| May 30, 2026 | Hornych | ½–½ | Heilmann | DEM U12 2026 | Caro-Kann Defense: Exchange Variation | |
| May 29, 2026 | Tanukusuma | 1–0 | Heilmann | DEM U12 2026 | Caro-Kann Defense: Two Knights Attack | |
| May 28, 2026 | Heilmann | 0–1 | von Flottwell | DEM U12 2026 | Queen's Gambit Declined: Queen's Knight Variation | |
| May 27, 2026 | Shalovylo | ½–½ | Heilmann | DEM U12 2026 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 27, 2026 | Heilmann | 1–0 | Stojanoski | DEM U12 2026 | Queen's Gambit Declined: Modern Variation | |
| May 26, 2026 | Ding | ½–½ | Heilmann | DEM U12 2026 | Queen's Gambit Declined | |
| May 25, 2026 | Heilmann | ½–½ | Cremann | DEM U12 2026 | Benoni Defense: Semi-Benoni | |
| May 24, 2026 | Heilmann | 0–1 | Braren | DEM U12 2026 | Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation | |
| May 24, 2026 | Cao | ½–½ | Heilmann | DEM U12 2026 | Queen's Pawn Game: Accelerated London System | |
| Jun 9, 2025 | Vasylieva | * | Heilmann | Round 7: Vasylieva, Kira - Heilmann, Theo | ? | |
| Jun 9, 2025 | Hesdahl | 1–0 | Heilmann | Round 6: Hesdahl, Ralf - Heilmann, Theo | Rapport-Jobava System | |
| Jun 8, 2025 | Heilmann | 0–1 | Eichert | Round 5: Heilmann, Theo - Eichert, Jonathan | Slav Defense | |
| Jun 7, 2025 | Schocke | 1–0 | Heilmann | Round 3: Schocke, Mark - Heilmann, Theo | Old Indian Defense: Two Knights Variation | |
| Jun 7, 2025 | Heilmann | * | Yuke Mao | Round 2: Heilmann, Theo - Yuke Mao | ? | |
| Jun 6, 2025 | Vedant Kumar Saravana | 1–0 | Heilmann | Round 1: Vedant Kumar Saravana - Heilmann, Theo | Caro-Kann Defense: Classical Variation | |
| Aug 4, 2024 | Atar | 0–1 | Heilmann | Round 9: Atar, Semih Akif - Heilmann, Theo | English Opening: King's English Variation | |
| Aug 4, 2024 | Heilmann | 0–1 | Grooss | Round 8: Heilmann, Theo - Grooss, Jochen | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Aug 3, 2024 | Juntermanns | ½–½ | Heilmann | Round 7: Juntermanns, Peter - Heilmann, Theo | Queen's Pawn Game: Krause Variation | |
| Aug 3, 2024 | Shylov | 0–1 | Heilmann | Round 6: Shylov, Lev - Heilmann, Theo | Caro-Kann Defense: Advance Variation, Short Variation | |
| Aug 2, 2024 | Heilmann | * | Spielfrei | Round 5: Heilmann, Theo - Spielfrei | ? | |
| Aug 2, 2024 | Heilmann | 0–1 | Hamscher | Round 4: Heilmann, Theo - Hamscher, Markus | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Aug 1, 2024 | Heilmann | 1–0 | Lente | Round 3: Heilmann, Theo - Lente, Marius | Queen's Pawn Game: Accelerated London System | |
| Aug 1, 2024 | Gierhardt | 1–0 | Heilmann | Round 2: Gierhardt, Vito - Heilmann, Theo | King's Indian Attack | |
| Jul 31, 2024 | Heilmann | 0–1 | Neugirg | Round 1: Heilmann, Theo - Neugirg, Mika | Trompowsky Attack: Classical Defense, Big Center Variation | |
