← 59th Biel International Chess Festival 2026 · Triathlon | GenChall Qualifier · Round 4Materia, Marco vs Kosteniuk, Alexandra, Round 4, 59th Biel International Chess Festival 2026IMMateria, Marco2508 · FRA½–½GMKosteniuk, Alexandra2508 · SUI17 Jul, 12:00← Board 1Board 2 of 3Board 3 →