Indian Defense: Normal Variation, King's Knight Variation | |