| Nov 1, 2025 | Buciu | 0–1 | Mirza | Round 11: Buciu, Aurel-John - Mirza, Gabriel | Indian Defense | |
| Oct 31, 2025 | Koops | 1–0 | Buciu | Round 10: Koops, Randolf - Buciu, Aurel-John | Queen's Pawn Game | |
| Oct 30, 2025 | Pomante | 0–1 | Buciu | Round 9: Pomante, Sergio - Buciu, Aurel-John | Scandinavian Defense: Valencian Variation | |
| Oct 29, 2025 | Buciu | 0–1 | Balzer | Round 8: Buciu, Aurel-John - Balzer, Lars | Queen's Pawn Game: Modern Defense | |
| Oct 28, 2025 | Marino | 0–1 | Buciu | Round 7: Marino, Oscar - Buciu, Aurel-John | Scandinavian Defense: Valencian Variation | |
| Oct 26, 2025 | Buciu | 0–1 | Skou | Round 6: Buciu, Aurel-John - Skou, Niels | Rapport-Jobava System | |
| Oct 25, 2025 | Isaev | 1–0 | Buciu | Round 5: Isaev, Yuriy V - Buciu, Aurel-John | Queen's Gambit Declined: Three Knights Variation | |
| Oct 24, 2025 | Buciu | 1–0 | Bondar | Round 4: Buciu, Aurel-John - Bondar, Serge | Queen's Pawn Game: London System | |
| Oct 23, 2025 | Colangeli | ½–½ | Buciu | Round 3: Colangeli, Claudio - Buciu, Aurel-John | Slav Defense: Three Knights Variation | |
| Oct 22, 2025 | Buciu | 0–1 | Stranz | Round 2: Buciu, Aurel-John - Stranz, Richard | Indian Defense | |
| Oct 21, 2025 | Volkov | 1–0 | Buciu | Round 1: Volkov, Dmitriy - Buciu, Aurel-John | Scandinavian Defense: Valencian Variation | |
| Jul 12, 2025 | Ackermann | 1–0 | Buciu | Round 6: Ackermann, Robert - Buciu, Aurel-John | Scandinavian Defense: Valencian Variation | |
| Jul 11, 2025 | Buciu | ½–½ | Mitschka | Round 5: Buciu, Aurel-John - Mitschka, Manfred | Queen's Pawn Game: London System, with e6 | |
| Jul 10, 2025 | Stierle | ½–½ | Buciu | Round 4: Stierle, Martin - Buciu, Aurel-John | Queen's Gambit Declined: Baltic Defense, Pseudo-Slav | |
| Jul 9, 2025 | Krannich | 1–0 | Buciu | Round 3: Krannich, Thomas - Buciu, Aurel-John | King's Indian Attack | |
| Jul 8, 2025 | Buciu | ½–½ | Puschendorf | Round 2: Buciu, Aurel-John - Puschendorf, Steffen | London System | |
| Jul 7, 2024 | Buciu | ½–½ | Frankenberger | Round 7: Buciu, Aurel-John - Frankenberger, Ralf | Queen's Pawn Game: London System | |
| Jul 6, 2024 | Buciu | 0–1 | Dannhauer | Round 6: Buciu, Aurel-John - Dannhauer, Frank | Queen's Pawn Game: London System | |
| Jul 5, 2024 | Dirk Schiller | 0–1 | Buciu | Round 5: Dirk Schiller - Buciu, Aurel-John | Queen's Pawn Game: Accelerated London System | |
| Jul 4, 2024 | Buciu | 1–0 | Schomann | Round 4: Buciu, Aurel-John - Schomann, Michael | Queen's Pawn Game: London System | |
| Jul 3, 2024 | Puschendorf | 1–0 | Buciu | Round 3: Puschendorf, Steffen - Buciu, Aurel-John | Slav Defense: Modern Line | |
| Jul 2, 2024 | Kottke | ½–½ | Buciu | Round 2: Kottke, Steffen - Buciu, Aurel-John | Scandinavian Defense: Valencian Variation | |
| Jul 1, 2024 | Buciu | ½–½ | Robert Ackermann | Round 1: Buciu, Aurel-John - Robert Ackermann | Queen's Pawn Game: London System | |
| Oct 26, 2023 | Buciu | * | Matzat | 50+ World Senior Championship | ? | |
| Oct 25, 2023 | Boulard | * | Buciu | 50+ World Senior Championship | ? | |
| — | Buciu | 0–1 | Glimbrant | Olomouc 2025 d1 | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |