| Apr 11, 2026 | Guemues | 1–0 | Geib | Round 8: Guemues, Enes - Geib, Niklas | Scandinavian Defense: Main Line | |
| Apr 10, 2026 | Geib | 1–0 | Bandholz | Round 7: Geib, Niklas - Bandholz, Jonas | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Apr 9, 2026 | Geib | ½–½ | Zimmermann | LJEM SH 2026 - U16 | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Apr 9, 2026 | Zimmermann | 0–1 | Geib | LJEM SH 2026 - U16 | Scandinavian Defense: Mieses-Kotroc Variation | |
| Apr 8, 2026 | Willers | 1–0 | Geib | Round 4: Willers, Henrik - Geib, Niklas | Slav Defense | |
| Apr 7, 2026 | Geib | 0–1 | Rinow | Round 3: Geib, Niklas - Rinow, Maximilian | Queen's Pawn Game: Chigorin Variation | |
| Apr 7, 2026 | Hellenbroich | 1–0 | Geib | Round 2: Hellenbroich, Hanno - Geib, Niklas | Scotch Game: Scotch Gambit | |
| Apr 6, 2026 | Geib | 1–0 | Weimar | LJEM SH 2026 - U16 | Queen's Pawn Game: Zukertort Variation | |
| Jan 5, 2026 | Geib | 0–1 | Shalovylo | Runde 7: Geib, Niklas - Shalovylo, Matwij | Queen's Pawn Game: London System | |
| Jan 4, 2026 | Gniffke | ½–½ | Geib | Runde 6: Gniffke, Reiner - Geib, Niklas | English Opening: Caro-Kann Defensive System | |
| Jan 4, 2026 | Nordhorn | 0–1 | Geib | Runde 5: Nordhorn, Horst - Geib, Niklas | Queen's Pawn Game: Colle System, Anti-Colle | |
| Jan 3, 2026 | Geib | 1–0 | Warns | Runde 4: Geib, Niklas - Warns, Harald | Queen's Pawn Game: London System | |
| Jan 3, 2026 | Weist | ½–½ | Geib | Runde 3: Weist, Hartmut - Geib, Niklas | Scotch Game: Lolli Variation | |
| Jan 2, 2026 | Geib | * | Hengst | Runde 2: Geib, Niklas - Hengst, Ruediger | ? | |
| Jan 2, 2026 | Ramme | ½–½ | Geib | Runde 1: Ramme, Georg - Geib, Niklas | Queen's Pawn Game: London System | |
| Nov 1, 2025 | Burdielov | 1–0 | Geib | Runde 7: Burdielov, Illia - Geib, Niklas | Italian Game: Two Knights Defense, Fried Liver Attack | |
| Nov 1, 2025 | Geib | 1–0 | Wessels | Runde 6: Geib, Niklas - Wessels, Finn Jarne | Old Indian Defense | |
| Nov 1, 2025 | Neumann | 1–0 | Geib | Runde 5: Neumann, Mattis - Geib, Niklas | Italian Game: Scotch Gambit, Walbrodt-Baird Gambit | |
| Oct 31, 2025 | Geib | 0–1 | Scherdin | Runde 4: Geib, Niklas - Scherdin, Jamie | Englund Gambit: Hartlaub-Charlick Gambit | |
| Oct 31, 2025 | Koerber | 1–0 | Geib | Runde 3: Koerber, Uwe - Geib, Niklas | Scandinavian Defense: Main Line | |
| Oct 30, 2025 | Geib | 1–0 | van der Wateren | Runde 2: Geib, Niklas - van der Wateren, Peter | Queen's Pawn Game: Colle System | |
| Oct 30, 2025 | Witte | 1–0 | Geib | Runde 1: Witte, Volker, Dr. - Geib, Niklas | Slav Defense: Exchange Variation | |
| Jun 14, 2025 | Geib | 0–1 | Krannich | ODJM B 2025 | London System | |
| Jun 13, 2025 | Hesse | 1–0 | Geib | ODJM B 2025 | Scandinavian Defense: Main Line | |
| Jun 12, 2025 | Geib | ½–½ | Salim | ODJM B 2025 | East Indian Defense | |
| Jun 11, 2025 | Stelter | 1–0 | Geib | ODJM B 2025 | Scandinavian Defense: Main Line | |
| Jun 11, 2025 | Geib | ½–½ | Claussen | ODJM B 2025 | Dutch Defense | |
| Jun 10, 2025 | Rotaermel | 0–1 | Geib | ODJM B 2025 | Scandinavian Defense: Main Line | |
| Jun 9, 2025 | Geib | 1–0 | Asmussen | ODJM B 2025 | Queen's Pawn Game: Zukertort Variation | |
| Jun 8, 2025 | Jakob | 1–0 | Geib | ODJM B 2025 | Nimzo-Larsen Attack: Classical Variation | |
| Jun 8, 2025 | Geib | 0–1 | Ihle | ODJM B 2025 | London System | |
