| Apr 3, 2026 | Buergener | 0–1 | Holtwessels | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 2, 2026 | Holtwessels | 1–0 | Haverlandt | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Apr 1, 2026 | Holtwessels | 1–0 | Haustein | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | King's Indian Attack: Sicilian Variation | |
| Mar 30, 2026 | Freimuth | 0–1 | Holtwessels | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | English Opening: King's English Variation, Four Knights Variation, Quiet Line | |
| Mar 29, 2026 | Holtwessels | 1–0 | Schmidt | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Caro-Kann Defense: Exchange Variation | |
| Mar 28, 2026 | Klages | 0–1 | Holtwessels | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Sicilian Defense: Dragon Variation, Classical Variation | |
| Mar 27, 2026 | Schoene | 1–0 | Holtwessels | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Rapport-Jobava System | |
| Mar 27, 2026 | Bangert | ½–½ | Holtwessels | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Tarrasch Defense: Classical Variation, Advance Variation | |
| Mar 27, 2026 | Holtwessels | ½–½ | Muendoerfer | Landesjugendeinzelmeisterschaft in Niedersachsen U16 | Caro-Kann Defense: Advance Variation, Van der Wiel Attack | |
| Jan 5, 2026 | Kieselbach | 1–0 | Holtwessels | Runde 7: Kieselbach, Marvin - Holtwessels, Jan | Ruy Lopez: Closed, Morphy Attack | |
| Jan 4, 2026 | Holtwessels | 0–1 | Tonndorf | Runde 6: Holtwessels, Jan - Tonndorf, Matthias | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jan 4, 2026 | Scheffner | 0–1 | Holtwessels | Runde 5: Scheffner, Jarno - Holtwessels, Jan | Ruy Lopez: Fianchetto Defense | |
| Jan 3, 2026 | Holtwessels | 0–1 | Stelmaszyk | Runde 4: Holtwessels, Jan - Stelmaszyk, Nico | Pirc Defense: Kholmov System | |
| Jan 3, 2026 | Sieber | 0–1 | Holtwessels | Runde 3: Sieber, Bert - Holtwessels, Jan | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| Jan 2, 2026 | Holtwessels | 0–1 | Reimer | Runde 2: Holtwessels, Jan - Reimer, Philip | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jan 2, 2026 | Polster | ½–½ | Holtwessels | Runde 1: Polster, Christian - Holtwessels, Jan | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 25, 2025 | Rennkamp | ½–½ | Holtwessels | Round 5: Rennkamp, Johannes - Holtwessels, Jan | Queen's Pawn Game: Colle System | |
| May 25, 2025 | Holtwessels | ½–½ | Bogomolow | Round 4: Holtwessels, Jan - Bogomolow, Sergej | French Defense: Winawer Variation | |
| May 24, 2025 | Sammann | 0–1 | Holtwessels | Round 3: Sammann, Anton - Holtwessels, Jan | Sicilian Defense: Smith-Morra Gambit Accepted, Classical Formation | |
| May 24, 2025 | Holtwessels | 1–0 | Thieu | Round 2: Holtwessels, Jan - Thieu, Nguyen Gia Bao | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| May 23, 2025 | Hoke | 0–1 | Holtwessels | Round 1: Hoke, Adrian - Holtwessels, Jan | Ruy Lopez: Fianchetto Defense | |
| Apr 18, 2025 | Schaper | 0–1 | Holtwessels | Runde 9: Schaper, Kai - Holtwessels, Jan | Sicilian Defense: Dragon Variation | |
| Apr 16, 2025 | Holtwessels | 1–0 | Direk | Runde 7: Holtwessels, Jan - Direk, Oguzhan | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Apr 16, 2025 | Alali | 0–1 | Holtwessels | Runde 6: Alali, Hashem - Holtwessels, Jan | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Apr 15, 2025 | Holtwessels | 1–0 | Rauschel | Runde 5: Holtwessels, Jan - Rauschel, Maximilian | Center Game: Normal Variation | |
| Apr 14, 2025 | Bangert | 1–0 | Holtwessels | Runde 4: Bangert, Jonas - Holtwessels, Jan | Tarrasch Defense: Schara Gambit | |
| Apr 13, 2025 | Holtwessels | 1–0 | Steven | Runde 3: Holtwessels, Jan - Steven, Matthias | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Apr 13, 2025 | Rafael Asmus Leon | 1–0 | Holtwessels | Runde 2: Rafael Asmus Leon - Holtwessels, Jan | Nimzowitsch Defense | |
| Apr 12, 2025 | Holtwessels | 1–0 | Fize | Round 1: Holtwessels, Jan - Fize, Aleksandrs | Sicilian Defense: French Variation | |
| Apr 11, 2025 | Holtwessels | 0–1 | Schoene | Runde 8: Holtwessels, Jan - Schoene, Finn | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jan 5, 2025 | Holtwessels | 1–0 | Monnerjahn | Round 7: Holtwessels, Jan - Monnerjahn, Lukas | Sicilian Defense: Alapin Variation, Stoltz Attack | |
| Jan 4, 2025 | Holtwessels | 1–0 | Boehnke | Round 5: Holtwessels, Jan - Boehnke, Marc | Sicilian Defense: Najdorf Variation | |
| Jan 4, 2025 | Boerma | 1–0 | Holtwessels | Round 6: Boerma, Daniel - Holtwessels, Jan | Nimzowitsch Defense | |
| Jan 3, 2025 | Holtwessels | 0–1 | Aden | Round 3: Holtwessels, Jan - Aden, Meino | French Defense: Alekhine-Chatard Attack | |
| Jan 3, 2025 | Harms | 0–1 | Holtwessels | Round 4: Harms, Friedjof - Holtwessels, Jan | Nimzowitsch Defense: Scandinavian Variation, Advance Variation | |
| Jan 2, 2025 | Holtwessels | 0–1 | Gottschalk | Round 1: Holtwessels, Jan - Gottschalk, Siegfried | French Defense: Winawer Variation, Alekhine-Maróczy Gambit | |
| Jan 2, 2025 | Stein | 0–1 | Holtwessels | Round 2: Stein, Luis - Holtwessels, Jan | Nimzowitsch Defense: Scandinavian Variation, Advance Variation | |
| Jan 7, 2023 | Holtwessels | 0–1 | Fischer | Lower Saxony Championship | C | Scandinavian Defense: Classical Variation | |
| Jan 7, 2023 | Esche | 1–0 | Holtwessels | Lower Saxony Championship | C | Italian Game: Giuoco Piano, Aitken Variation | |
| Jan 5, 2023 | Roll | * | Holtwessels | Lower Saxony Championship | C | ? | |