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FIDE ID 4402987 · born 1983 · last updated 5/12/2026
Standard
2150
Rapid
2144
Blitz
2121
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Shortlist public Lichess and chess.com accounts for Sierra Fonseca 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 4402987 and do not have usable games for Sierra Fonseca yet. Paste games below to run repertoire matching by play pattern.
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