| Apr 17, 2025 | Geib | 1–0 | Johannsen | Landesjugendeinzelmeisterschaft SH 2025 | Queen's Pawn Game: Zukertort Variation | |
| Apr 16, 2025 | Finn Wachruschew | 1–0 | Geib | Runde 9: Finn Wachruschew - Geib, Niklas | Scandinavian Defense: Main Line | |
| Apr 16, 2025 | Geib | 0–1 | Krueger | Runde 8: Geib, Niklas - Krueger, Tom | Queen's Pawn Game: Chigorin Variation | |
| Apr 16, 2025 | Christiansen | 0–1 | Geib | Runde 7: Christiansen, Lea-Maileen - Geib, Niklas | Scandinavian Defense: Main Line | |
| Apr 16, 2025 | Geib | 0–1 | Priemer | Runde 6: Geib, Niklas - Priemer, Soeren Gregor | Indian Defense: London System | |
| Apr 16, 2025 | Schmidt | 1–0 | Geib | Runde 5: Schmidt, Daniel - Geib, Niklas | Slav Defense: Modern Line | |
| Apr 16, 2025 | Geib | 1–0 | Erik Fiete Meinke | Runde 4: Geib, Niklas - Erik Fiete Meinke | Queen's Pawn Game: London System | |
| Apr 16, 2025 | Kurschis | ½–½ | Geib | Runde 3: Kurschis, Anton - Geib, Niklas | Slav Defense | |
| Apr 16, 2025 | Geib | 0–1 | Manz | Runde 2: Geib, Niklas - Manz, Lukas | Queen's Pawn Game: London System | |
| Apr 16, 2025 | Jonas Kreutzberger | 0–1 | Geib | Runde 1: Jonas Kreutzberger - Geib, Niklas | Caro-Kann Defense | |
| Apr 16, 2025 | Geib | 0–1 | Hellenbroich | Landesjugendeinzelmeisterschaft SH 2025 | London System | |
| Apr 16, 2025 | Striebeck | 1–0 | Geib | Landesjugendeinzelmeisterschaft SH 2025 | Nimzowitsch Defense: Scandinavian Variation, Advance Variation | |
| Apr 15, 2025 | Kutz | 1–0 | Geib | Runde 4: Kutz, Ida Klara - Geib, Niklas | King's Indian Attack | |
| Apr 14, 2025 | Marmuta | ½–½ | Geib | Runde 3: Marmuta, Anton - Geib, Niklas | Ruy Lopez: Cozio Defense | |
| Apr 14, 2025 | Geib | 1–0 | Driller | Landesjugendeinzelmeisterschaft SH 2025 | Queen's Pawn Game: Chigorin Variation | |
| Apr 13, 2025 | Wendt | 1–0 | Geib | Runde 1: Wendt, Felix - Geib, Niklas | Ruy Lopez: Cozio Defense | |
| May 12, 2024 | Kircheis | 0–1 | Geib | 3. Itzehoer Schach Open (37-58) | Italian Game: Giuoco Pianissimo | |
| May 11, 2024 | Geib | 0–1 | Bredereck | 3. Itzehoer Schach Open (37-58) | Queen's Pawn Game: London System | |
| May 11, 2024 | Dmitriy Pavlov | 1–0 | Geib | 3. Itzehoer Schach Open (37-58) | Italian Game: Deutz Gambit | |
| May 10, 2024 | Geib | 0–1 | Heimbrodt | 3. Itzehoer Schach Open | Queen's Pawn Game: London System | |
| May 10, 2024 | Christiansen | ½–½ | Geib | 3. Itzehoer Schach Open (37-58) | King's Indian Attack | |
| May 9, 2024 | Geib | 0–1 | Mandelkow | 3. Itzehoer Schach Open | London System | |
| May 9, 2024 | Ackermann | 0–1 | Geib | 3. Itzehoer Schach Open (37-58) | Vienna Game: Max Lange Defense | |
| Nov 3, 2024 | Geib | 1–0 | Greiner | Round 7: Geib, Niklas - Greiner, Jan Oluf | Queen's Pawn Game: London System | |
| Nov 2, 2024 | Geib | 0–1 | Neumann | Round 5: Geib, Niklas - Neumann, Hannes | London System | |
| Nov 2, 2024 | Kompe | 1–0 | Geib | Round 6: Kompe, Joerg - Geib, Niklas | Queen's Pawn Game: Zukertort Variation | |
| Nov 1, 2024 | Geib | 1–0 | Janssen | Round 3: Geib, Niklas - Janssen, Soeren | Queen's Pawn Game: London System | |
| Nov 1, 2024 | Lauenstein | 0–1 | Geib | Round 4: Lauenstein, Nico - Geib, Niklas | Italian Game: Anti-Fried Liver Defense | |
| Oct 31, 2024 | Geib | 1–0 | Kleemann | Round 1: Geib, Niklas - Kleemann, Karl | London System | |
| Oct 31, 2024 | Wilmink | 1–0 | Geib | Round 2: Wilmink, Luca - Geib, Niklas | Scotch Game: Scotch Gambit | |