| 24 jul 2026 | Schulz, Lukas 2349 | Kardoeus, David 2162 | 1-0 | C47 Apertura de los Cuatro Caballos: Glek System | German Chess Championship 2026 | Candidates Men | 46 | Ver |
| 23 jul 2026 | Herrmann, Jakob 2197 | Kardoeus, David 2162 | 1-0 | D79 Defensa Neogrünfeld: Ultra-Delayed Exchange Variation | German Chess Championship 2026 | Candidates Men | 30 | Ver |
| 22 jul 2026 | Kardoeus, David 2162 | Stricker, Florian 2231 | 0-1 | C03 Defensa Francesa: Tarrasch Variation, Modern System | German Chess Championship 2026 | Candidates Men | 31 | Ver |
| 22 jul 2026 | Kardoeus, David 2162 | Born, Mario 2093 | ½-½ | B15 Defensa Caro-Kann: Tartakower Variation | German Chess Championship 2026 | Candidates Men | 53 | Ver |
| 21 jul 2026 | Michalczak, Thomas 2227 | Kardoeus, David 2162 | 1-0 | C84 Apertura Española (Ruy López): Closed, Martinez Variation | German Chess Championship 2026 | Candidates Men | 40 | Ver |
| 20 jul 2026 | Kardoeus, David 2162 | Moeller, Maurin 2301 | 0-1 | B45 Defensa Siciliana: Four Knights Variation, Cobra Variation | German Chess Championship 2026 | Candidates Men | 69 | Ver |
| 20 jul 2026 | Pfatteicher, Lukas 2276 | Kardoeus, David 2162 | 0-1 | D31 Defensa Semieslava: Accelerated Move Order | German Chess Championship 2026 | Candidates Men | 46 | Ver |
| 19 jul 2026 | Kardoeus, David 2162 | Daniel Malek 2312 | 0-1 | D37 Gambito de Dama rehusado: Three Knights Variation | German Chess Championship 2026 | Candidates Men | 39 | Ver |
| 19 oct 2025 | Kardoeus, David 2153 | Hagemann, Elmar 2127 | 0-1 | B95 Defensa Siciliana: Najdorf Variation | Runde 2: SK Lehrte - Bremen | 21 | Ver |