| Aug 30, 2024 | Koscielski | ½–½ | Becker | Round 8: Koscielski, Janusz - Becker, Michael | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Aug 26, 2024 | Koscielski | 1–0 | Lindam | Round 4: Koscielski, Janusz - Lindam, Ingo | Sicilian Defense: Alapin Variation | |
| Aug 25, 2024 | Noldt | 0–1 | Koscielski | Round 3: Noldt, Torsten - Koscielski, Janusz | Hungarian Opening: Symmetrical Variation | |
| Aug 24, 2024 | Springer | ½–½ | Koscielski | Round 2: Springer, Ondrej - Koscielski, Janusz | Torre Attack: Fianchetto Defense | |
| Aug 23, 2024 | Koscielski | 1–0 | Stern | Round 1: Koscielski, Janusz - Stern, Geoffrey | French Defense: Tarrasch Variation, Guimard Defense, Main Line | |
| Aug 23, 2024 | Koscielski | ½–½ | Metz | Round 6: Koscielski, Janusz - Metz, Hartmut | French Defense: Tarrasch Variation, Closed Variation, Main Line | |
| Aug 23, 2024 | Heimrath | ½–½ | Koscielski | Round 5: Heimrath, Reiner - Koscielski, Janusz | French Defense: Two Knights Variation | |
| Aug 23, 2024 | Grabe | 0–1 | Koscielski | Round 7: Grabe, Lutz - Koscielski, Janusz | Queen's Pawn Game: London System | |
| Aug 23, 2024 | Nekrasov | 1–0 | Koscielski | Round 9: Nekrasov, Mihail - Koscielski, Janusz | Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line | |
| Dec 16, 2022 | Koscielski | 0–1 | Haydon | ebrcc2022 | Caro-Kann Defense: Classical Variation | |
| Dec 16, 2022 | Koscielski | 0–1 | Kacprzak | Katowice | Sicilian Defense: Alapin Variation | |
| Dec 16, 2022 | Haydon | 0–1 | Koscielski | ebrcc2022 | King's Indian Defense: Fianchetto Variation, Larsen Defense | |
| Dec 16, 2022 | Kacprzak | 1–0 | Koscielski | Katowice | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Aug 12, 2022 | Koscielski | 1–0 | Noack | 50+ German Senior Championship | Caro-Kann Defense: Exchange Variation | |
