| Jun 21, 2026 | Beerdsen | 1–0 | Leenen | HSG Open 2026 A | Queen's Gambit Declined | |
| Jun 20, 2026 | Lombaers | ½–½ | Leenen | HSG Open 2026 A | Semi-Slav Defense | |
| Jun 19, 2026 | Leenen | ½–½ | Bagrationi | HSG Open 2026 A | King's Indian Defense: Orthodox Variation | |
| May 25, 2026 | Leenen | ½–½ | Battistelli | Round 7: Leenen, Boyd - Battistelli, Fausto | King's Indian Defense: Orthodox Variation | |
| May 25, 2026 | Gurevich | 1–0 | Leenen | Round 6: Gurevich, Mikhail - Leenen, Boyd | Queen's Gambit Declined: Harrwitz Attack | |
| May 24, 2026 | Leenen | * | Bakija | Round 5: Leenen, Boyd - Bakija, Alan | ? | |
| May 24, 2026 | De Block | ½–½ | Leenen | Round 4: De Block, Fabio - Leenen, Boyd | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 23, 2026 | Leenen | * | Manucharyan | Round 3: Leenen, Boyd - Manucharyan, Andriy | ? | |
| May 23, 2026 | Schroer | * | Leenen | Round 2: Schroer, Marcel - Leenen, Boyd | ? | |
| May 22, 2026 | Leenen | * | Kutzner | Round 1: Leenen, Boyd - Kutzner, Stephen | ? | |
| May 10, 2026 | Westerhof | 0–1 | Leenen | Ronde 6: Westerhof, Fleur - Leenen, Boyd | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 10, 2026 | Leenen | ½–½ | Thijssen | Ronde 5: Leenen, Boyd - Thijssen, Freek | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 9, 2026 | Bhattacharjee | ½–½ | Leenen | Ronde 4: Bhattacharjee, Sourav - Leenen, Boyd | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 9, 2026 | Boyd Leenen | 1–0 | Quinones-Maletti | Ronde 3: Boyd Leenen - Quinones-Maletti, Julio Guillermo | Queen's Indian Defense: Petrosian Variation | |
| May 9, 2026 | Pim Blijlevens | 0–1 | Boyd Leenen | Ronde 2: Pim Blijlevens - Boyd Leenen | Queen's Gambit Declined: Modern Variation, Knight Defense | |
| May 8, 2026 | Boyd Leenen | 0–1 | Nino Messaoudi | Round 1: Boyd Leenen - Nino Messaoudi | Bogo-Indian Defense: Nimzowitsch Variation | |
| May 2, 2026 | Leenen | ½–½ | Van den Doel | Round 9: Leenen, Boyd - Van den Doel, Erik | Semi-Slav Defense: Normal Variation | |
| May 2, 2026 | Van der Looij | 0–1 | Leenen | Round 8: Van der Looij, Rik - Leenen, Boyd | Italian Game: Classical Variation, Giuoco Pianissimo, with a4 a5 | |
| May 2, 2026 | Leenen | 1–0 | Timmer | Round 7: Leenen, Boyd - Timmer, Michel | Bogo-Indian Defense: Wade-Smyslov Variation | |
| May 2, 2026 | Leenen | 0–1 | De Jong | Round 5: Leenen, Boyd - De Jong, Lode | Bogo-Indian Defense: Nimzowitsch Variation | |
| May 2, 2026 | Leenen | 1–0 | Lenting | Round 4: Leenen, Boyd - Lenting, Roan | Queen's Gambit Declined: Exchange Variation, Sämisch Variation | |
| May 2, 2026 | Fridman | 1–0 | Leenen | Round 3: Fridman, Daniel - Leenen, Boyd | Catalan Opening: Closed | |
| May 2, 2026 | Leenen | 1–0 | Koks | Round 1: Leenen, Boyd - Koks, Paul | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 1, 2026 | Gupta | 0–1 | Leenen | Round 6: Gupta, Akul - Leenen, Boyd | Rapport-Jobava System | |
| Apr 30, 2026 | Leenen | 1–0 | Sosef | Round 9: Leenen, Boyd - Sosef, Noah | King's Indian Defense: Orthodox Variation, Ukrainian Defense | |
