Grenke is Europe’s largest classical-format Open by entries — 1,400+ players in the A-group alone, plus C/U2000 and youth sections that bring total attendance over 3,000 each year. Sponsored by GRENKE AG, the German financial-services firm, and held at the Messe Karlsruhe exhibition centre over Easter weekend.
Format
9-round Swiss at 90+30 over five days. The full grandmaster contingent typically includes 100+ titled players. Prize fund split across rating bands; main €25,000 first prize plus side awards for U2400 / U2200 / U2000 / women / junior categories.
The 2026 Edition
Suyarov, an Uzbek grandmaster, won outright with 8/9 — beating the highest-rated Western European of the field in the final round. The accompanying Grenke Freestyle Open ran in parallel for the second year, a separate 4-day Chess 960 Swiss with its own prize fund.