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FIDE ID 15210049· born 2000 · last updated 9/24/2026
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Shortlist public Lichess and chess.com accounts for Hasselmann William via fuzzy name, country, and rating-band signals. Fastest path; works without sample games.
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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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We checked our stored public PGN sources for FIDE ID 15210049 and do not have usable games for Hasselmann William yet. Paste games below to run repertoire matching by play pattern.
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