| Apr 29, 2026 | Teianu | 1–0 | Leenen | Round 8: Teianu, Sabin - Leenen, Boyd | Queen's Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line | |
| Apr 29, 2026 | Leenen | 1–0 | Ozbek | Round 7: Leenen, Boyd - Ozbek, Ahmet Naim | Ruy Lopez: Closed, Keres Defense | |
| Apr 29, 2026 | Leenen | 0–1 | Pathak | Round 6: Leenen, Boyd - Pathak, Raghav | King's Indian Defense: Orthodox Variation, Bayonet Attack | |
| Apr 27, 2026 | Uitermark | 0–1 | Leenen | Round 5: Uitermark, Imre - Leenen, Boyd | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 27, 2026 | Leenen | 1–0 | Zhou | Round 4: Leenen, Boyd - Zhou, Yanyang | Semi-Slav Defense | |
| Apr 27, 2026 | Thijssen | 1–0 | Leenen | Round 3: Thijssen, Freek - Leenen, Boyd | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Apr 12, 2026 | Leenen | ½–½ | Botter | Round 2: Leenen, Boyd - Botter, Simon | Zukertort Opening: Nimzo-Larsen Variation | |
| Apr 12, 2026 | Cubuk | 0–1 | Leenen | Round 1: Cubuk, Armin - Leenen, Boyd | Scotch Game: Scotch Gambit, London Defense | |
| Nov 2, 2025 | Zakin | ½–½ | Leenen | Round 5: Zakin, Ilay - Leenen, Boyd | Ruy Lopez: Closed, Keres Defense | |
| Nov 1, 2025 | Leenen | 0–1 | Radzimski | Round 4: Leenen, Boyd - Radzimski, Antoni | Queen's Gambit Declined: Three Knights Variation | |
| Oct 31, 2025 | Borne | 0–1 | Leenen | Round 3: Borne, Felix - Leenen, Boyd | English Opening: Neo-Catalan | |
| Oct 30, 2025 | Leenen | 1–0 | Besou | Round 2: Leenen, Boyd - Besou, Hussain | Grünfeld Defense: Three Knights Variation, Hungarian Attack | |
| Jul 22, 2025 | Klinova | 1–0 | Leenen | Round 8: Klinova, Masha - Leenen, Boyd | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 21, 2025 | Maerevoet | 1–0 | Leenen | Round 6: Maerevoet, Sim - Leenen, Boyd | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Jul 21, 2025 | Leenen | ½–½ | Knuedel | Round 5: Leenen, Boyd - Knuedel, Torben | Catalan Opening: Closed | |
| Jul 20, 2025 | De Waele | 0–1 | Leenen | Round 4: De Waele, Warre - Leenen, Boyd | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| May 30, 2025 | De Winter | 1–0 | Leenen | Round 1: De Winter, Arthur - Leenen, Boyd | Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack | |
| May 18, 2025 | Leenen | ½–½ | Vennix | Round 6: Leenen, Boyd - Vennix, Tom | Queen's Gambit Accepted | |
| May 18, 2025 | Hubers | 0–1 | Leenen | Round 5: Hubers, Daan - Leenen, Boyd | Catalan Opening: Closed | |
| May 17, 2025 | Winkels | 1–0 | Leenen | Round 4: Winkels, Marcel - Leenen, Boyd | Ruy Lopez: Closed | |
| May 17, 2025 | Leenen | 0–1 | Madularea | Round 3: Leenen, Boyd - Madularea, David | Indian Defense: Döry Indian | |
| May 17, 2025 | Feng | 0–1 | Leenen | Round 2: Feng, Elysia - Leenen, Boyd | Ruy Lopez: Closed, Keres Defense | |
| May 16, 2025 | Leenen | 0–1 | Beerdsen | Round 1: Leenen, Boyd - Beerdsen, Thomas | Queen's Gambit Declined: Ragozin Defense, Alekhine Variation | |
| May 2, 2025 | Leenen | 1–0 | Teianu | Round 9: Leenen, Boyd - Teianu, Sabin | French Defense: Advance Variation, Euwe Variation | |
