| Jun 7, 2026 | Reimer | 0–1 | Bogomolow | Round 5: Reimer, Philip - Bogomolow, Sergej | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Jun 7, 2026 | Reimer | 1–0 | Brinkers | Round 4: Reimer, Philip - Brinkers, Niklas | Philidor Defense: Lion Variation | |
| Jun 6, 2026 | Wittje | 1–0 | Reimer | Round 3: Wittje, Berthold - Reimer, Philip | King's Indian Attack | |
| Jun 6, 2026 | Reimer | ½–½ | Rick | Round 2: Reimer, Philip - Rick, Uwe | Sicilian Defense: O'Kelly Variation, Venice System | |
| Jun 5, 2026 | Krueger | 0–1 | Reimer | Round 1: Krueger, Stefan - Reimer, Philip | Nimzo-Indian Defense: Normal Variation | |
| Mar 31, 2026 | Akhmatovski | 1–0 | Reimer | Runde 9: Akhmatovski, Maxim - Reimer, Philip | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Mar 31, 2026 | Reimer | * | Vollbehr | Runde 8: Reimer, Philip - Vollbehr, Bjarne | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Mar 30, 2026 | Gerlach | 0–1 | Reimer | Runde 7: Gerlach, Felix - Reimer, Philip | King's Indian Attack | |
| Mar 27, 2026 | Reimer | 0–1 | Koellner | Runde 2: Reimer, Philip - Koellner, Ruben Gideon | Ruy Lopez: Classical Variation | |
| Jan 5, 2026 | Plischki | ½–½ | Reimer | Runde 7: Plischki, Sebastian - Reimer, Philip | Queen's Gambit Declined: Barmen Variation | |
| Jan 4, 2026 | Reimer | ½–½ | Stelmaszyk | Runde 6: Reimer, Philip - Stelmaszyk, Nico | French Defense: Advance Variation, Lputian Variation | |
| Jan 4, 2026 | Polster | 1–0 | Reimer | Runde 5: Polster, Christian - Reimer, Philip | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jan 3, 2026 | Hampel | ½–½ | Reimer | Runde 4: Hampel, Felix - Reimer, Philip | King's Indian Attack | |
| Jan 3, 2026 | Reimer | 1–0 | Bargsten | Runde 3: Reimer, Philip - Bargsten, Justus | Sicilian Defense: Löwenthal Variation | |
| Jan 2, 2026 | Holtwessels | 0–1 | Reimer | Runde 2: Holtwessels, Jan - Reimer, Philip | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Dec 28, 2025 | Reimer | ½–½ | von Mettenheim | Runde 1: Reimer, Philip - von Mettenheim, Johannes | Ruy Lopez: Cozio Defense | |
| Oct 19, 2025 | Reimer | ½–½ | Lobzhanidze | Runde 2: SK Lehrte - Bremen | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Oct 18, 2025 | Reimer | 0–1 | Hagemann | Round 9: Reimer, Philip - Hagemann, Sven | ? | |
| Oct 18, 2025 | Reimer | 0–1 | Stelmaszyk | Round 8: Reimer, Philip - Stelmaszyk, Nico | ? | |
| Oct 18, 2025 | Sviridov | 0–1 | Reimer | Round 7: Sviridov, Vitaliy - Reimer, Philip | ? | |
| Oct 18, 2025 | Seyrek | ½–½ | Reimer | Round 6: Seyrek, Rohat - Reimer, Philip | ? | |
| Oct 18, 2025 | Reimer | 1–0 | Poupard | Round 5: Reimer, Philip - Poupard, Clement | ? | |
| Oct 18, 2025 | Polenz | 1–0 | Reimer | Round 4: Polenz, Fredrik - Reimer, Philip | ? | |
| Oct 18, 2025 | Reimer | 1–0 | Nguyen | Round 3: Reimer, Philip - Nguyen, Phuc Nhat | ? | |
| Oct 18, 2025 | Bangert | 1–0 | Reimer | Round 2: Bangert, Jonas - Reimer, Philip | ? | |
| Oct 18, 2025 | Reimer | 1–0 | Dorr | Round 1: Reimer, Philip - Dorr, Joerg | ? | |
