| May 25, 2026 | Vroombout | * | Becx | Round 7: Vroombout, Enrico - Becx, Cesar | ? | |
| May 25, 2026 | Becx | * | Tabak | Round 6: Becx, Cesar - Tabak, Stefan | ? | |
| May 24, 2026 | De Mon | * | Becx | Round 5: De Mon, Gino - Becx, Cesar | ? | |
| May 24, 2026 | Mueer | * | Becx | Round 4: Mueer, Sebastian - Becx, Cesar | ? | |
| May 23, 2026 | Becx | * | De Block | Round 3: Becx, Cesar - De Block, Fabio | ? | |
| May 23, 2026 | Goossens | * | Becx | Round 2: Goossens, Hanne - Becx, Cesar | ? | |
| May 22, 2026 | Becx | * | Perkampus | Round 1: Becx, Cesar - Perkampus, Laurin | ? | |
| May 10, 2026 | Becx | 0–1 | Grooten | Ronde 6: Becx, Cesar - Grooten, Herman | Bird Opening: Dutch Variation | |
| May 10, 2026 | Zecha | 1–0 | Becx | Ronde 5: Zecha, Oscar - Becx, Cesar | Ruy Lopez: Bird Variation | |
| May 9, 2026 | Becx | 1–0 | Pathak | Ronde 4: Becx, Cesar - Pathak, Raghav | Bird Opening | |
| May 9, 2026 | Johan Wuijts | ½–½ | César Becx | Ronde 3: Johan Wuijts - César Becx | Dutch Defense: Queen's Knight Variation | |
| May 9, 2026 | César Becx | ½–½ | Aishwin Daniel | Ronde 2: César Becx - Aishwin Daniel | Bird Opening | |
| May 8, 2026 | Bas Van Doren | ½–½ | César Becx | Round 1: Bas Van Doren - César Becx | Scotch Game: Mieses Variation | |
| Feb 20, 2026 | Becx | 0–1 | Pijpers | Round 1: Becx, Cesar - Pijpers, Arthur | Bird Opening: Dutch Variation | |
| Feb 14, 2026 | Hinrichs | 1–0 | Becx | 5. Int. Baden-Badener Faschingsopen | Dutch Defense: Hopton Attack | |
| Jul 20, 2025 | Arman | 1–0 | Becx | Round 3: Arman, Deniz - Becx, Cesar | Dutch Defense: Staunton Gambit, Chigorin Variation | |
| May 18, 2025 | Verhoeven | ½–½ | Becx | Round 6: Verhoeven, Lars - Becx, Cesar | English Opening: Anglo-Dutch Defense | |
| May 18, 2025 | Becx | 1–0 | Glasbeek | Round 5: Becx, Cesar - Glasbeek, Steven | Bird Opening | |
| May 17, 2025 | Kurt | 1–0 | Becx | Round 4: Kurt, Sascha - Becx, Cesar | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 17, 2025 | Becx | 1–0 | Winkels | Round 3: Becx, Cesar - Winkels, Marcel | Bird Opening | |
| May 17, 2025 | Beerdsen | 1–0 | Becx | Round 2: Beerdsen, Thomas - Becx, Cesar | Scotch Game: Scotch Gambit, Advance Variation | |
| May 16, 2025 | Becx | 1–0 | Bruggeman | Round 1: Becx, Cesar - Bruggeman, David | Bird Opening | |
| May 15, 2025 | Smits | ½–½ | Becx | KNSB Meesterklasse 2024-2025 | Vienna Game | |
| Dec 14, 2024 | Becx | 0–1 | Van Foreest | KNSB | Bird Opening: Dutch Variation | |
| Jul 22, 2024 | Roos | 1–0 | Becx | Round 5: Roos, David - Becx, Cesar | Ruy Lopez: Cozio Defense | |
| Jul 21, 2024 | Dauw | 1–0 | Becx | Round 3: Dauw, Sterre - Becx, Cesar | Ponziani Opening: Steinitz Variation | |
| Jun 23, 2024 | Becx | 0–1 | Gijsen | Round 6: Becx, Cesar - Gijsen, William | Bird Opening: Dutch Variation | |
| Jun 21, 2024 | Becx | 0–1 | Stefansson | Round 1: Becx, Cesar - Stefansson, Vignir Vatnar | Bird Opening: Dutch Variation | |
| Jun 2, 2024 | Becx | ½–½ | Kshirsagar | WLC Tournament 2024 A | Bird Opening: Dutch Variation | |
