| 9 jun 2026 | Roobol, Martin 2308 | Sielecki, Christof 2385 | ½-½ | B15 Defensa Caro-Kann: Tartakower Variation | European Senior Chess Championship 2026 | 50+ | 12 | Ver |
| 8 jun 2026 | Sielecki, Christof 2385 | Van der Werf, Mark 2384 | ½-½ | C85 Apertura Española (Ruy López): Closed, Delayed Exchange | European Senior Chess Championship 2026 | 50+ | 56 | Ver |
| 7 jun 2026 | Dishman, Stephen 2259 | Sielecki, Christof 2385 | ½-½ | E64 Defensa India de Rey: Fianchetto Variation, Pterodactyl Variation | European Senior Chess Championship 2026 | 50+ | 15 | Ver |
| 6 jun 2026 | Sielecki, Christof 2385 | Hjartarson, Johann 2467 | ½-½ | E97 Defensa India de Rey: Orthodox Variation, Aronin-Taimanov Defense | European Senior Chess Championship 2026 | 50+ | 18 | Ver |
| 5 jun 2026 | Thorhallsson, Throstur 2397 | Sielecki, Christof 2385 | ½-½ | B13 Defensa Caro-Kann: Exchange Variation | European Senior Chess Championship 2026 | 50+ | 20 | Ver |
| 4 jun 2026 | Sielecki, Christof 2385 | Fabiano, Giuseppe Edoardo 2081 | 1-0 | A15 Apertura Inglesa: Anglo-Indian Defense, King's Knight Variation | European Senior Chess Championship 2026 | 50+ | 39 | Ver |
| 3 jun 2026 | Coste, Thierry 2103 | Sielecki, Christof 2385 | 0-1 | A48 Ataque Torre: Fianchetto Defense | European Senior Chess Championship 2026 | 50+ | 38 | Ver |
| 1 jun 2026 | Sielecki, Christof 2385 | Degraeve, Jean-Marc 2494 | ½-½ | E97 Defensa India de Rey: Orthodox Variation, Aronin-Taimanov Defense | European Senior Chess Championship 2026 | 50+ | 15 | Ver |
| 5 oct 2025 | Sielecki, Christof 2390 | Motuz, Karol 2252 | 0-1 | C77 Apertura Española (Ruy López): Morphy Defense, Tarrasch Variation | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 44 | Ver |
| 4 oct 2025 | Thorhallsson, Throstur 2391 | Sielecki, Christof 2390 | 1-0 | C55 Apertura Italiana: Two Knights Defense, Modern Bishop's Opening | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 86 | Ver |
| 3 oct 2025 | Sielecki, Christof 2390 | Holzke, Frank 2409 | ½-½ | A30 Apertura Inglesa: Symmetrical Variation | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 13 | Ver |
| 2 oct 2025 | Van der Werf, Mark 2395 | Sielecki, Christof 2390 | ½-½ | E92 Defensa India de Rey: Orthodox Variation, Gligoric-Taimanov System | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 18 | Ver |
| 1 oct 2025 | Sielecki, Christof 2390 | Bellia, Fabrizio 2390 | 1-0 | D32 Defensa Tarrasch: Symmetrical Variation | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 44 | Ver |
| 30 sep 2025 | Lacasa Diaz, Josep Anton 2301 | Sielecki, Christof 2390 | ½-½ | E98 Defensa India de Rey: Orthodox Variation, Classical System | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 41 | Ver |
| 29 sep 2025 | Sielecki, Christof 2390 | Dishman, Stephen 2211 | ½-½ | B36 Defensa Siciliana: Accelerated Dragon, Maróczy Bind | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 27 | Ver |
| 28 sep 2025 | Lasinskas, Povilas 2125 | Sielecki, Christof 2390 | 0-1 | E61 Defensa India de Rey | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 48 | Ver |
| 27 sep 2025 | Sielecki, Christof 2390 | Dejanovic, Mladen 2037 | 1-0 | C10 Defensa Francesa: Rubinstein Variation, Blackburne Defense | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 29 | Ver |