| Jun 1, 2025 | Stelmaszyk | ½–½ | Reimer | Round 7: Stelmaszyk, Nico - Reimer, Philip | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| May 31, 2025 | Reimer | ½–½ | Strache | Round 6: Reimer, Philip - Strache, Michael | French Defense: MacCutcheon Variation, Dr. Olland Variation | |
| May 30, 2025 | Parvanyan | 1–0 | Reimer | Round 3: Parvanyan, Ashot - Reimer, Philip | Tarrasch Defense: Dubov Tarrasch | |
| May 25, 2025 | von Estorff | ½–½ | Reimer | Round 5: von Estorff, Jacob - Reimer, Philip | Sicilian Defense: Old Sicilian | |
| May 25, 2025 | van Son | 0–1 | Reimer | Round 4: van Son, Lutz - Reimer, Philip | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| May 24, 2025 | Reimer | ½–½ | Pienski | Round 3: Reimer, Philip - Pienski, Olaf | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| May 24, 2025 | Baisakow | 1–0 | Reimer | Round 2: Baisakow, Alexander - Reimer, Philip | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| May 23, 2025 | Reimer | 1–0 | Kanzow | Round 1: Reimer, Philip - Kanzow, Alexander | Sicilian Defense: Lasker-Pelikan Variation | |
| Apr 18, 2025 | Reimer | 0–1 | Mohamed Anees M | Round 3: Reimer, Philip - Mohamed Anees M | Sicilian Defense: O'Kelly Variation, Venice System | |
| Jan 5, 2025 | Reimer | ½–½ | Bundan | Round 7: Reimer, Philip - Bundan, Edward | Sicilian Defense: Lasker-Pelikan Variation | |
| Jan 4, 2025 | Reimer | ½–½ | Lebiedz | Round 5: Reimer, Philip - Lebiedz, Oliver | Sicilian Defense: Four Knights Variation | |
| Jan 4, 2025 | Gottschalk | 0–1 | Reimer | Round 6: Gottschalk, Siegfried - Reimer, Philip | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Jan 3, 2025 | Reimer | 0–1 | Moeller | Round 3: Reimer, Philip - Moeller, Jonas | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Jan 3, 2025 | Moerke | 0–1 | Reimer | Round 4: Moerke, Niklas - Reimer, Philip | Nimzo-Indian Defense: Classical Variation | |
| Jan 2, 2025 | Reimer | 1–0 | Seer | Round 1: Reimer, Philip - Seer, Maurice | Italian Game: Classical Variation, Greco Gambit, Anderssen Variation | |
| Jan 2, 2025 | Soellig | ½–½ | Reimer | Round 2: Soellig, Martin - Reimer, Philip | Sicilian Defense: Closed | |
| Jun 9, 2024 | Reimer | 0–1 | Peters | Round 5: Reimer, Philip - Peters, Tom | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Jun 9, 2024 | Bargsten | 0–1 | Reimer | Round 4: Bargsten, Justus - Reimer, Philip | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 8, 2024 | von Mettenheim | ½–½ | Reimer | Round 3: von Mettenheim, Johannes - Reimer, Philip | Queen's Pawn Game: Colle System | |
| Jun 8, 2024 | Reimer | 1–0 | Stotyn | Round 2: Reimer, Philip - Stotyn, Fabian | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Jun 7, 2024 | Shalovylo | 0–1 | Reimer | Round 1: Shalovylo, Yuriy - Reimer, Philip | Indian Defense: Dzindzi-Indian Defense | |
| Mar 18, 2024 | Reimer | 0–1 | Zhu | Reykjavik Open 2024 | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Mar 15, 2024 | Reimer | 0–1 | Klimkowski | Reykjavik Open 2024 | Caro-Kann Defense: Advance Variation, Short Variation | |
