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FIDE ID 21010439· born 2010 · last updated 5/12/2026
FIDE standard
-
FIDE rapid
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FIDE blitz
1401
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Shortlist public Lichess and chess.com accounts for Stefanczyk via fuzzy name, country, and rating-band signals. Fastest path; works without sample games.
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Prep report
Their repertoire vs yours
Once you have a candidate account, we cross-reference its opening tree against your imported games, surfacing the lines they play that you don’t know, the leaks in their repertoire you can punish, and the gaps in yours you’ll need to plug before the game.
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AI matching by sample game
We checked our stored public PGN sources for FIDE ID 21010439 and do not have usable games for Stefanczyk yet. Paste games below to run repertoire matching by play pattern.
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