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FIDE ID 21026190· born 1999 · last updated 9/24/2026
Search for the accounts Mateusz Koc plays online, then open one to see its openings and practice the lines.
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FIDE rapid
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FIDE blitz
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No tournament games of Mateusz Koc are on file yet, so this search uses their name, country and rating. Adding their games under More options makes it stronger.
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Results are leads to check, not proof of who owns an account.
Search for Mateusz Koc's online accounts first. Then open one to see the openings it plays, move by move, and practice the positions.