| Dec 7, 2024 | Reimer | 1–0 | Jendryschik | Round 1: Reimer, Philip - Jendryschik, Lina | Caro-Kann Defense: Advance Variation, Short Variation | |
| Dec 7, 2024 | Reimer | 1–0 | Lichtmannecker | Round 3: Reimer, Philip - Lichtmannecker, Daniel | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Dec 7, 2024 | Reimer | 1–0 | Lippert | Round 5: Reimer, Philip - Lippert, Daniel | Sicilian Defense: Classical Variation | |
| Dec 7, 2024 | Reimer | 0–1 | Wagner | Round 7: Reimer, Philip - Wagner, Benjamin | Italian Game: Classical Variation, Greco Gambit | |
| Dec 7, 2024 | Tamas Toth | 0–1 | Reimer | Round 2: Tamas Toth - Reimer, Philip | Sicilian Defense: Old Sicilian | |
| Dec 7, 2024 | Hourigan | 1–0 | Reimer | Round 4: Hourigan, Gerrit - Reimer, Philip | Queen's Gambit Declined: Three Knights Variation | |
| Dec 7, 2024 | Jan Laakmann | 0–1 | Reimer | Round 6: Jan Laakmann - Reimer, Philip | Nimzo-Indian Defense: Normal Variation, Ragozin Variation | |
| Jan 7, 2023 | Riemay | 1–0 | Reimer | Lower Saxony Championship | Masters | Sicilian Defense: Smith-Morra Gambit Accepted | |
| Jan 7, 2023 | Gentemann | ½–½ | Reimer | Lower Saxony Championship | Masters | Indian Defense: Dzindzi-Indian Defense | |
| Jan 5, 2023 | Reimer | 1–0 | Voege | Lower Saxony Championship | Masters | French Defense: Burn Variation | |
| Jun 11, 2022 | Brockmeyer | 0–1 | Reimer | ODJM A 2022 | Nimzo-Indian Defense: Classical Variation | |
| Jun 10, 2022 | Reimer | 0–1 | Nguyen | ODJM A 2022 | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jun 9, 2022 | Sabirov | 1–0 | Reimer | ODJM A 2022 | Sicilian Defense: Closed, Traditional | |
| Jun 8, 2022 | Reimer | ½–½ | Kracht | ODJM A 2022 | Italian Game: Classical Variation, Greco Gambit | |
| Jun 8, 2022 | Kardoeus | 1–0 | Reimer | ODJM A 2022 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation | |
| Jun 7, 2022 | Reimer | ½–½ | Wensing | ODJM A 2022 | Sicilian Defense: O'Kelly Variation, Venice System, Gambit Line | |
| Jun 6, 2022 | Brinkmann | * | Reimer | ODJM A 2022 | Sicilian Defense: Lasker-Pelikan Variation | |
| Jun 5, 2022 | Reimer | 1–0 | Kotyk | ODJM A 2022 | Modern Defense: Gurgenidze Defense | |
| Jun 27, 2021 | Wu | 1–0 | Reimer | DVM U20 2020 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation | |
| Jun 26, 2021 | Reimer | 1–0 | Hommel | DVM U20 2020 | Sicilian Defense: Richter-Rauzer Variation, Classical Variation | |
| Jun 26, 2021 | Freiherr von Hauff | ½–½ | Reimer | DVM U20 2020 | Sicilian Defense: Old Sicilian | |
| Jun 25, 2021 | Reimer | 0–1 | Bornholdt | DVM U20 2021 | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Jun 25, 2021 | Gorainow | 1–0 | Reimer | DVM U20 2021 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Jun 24, 2021 | Reimer | ½–½ | Fieberg | DVM U20 2021 | Slav Defense: Exchange Variation, Boor Attack | |
| Jun 24, 2021 | Bargsten | ½–½ | Reimer | DVM U20 2021 | Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6 | |