| May 17, 2026 | Gretzinger | ½–½ | Grabowski | Runde 7: Gretzinger, Maximilian - Grabowski, Joshua | French Defense: Classical Variation | |
| May 16, 2026 | Grabowski | 0–1 | Dehn | Runde 6: Grabowski, Joshua - Dehn, Marcus | Zukertort Opening: Pirc Invitation | |
| May 16, 2026 | Kaiser | ½–½ | Grabowski | Runde 5: Kaiser, Sebastian - Grabowski, Joshua | Queen's Pawn Game: Symmetrical Variation | |
| May 15, 2026 | Grabowski | ½–½ | Henke | Runde 4: Grabowski, Joshua - Henke, Jaron | Zukertort Opening: Nimzo-Larsen Variation | |
| May 15, 2026 | Kutlar | ½–½ | Grabowski | Runde 3: Kutlar, Aras - Grabowski, Joshua | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| May 14, 2026 | Grabowski | ½–½ | Keyser | Runde 2: Grabowski, Joshua - Keyser, Philipp | Zukertort Opening: Nimzo-Larsen Variation | |
| May 14, 2026 | Zimmer | 0–1 | Grabowski | Round 1: Zimmer, Patrick - Grabowski, Joshua | French Defense: Exchange Variation | |
| Dec 30, 2025 | Mertens | 0–1 | Grabowski | DVM U14 2025 | French Defense: Exchange Variation | |
| Dec 29, 2025 | Paffrath | 1–0 | Grabowski | DVM U14 2025 | French Defense: Horwitz Attack, Papa-Ticulat Gambit | |
| Dec 28, 2025 | Schroeder | ½–½ | Grabowski | DVM U14 2025 | French Defense: Exchange Variation | |
| Dec 28, 2025 | Stein | ½–½ | Grabowski | DVM U14 2025 | Réti Opening: Anglo-Slav Variation, Gurevich System | |
| Dec 27, 2025 | Grabowski | 0–1 | Doerner | DVM U14 2025 | Zukertort Opening | |
| Jun 13, 2025 | Grabowski | 0–1 | Juergenpott | ODJM A 2025 | Queen's Pawn Game: London System | |
| Jun 12, 2025 | Arne | 1–0 | Grabowski | ODJM A 2025 | Polish Opening: Bugayev Advance Variation | |
| Jun 11, 2025 | Grabowski | 0–1 | Schulz | ODJM A 2025 | Zukertort Opening: Quiet System | |
| Jun 11, 2025 | Grabowski | 0–1 | Friedhoff | ODJM A 2025 | Benko Gambit Accepted: King Walk Variation | |
| Jun 10, 2025 | Tiedemann | 1–0 | Grabowski | ODJM A 2025 | Caro-Kann Defense: Classical Variation | |
| Jun 9, 2025 | Grabowski | 0–1 | Mueller | ODJM A 2025 | Queen's Pawn Game: Accelerated London System | |
| Jun 8, 2025 | Walz | ½–½ | Grabowski | ODJM A 2025 | Slav Defense: Modern Line | |
| Jun 8, 2025 | Grabowski | ½–½ | Matthes | ODJM A 2025 | Zukertort Opening | |
| Dec 30, 2024 | Hendler | 0–1 | Grabowski | DVM U12 2024 | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Dec 29, 2024 | Grabowski | 1–0 | Tuktamyshev | DVM U12 2024 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Dec 29, 2024 | Bergmann | 0–1 | Grabowski | DVM U12 2024 | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Dec 28, 2024 | Grabowski | 1–0 | Hagn | DVM U12 2024 | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |
| Dec 28, 2024 | Lu | 0–1 | Grabowski | DVM U12 2024 | Slav Defense | |
| Dec 27, 2024 | Grabowski | 1–0 | Satti | DVM U12 2024 | Caro-Kann Defense: Exchange Variation | |
| Dec 27, 2024 | Rudnizki | 0–1 | Grabowski | DVM U12 2024 | French Defense: Burn Variation | |
| May 25, 2024 | Subocz | 0–1 | Grabowski | DEM U12 2024 | French Defense: Exchange Variation | |
| May 24, 2024 | Grabowski | 0–1 | Lanert | DEM U12 2024 | Rapport-Jobava System | |
| May 23, 2024 | Leonhardt | ½–½ | Grabowski | DEM U12 2024 | King's Indian Attack: French Variation | |
| May 22, 2024 | Grabowski | 1–0 | Koenig | DEM U12 2024 | Ruy Lopez: Closed, Pilnik Variation | |
| May 22, 2024 | Noll | 1–0 | Grabowski | DEM U12 2024 | French Defense: Burn Variation | |
| May 21, 2024 | Grabowski | 0–1 | Doeding | DEM U12 2024 | Petrov's Defense: Stafford Gambit | |
| May 20, 2024 | Balashvili | ½–½ | Grabowski | DEM U12 2024 | French Defense: Steiner Variation | |
| May 19, 2024 | Grabowski | 0–1 | Rodriguez Klasen | DEM U12 2024 | Rapport-Jobava System | |
| May 19, 2024 | Zimmer | ½–½ | Grabowski | DEM U12 2024 | French Defense: Exchange Variation | |
| Nov 3, 2024 | Wibmer | 1–0 | Grabowski | Round 7: Wibmer, Michael - Grabowski, Joshua | French Defense: Schlechter Variation | |
| Nov 2, 2024 | Grabowski | 1–0 | Beeck | Round 6: Grabowski, Joshua - Beeck, Sebastian | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Nov 2, 2024 | Voigt | 1–0 | Grabowski | Round 5: Voigt, Dominik - Grabowski, Joshua | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Nov 1, 2024 | Grabowski | 1–0 | Sviridov | Round 3: Grabowski, Joshua - Sviridov, Vitaliy | Scandinavian Defense: Gubinsky-Melts Defense | |
| Nov 1, 2024 | Wernke-Schmiesing | 0–1 | Grabowski | Round 4: Wernke-Schmiesing, Sebastian - Grabowski, Joshua | Slav Defense: Geller Gambit | |
| Oct 31, 2024 | Grabowski | 1–0 | Wiege | Round 1: Grabowski, Joshua - Wiege, Matthias | Sicilian Defense: Open | |
| Oct 31, 2024 | Drozd | 0–1 | Grabowski | Round 2: Drozd, Maciej - Grabowski, Joshua | French Defense: Schlechter Variation | |