The Sofia Cup 2026 kicks off Saturday in Bulgaria with four heavyweight rapid players battling in a nine-round Swiss. Firoujza, Cheparinov, Mamedov, and Iturrizaga clash in the Balkan Rapid and Blitz Championships at 10'+5" time control. This first round sets the tone for what shapes up as a serious test of classical technique compressed into rapid chess. Expect sharp preparation and tactical fireworks.