or
Loading player profile…
FIDE ID 521031975· born 2011 · last updated 9/24/2026
Start with a known public account, or find preparation leads from names and game samples.
FIDE standard
-
FIDE rapid
-
FIDE blitz
-
Quick name search
Shortlist public Lichess and chess.com accounts for Castillo via fuzzy name, country, and rating-band signals. Fastest path; works without sample games.
Costs 1 credit
AI matching by sample game
Searching public databases for known games ofCastillo…
Have your own PGNs? You can also paste them below once this finishes; or use Quick name search above to skip this step.
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.
Pick a candidate account above to unlock the report.
AI matching by sample game
We checked our stored public PGN sources for FIDE ID 521031975 and do not have usable games for Castillo yet. Paste games below to run repertoire matching by play pattern.
AI Scout can surface accounts even when their handle looks nothing like their name; the right game count is benchmarked on /how-it-works.