| May 2, 2025 | Leenen | 1–0 | Thijssen | Round 11: Leenen, Boyd - Thijssen, Freek | Zukertort Opening: Nimzo-Larsen Variation | |
| May 2, 2025 | Leenen | ½–½ | Thijssen | Round 13: Leenen, Boyd - Thijssen, Freek | Zukertort Opening | |
| May 2, 2025 | Leenen | 0–1 | Thijssen | Round 14: Leenen, Boyd - Thijssen, Freek | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |
| May 2, 2025 | Thijssen | 1–0 | Leenen | Round 10: Thijssen, Freek - Leenen, Boyd | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |
| May 2, 2025 | Thijssen | ½–½ | Leenen | Round 12: Thijssen, Freek - Leenen, Boyd | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| May 2, 2025 | Thijssen | * | Leenen | Round 15: Thijssen, Freek - Leenen, Boyd | ? | |
| May 1, 2025 | Aravindhan | 0–1 | Leenen | Round 8: Aravindhan, Achyuth - Leenen, Boyd | Scotch Game: Scotch Gambit, Advance Variation | |
| Apr 30, 2025 | Leenen | ½–½ | Etienne | Round 7: Leenen, Boyd - Etienne, Ghilon | Italian Game: Scotch Gambit, Anderssen Attack | |
| Apr 30, 2025 | Georgopoulos-Karbouniaris | 0–1 | Leenen | Round 6: Georgopoulos-Karbouniaris, Mylo - Leenen, Boyd | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 29, 2025 | Leenen | ½–½ | Dinanath | Round 5: Leenen, Boyd - Dinanath, Hrdya | Sicilian Defense: Najdorf Variation | |
| Apr 28, 2025 | Leenen | ½–½ | Thijssen | Round 4: Leenen, Boyd - Thijssen, Freek | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Apr 28, 2025 | Katpatal | ½–½ | Leenen | Round 3: Katpatal, Akshaj - Leenen, Boyd | English Opening: Caro-Kann Defensive System | |
| Apr 27, 2025 | Leenen | ½–½ | Roebers | Round 2: Leenen, Boyd - Roebers, Bregje | King's Indian Defense: Sämisch Variation, Sämisch Gambit | |
| Apr 26, 2025 | Yantur | 0–1 | Leenen | Round 1: Yantur, Arda - Leenen, Boyd | Vienna Game: Paulsen Variation | |
| Aug 26, 2024 | Leenen | ½–½ | Nezhyvenko | EYCC 2024 - O12 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Aug 25, 2024 | Nguyen | ½–½ | Leenen | EYCC 2024 - O12 | Catalan Opening: Closed | |
| Aug 23, 2024 | Ambartsumian | 1–0 | Leenen | EYCC 2024 - O12 | Ruy Lopez: Closed | |
| Aug 20, 2024 | Leenen | 1–0 | Sakharchuk | EYCC 2024 Blitz O12 | Trompowsky Attack | |
| Aug 20, 2024 | Leenen | ½–½ | Krstic | EYCC 2024 Blitz O12 | Trompowsky Attack | |
| Aug 20, 2024 | Leenen | ½–½ | Hallmundarson | EYCC 2024 Blitz O12 | Nimzo-Indian Defense: Kmoch Variation | |
| Aug 20, 2024 | Leenen | 1–0 | MOLCHANOV | EYCC 2024 Blitz O12 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Aug 20, 2024 | Leenen | 1–0 | Matiievskyi | EYCC 2024 Blitz O12 | English Opening: King's English Variation, Two Knights Variation, Keres Variation | |
| Aug 20, 2024 | Leenen | 1–0 | Velychko | EYCC 2024 Blitz O12 | English Opening: King's English Variation, Two Knights Variation, Keres Variation | |
| Aug 20, 2024 | Sakharchuk | 1–0 | Leenen | EYCC 2024 Blitz O12 | Four Knights Game: Italian Variation | |
| Aug 20, 2024 | Krstic | 0–1 | Leenen | EYCC 2024 Blitz O12 | Vienna Gambit, with Max Lange Defense | |
| Aug 20, 2024 | Hallmundarson | 0–1 | Leenen | EYCC 2024 Blitz O12 | English Opening: Symmetrical Variation | |
