Round 4 of Schack-SM 2026 in Jönköping continues with IM Seo, GM Blomqvist, and IM Trost battling for top spots. 10-player round-robin format with 90 min / 40 moves + 30 min + 30 sec / move. Blomqvist leads, Seo and Trost challenge. Ratings and final standings hinge on results. Key games shape tournament outcome.