| Apr 11, 2026 | De Jong | ½–½ | Van Batenburg | Round 9: De Jong, Jan-Willem - Van Batenburg, Mees | Dutch Defense: Classical Variation, Huisl Variation | |
| Mar 28, 2026 | Van Foreest | ½–½ | De Jong | Round 6: Van Foreest, Machteld - De Jong, Jan-Willem | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 8, 2026 | Burg | ½–½ | De Jong | KNSB competitie 2025/2026 | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Feb 7, 2026 | Sprangers | 0–1 | De Jong | Round 7: Sprangers, Remco - De Jong, Jan-Willem | Scotch Game: Mieses Variation | |
| Nov 22, 2025 | De Jong | ½–½ | Kerigan | Round 4: De Jong, Jan-Willem - Kerigan, Demre | King's Indian Defense: Normal Variation, Rare Defenses | |
| Nov 7, 2025 | De Jong | ½–½ | Zwirs | KNSB competitie 2025/2026 | Queen's Gambit Declined: Barmen Variation | |
| Oct 25, 2025 | Kobo | ½–½ | De Jong | Round 7: Kobo, Ori - De Jong, Jan-Willem | King's Indian Attack: Double Fianchetto | |
| Oct 24, 2025 | De Jong | ½–½ | Eggleston | Round 6: De Jong, Jan-Willem - Eggleston, David J | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Oct 23, 2025 | Duijn | ½–½ | De Jong | Round 5: Duijn, Richard - De Jong, Jan-Willem | Slav Defense: Modern Line | |
| Oct 22, 2025 | Durak | 1–0 | De Jong | Round 4: Durak, Can - De Jong, Jan-Willem | King's Indian Attack | |
| Oct 21, 2025 | De Jong | ½–½ | Nogerbek | Round 3: De Jong, Jan-Willem - Nogerbek, Kazybek | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 19, 2025 | De Jong | 0–1 | Cordts | Round 1: De Jong, Jan-Willem - Cordts, Ingo | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Oct 4, 2025 | De Jong | 1–0 | Baltic | Round 2: De Jong, Jan-Willem - Baltic, Fatih | Modern Defense: Kotov Variation | |
| Sep 20, 2025 | Grutter | ½–½ | De Jong | Round 1: Grutter, Tim - De Jong, Jan-Willem | Ruy Lopez: Exchange Variation, King's Bishop Variation | |
| May 13, 2025 | De Jong | 1–0 | Aravindhan | Round 9: De Jong, Jan-Willem - Aravindhan, Achyuth | King's Indian Defense: Semi-Averbakh System | |
| Apr 5, 2025 | Van Meegen | 1–0 | De Jong | Round 8: Van Meegen, Ruud - De Jong, Jan-Willem | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Mar 8, 2025 | De Boer | ½–½ | De Jong | Round 7: De Boer, Eelke - De Jong, Jan-Willem | Ruy Lopez: Open, Main Line | |
| Feb 8, 2025 | Geirnaert | ½–½ | De Jong | Round 6: Geirnaert, Steven - De Jong, Jan-Willem | Slav Defense | |
| Nov 23, 2024 | De Jong | 0–1 | Van Roon | KNSB Meesterklasse 2024-2025 | Slav Defense: Quiet Variation | |
| Oct 24, 2024 | De Jong | 1–0 | Filipovic | 39th European Chess Club Cup | Tarrasch Defense: Schara Gambit | |
| Oct 23, 2024 | Kjoita | 0–1 | De Jong | 39th European Chess Club Cup | Rapport-Jobava System | |
| Oct 22, 2024 | Uruci | 0–1 | De Jong | 39th European Chess Club Cup | Italian Game: Scotch Gambit, Max Lange Attack | |
| Oct 20, 2024 | Olsen | 0–1 | De Jong | 39th European Chess Club Cup | Semi-Slav Defense: Chigorin Defense | |
| Oct 15, 2024 | Hommerson | 0–1 | De Jong | Round 2: Hommerson, Paul - De Jong, Jan-Willem | Slav Defense: Modern Line | |
| Sep 21, 2024 | Van Beek | ½–½ | De Jong | Round 1: Van Beek, Lucien - De Jong, Jan-Willem | Slav Defense | |
| Dec 14, 2024 | Grutter | ½–½ | De Jong | Round 5: Grutter, Tim - De Jong, Jan-Willem | Ruy Lopez: Open | |
| Nov 9, 2024 | De Jong | 1–0 | Piceu | Round 3: De Jong, Jan-Willem - Piceu, Tom | King's Indian Defense: Orthodox Variation, Positional Defense | |
| Oct 26, 2024 | De Jong | 1–0 | Stocek | Round 7: De Jong, Jan-Willem - Stocek, Jiri | Nimzo-Indian Defense: Classical Variation | |
| Oct 21, 2024 | De Jong | 0–1 | Mamedyarov | Round 2: De Jong, Jan-Willem - Mamedyarov, Shakhriyar | Queen's Gambit Declined: Harrwitz Attack, Main Line | |
| Oct 6, 2023 | De Jong | ½–½ | Ondersteijn | European Chess Club Cup 2023 | King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System | |
| Oct 3, 2023 | De Jong | 0–1 | Carnicelli | European Chess Club Cup 2023 | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Oct 1, 2023 | De Jong | 1–0 | Cahen | European Chess Club Cup 2023 | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |