Sosna, Mateusz

Mateusz Sosna, a 13-year-old Polish player. He is progressing steadily with +26 Elo over the past 12 months. 12 rated games in the past year (≈6/year long-term). Recent standard appearances include Druzynowe Mistrzostwa Slaska Juniorow - I Liga 2026 Round 6-9, Druzynowe Mistrzostwa Polski- IV Liga Juniorow 2026 (wojewodztwo slaskie), and Druzynowe Mistrzostwa Slaska Juniorow - I Liga 2026 Round 1-5. Also played 1 rapid event (including IV Turniej Szachowy o Puchar Wojta Gminy Gorzyce do lat 15 (do FIDE)) recently. His peak of 1438 was reached at age 13 (Apr 2026).