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FIDE ID 54543339 · born 2005 · last updated 5/12/2026
Standard
1633
Rapid
1483
Blitz
1589
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Shortlist public Lichess and chess.com accounts for Costal Fernandez 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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