| Aug 20, 2024 | MOLCHANOV | ½–½ | Leenen | EYCC 2024 Blitz O12 | Italian Game: Scotch Gambit, Anderssen Attack | |
| Aug 20, 2024 | Matiievskyi | 1–0 | Leenen | EYCC 2024 Blitz O12 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Aug 20, 2024 | Velychko | 0–1 | Leenen | EYCC 2024 Blitz O12 | Rapport-Jobava System | |
| Aug 19, 2024 | Leenen | ½–½ | Ivashchenko | EYCC 2024 Blitz O12 | King's Indian Defense: Sämisch Variation, Yates Defense | |
| Aug 19, 2024 | Leenen | 1–0 | Bilochenko | EYCC 2024 Blitz O12 | Trompowsky Attack | |
| Aug 19, 2024 | Leenen | 0–1 | Pavlyk | EYCC 2024 Blitz O12 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Aug 19, 2024 | Ivashchenko | 0–1 | Leenen | EYCC 2024 Blitz O12 | Italian Game: Evans Gambit, Pierce Defense | |
| Aug 19, 2024 | Bilochenko | 0–1 | Leenen | EYCC 2024 Blitz O12 | Ruy Lopez: Closed, Borisenko Variation | |
| Aug 19, 2024 | Pavlyk | ½–½ | Leenen | EYCC 2024 Blitz O12 | King's Gambit Accepted: King's Knight's Gambit | |
| Aug 18, 2024 | Leenen | 0–1 | Tretiak | EYCC 2024 Rapid O12 | Queen's Gambit Accepted: Central Variation, McDonnell Defense | |
| Aug 18, 2024 | Toledo | 0–1 | Leenen | EYCC 2024 Rapid O12 | Scotch Game: Potter Variation | |
| Aug 18, 2024 | Sniedziewski | 1–0 | Leenen | EYCC 2024 Rapid O12 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Aug 17, 2024 | Leenen | 1–0 | Nieminen | EYCC 2024 Rapid O12 | King's Indian Defense: Sämisch Variation, Byrne Defense | |
| Aug 17, 2024 | Leenen | ½–½ | Hanache | EYCC 2024 Rapid O12 | Trompowsky Attack | |
| Aug 17, 2024 | Leenen | 0–1 | Pavlyk | EYCC 2024 Rapid O12 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Aug 17, 2024 | Bilochenko | 0–1 | Leenen | EYCC 2024 Rapid O12 | Ruy Lopez: Closed, Borisenko Variation | |
| Aug 17, 2024 | Molchanov | ½–½ | Leenen | EYCC 2024 Rapid O12 | Italian Game: Scotch Gambit, Anderssen Attack | |
| Jun 20, 2024 | Matthieu 2012: Guillaumond | 0–1 | Leenen | Round 4: Matthieu 2012: Guillaumond - Leenen, Boyd | Petrov's Defense: Italian Variation | |
| Jun 16, 2024 | Thao 2012: Luong | 1–0 | Leenen | Round 6: Thao 2012: Luong - Leenen, Boyd | Zukertort Opening: Tennison Gambit | |
| Jun 16, 2024 | Kshirsagar | 0–1 | Leenen | Round 2: Kshirsagar, Parth - Leenen, Boyd | Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line | |
| Jun 16, 2024 | Leenen | 1–0 | Pranay Kumar Sreepadi | Round 1: Leenen, Boyd - Pranay Kumar Sreepadi | Semi-Slav Defense | |
| Jun 15, 2024 | Leenen | 1–0 | Grooten | Round 9: Leenen, Boyd - Grooten, Herman | Queen's Indian Defense: Kasparov Variation | |
| Jun 15, 2024 | Panjer | 0–1 | Leenen | Round 8: Panjer, Sidney - Leenen, Boyd | Queen's Indian Defense: Fianchetto Variation, Rubinstein Variation | |
| Jun 15, 2024 | Leenen | 1–0 | Katpatal | Round 7: Leenen, Boyd - Katpatal, Akshaj | King's Indian Defense: Sämisch Variation, Normal Defense | |
| Jun 15, 2024 | Van Batenburg | 1–0 | Leenen | Round 6: Van Batenburg, Mees - Leenen, Boyd | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |