| May 10, 2026 | Thijssen | ½–½ | De Vries | Ronde 6: Thijssen, Freek - De Vries, Leon | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| May 10, 2026 | De Vries | 1–0 | Verhoeven | Ronde 5: De Vries, Leon - Verhoeven, Robin | Zukertort Opening: Sicilian Invitation | |
| May 9, 2026 | Marcel Winkels | 0–1 | Leon De Vries | Ronde 3: Marcel Winkels - Leon De Vries | Sicilian Defense: Lasker-Pelikan Variation | |
| May 9, 2026 | Leon De Vries | ½–½ | Sai Pranav Tejas Lalkota | Ronde 2: Leon De Vries - Sai Pranav Tejas Lalkota | King's Indian Attack: Double Fianchetto | |
| May 8, 2026 | Milan Mostertman | 1–0 | Leon De Vries | Round 1: Milan Mostertman - Leon De Vries | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| May 18, 2025 | De Vries | 0–1 | Madularea | Round 6: De Vries, Leon - Madularea, David | Zukertort Opening: Queen's Gambit Invitation | |
| May 18, 2025 | Smits | ½–½ | De Vries | Round 5: Smits, Sebastiaan - De Vries, Leon | Sicilian Defense | |
| May 17, 2025 | De Vries | 1–0 | De Vries | Round 4: De Vries, Leon - De Vries, Emma | King's Indian Attack: Symmetrical Defense | |
| May 17, 2025 | Vos | 1–0 | De Vries | Round 3: Vos, Tjark - De Vries, Leon | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| May 17, 2025 | De Vries | ½–½ | Panjer | Round 2: De Vries, Leon - Panjer, Sidney | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| May 16, 2025 | Quintus | 0–1 | De Vries | Round 1: Quintus, Max - De Vries, Leon | Zukertort Opening: Sicilian Invitation | |
| Jun 1, 2024 | De Vries | 0–1 | Dubbeldam | WLC Tournament 2024 A | ? | |
| Jun 1, 2024 | De Vries | ½–½ | Bye | WLC Tournament 2024 A | ? | |
| Jun 1, 2024 | Sazonov | 1–0 | De Vries | WLC Tournament 2024 A | Grünfeld Defense: Three Knights Variation, Petrosian System | |
| May 31, 2024 | De Vries | 0–1 | Lee | WLC Tournament 2024 A | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Mar 30, 2024 | De Vries | * | Liefrink | Round 5: De Vries, Leon - Liefrink, Feike | ? | |
| Mar 30, 2024 | Oranje | * | De Vries | Round 3: Oranje, Richard - De Vries, Leon | ? | |
| Mar 30, 2024 | De Vries | ½–½ | Kumar | Round 1: De Vries, Leon - Kumar, Prajit Sai | King's Indian Attack | |
| Mar 29, 2024 | Bulthuis | * | De Vries | Round 2: Bulthuis, Jelle - De Vries, Leon | ? | |
| Nov 9, 2023 | Natan Pirard | 1–0 | Leon De Vries | Leuven Open 2023 Round 1: Player 9 - Player 10 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit | |
| Aug 6, 2023 | Jan Lueersen | 1–0 | Leon De Vries | Round 8: Jan Lueersen - Leon De Vries | King's Pawn Game | |
| Aug 5, 2023 | Leon De Vries | 0–1 | Jan-Hendrik Bahr | Round 7: Leon De Vries - Jan-Hendrik Bahr | King's Indian Attack | |
| Aug 5, 2023 | Julian Doenitz | 0–1 | Leon De Vries | Round 6: Julian Doenitz - Leon De Vries | English Opening: King's English Variation | |
| Aug 4, 2023 | Leon De Vries | ½–½ | Juergen Siol | Round 5: Leon De Vries - Juergen Siol | Zukertort Opening: Sicilian Invitation | |
| Aug 3, 2023 | Luka Xue | 1–0 | Leon De Vries | Round 3: Luka Xue - Leon De Vries | Neo-Grünfeld Defense: Goglidze Attack | |
