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FIDE ID 3937100· born 2004 · last updated 5/12/2026
FIDE standard
1757
FIDE rapid
1697
FIDE blitz
1697
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Shortlist public Lichess and chess.com accounts for Hernandez Castillo 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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