← Oberbank Challenger Open 2026 · Round 5Hertneck, Gerald vs Koellner, Ruben Gideon, Round 5, Oberbank Challenger Open 2026GMHertneck, Gerald2415 · GER0–1IMKoellner, Ruben Gideon2531 · GER19 Aug, 13:15Board 1 of 20Board 2 →