| Jun 7, 2026 | Burnus | 0–1 | Thieu | Round 5: Burnus, Finn Crispin - Thieu, Nguyen Gia Bao | Benoni Defense: Fianchetto Variation | |
| Jun 7, 2026 | Schrader | 0–1 | Thieu | Round 4: Schrader, Hans-Joachim - Thieu, Nguyen Gia Bao | Sicilian Defense: Lasker-Pelikan Variation | |
| Jun 6, 2026 | Thieu | ½–½ | Meessen | Round 3: Thieu, Nguyen Gia Bao - Meessen, Max | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Jun 6, 2026 | Gerken | 0–1 | Thieu | Round 2: Gerken, Fronke - Thieu, Nguyen Gia Bao | English Opening: King's English Variation | |
| Jun 5, 2026 | Thieu | 1–0 | Koldunov | Round 1: Thieu, Nguyen Gia Bao - Koldunov, Elena | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| May 25, 2025 | Bogomolow | 1–0 | Thieu | Round 5: Bogomolow, Sergej - Thieu, Nguyen Gia Bao | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| May 25, 2025 | Jacobi | 1–0 | Thieu | Round 4: Jacobi, Felix-Hagen - Thieu, Nguyen Gia Bao | Sicilian Defense: Staunton-Cochrane Variation | |
| May 24, 2025 | Thieu | 1–0 | Kaess | Round 3: Thieu, Nguyen Gia Bao - Kaess, Silas | Sicilian Defense: Alapin Variation | |
| May 24, 2025 | Holtwessels | 1–0 | Thieu | Round 2: Holtwessels, Jan - Thieu, Nguyen Gia Bao | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| May 23, 2025 | Thieu | 1–0 | Lesser | Round 1: Thieu, Nguyen Gia Bao - Lesser, Luan | Scandinavian Defense: Valencian Variation, Main Line | |
| Jan 5, 2025 | Belakhin | 0–1 | Thieu | Round 7: Belakhin, Alexander - Thieu, Nguyen Gia Bao | Nimzo-Indian Defense: Sämisch Variation | |
| Jan 4, 2025 | Thieu | ½–½ | Boerma | Round 5: Thieu, Nguyen Gia Bao - Boerma, Daniel | French Defense: MacCutcheon Variation, Dr. Olland Variation | |
| Jan 4, 2025 | Thieu | ½–½ | Schumann | Round 6: Thieu, Nguyen Gia Bao - Schumann, Steffen | Sicilian Defense: Alapin Variation | |
| Jan 3, 2025 | Thieu | 1–0 | Kiesel | Round 3: Thieu, Nguyen Gia Bao - Kiesel, Lucas | Sicilian Defense: Smith-Morra Gambit | |
| Jan 3, 2025 | Amrhein | ½–½ | Thieu | Round 4: Amrhein, Thorsten - Thieu, Nguyen Gia Bao | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Jan 2, 2025 | Thieu | 0–1 | Burkhardt | Round 1: Thieu, Nguyen Gia Bao - Burkhardt, Holger | Ruy Lopez: Bird Variation | |
| Jan 2, 2025 | Wilmink | 0–1 | Thieu | Round 2: Wilmink, Luca - Thieu, Nguyen Gia Bao | Sicilian Defense: Accelerated Dragon, Modern Variation | |
| Mar 17, 2024 | Thieu | 0–1 | Large | Reykjavik Open 2024 | Italian Game | |