| Jun 2, 2024 | Baselmans | 1–0 | Becx | WLC Tournament 2024 A | Italian Game: Anti-Fried Liver Defense | |
| Jun 1, 2024 | Becx | ½–½ | Miltenburg | WLC Tournament 2024 A | Bird Opening: Dutch Variation | |
| Jun 1, 2024 | Becx | ½–½ | Bollen | WLC Tournament 2024 A | Bird Opening: Dutch Variation | |
| Jun 1, 2024 | Quintus | 0–1 | Becx | WLC Tournament 2024 A | Dutch Defense: Raphael Variation | |
| May 31, 2024 | Matthijssen | ½–½ | Becx | WLC Tournament 2024 A | ? | |
| Jun 24, 2023 | Torsten Limbach | ½–½ | Cesar Becx | Round 4: Torsten Limbach - Cesar Becx | Dutch Defense: Leningrad Variation, Matulovic Variation | |
| Jun 23, 2023 | Duncan Klaren | 1–0 | Cesar Becx | Round 2: Duncan Klaren - Cesar Becx | Dutch Defense | |
| May 28, 2023 | Becx | * | Campora Perez | Limburg Open | ? | |
| May 28, 2023 | Swijsen | * | Becx | Limburg Open | ? | |
| Jul 22, 2022 | Cesar Becx | 0–1 | Andrii Palchuk | Round 6: Cesar Becx - Andrii Palchuk | Bird Opening: Dutch Variation | |
| Jul 21, 2022 | Cesar Becx | 0–1 | Gabriel Flom | Round 4: Cesar Becx - Gabriel Flom | Bird Opening | |
| Jul 21, 2022 | Iwan Bonoo | 0–1 | Cesar Becx | Round 3: Iwan Bonoo - Cesar Becx | Dutch Defense: Leningrad Variation, Matulovic Variation | |
| Jun 19, 2022 | Cesar Becx | ½–½ | Tim Grutter | Round 6: Cesar Becx - Tim Grutter | Bird Opening | |
| Jun 19, 2022 | Vladimir Jashchenko | 0–1 | Cesar Becx | Round 5: Vladimir Jashchenko - Cesar Becx | Center Game: Hall Variation | |
| Jun 18, 2022 | Cesar Becx | 0–1 | Machteld Van Foreest | Round 4: Cesar Becx - Machteld Van Foreest | Bird Opening: Dutch Variation | |
| Jun 18, 2022 | Mark Bloem | 0–1 | Cesar Becx | Round 3: Mark Bloem - Cesar Becx | Ruy Lopez: Schliemann Defense | |
| Mar 27, 2022 | Cesar Becx | 1–0 | Peter Cafolla | Round 5: Cesar Becx - Peter Cafolla | Bird Opening | |
| Mar 27, 2022 | Oissine Murchadha | 1–0 | Cesar Becx | Round 4: Oissine Murchadha - Cesar Becx | Nimzo-Larsen Attack: Dutch Variation | |
| Mar 26, 2022 | Cesar Becx | 1–0 | Antonina Gora | Round 3: Cesar Becx - Antonina Gora | Bird Opening: Dutch Variation | |
| Mar 26, 2022 | Thibault Real | 1–0 | Cesar Becx | Round 2: Thibault Real - Cesar Becx | Dutch Defense: Staunton Gambit, Chigorin Variation | |
| Mar 25, 2022 | Cesar Becx | 0–1 | Matej Hrabusa | Round 1: Cesar Becx - Matej Hrabusa | Bird Opening: Dutch Variation | |
| Sep 12, 2021 | Benjamin Murray | 0–1 | Cesar Becx | Round 5: Benjamin Murray - Cesar Becx | Scotch Game: Scotch Gambit, Advance Variation | |
| Sep 12, 2021 | Cesar Becx | 0–1 | Jacob Flynn | Round 4: Cesar Becx - Jacob Flynn | Bird Opening: Dutch Variation | |
| Sep 11, 2021 | Tarun Kanyamarala | 1–0 | Cesar Becx | Round 3: Tarun Kanyamarala - Cesar Becx | Zukertort Opening: Dutch Variation | |
| Sep 11, 2021 | Cesar Becx | 1–0 | Peter O'Driscoll | Round 2: Cesar Becx - Peter O'Driscoll | Bird Opening | |
| Sep 10, 2021 | Stephen Rush | 0–1 | Cesar Becx | Round 1: Stephen Rush - Cesar Becx | Dutch Defense: Classical Variation | |