Give your AI assistant a chess brain.

A Chess.com player's Eloist chess style profile (1 of 16 descriptive styles), style axes, and headline stats from their real games.

What a Chess.com player's games have in common: recurring openings, how their games end, where they leave the named-openings map, style, tilt/edge/momentum headlines, and best time to play.

A Chess.com player's ranked action plan: what's actually costing them rating (opening leaks, time trouble, tilt, named-map departures, opponent-edge, slides), each with a concrete fix.

How long a Chess.com player's games keep matching a named opening: average depth on the 3,803-line naming map, who steps off first, the by-move curve, and their most common departure. Measures naming coverage, NOT opening theory.

A Chess.com player's clock profile, counted from per-move clocks: wins on time (and how many were DIRTY — opponent flagged while the player was lost), losses on time while WINNING, play-on behaviour when dead lost, the shuffle speed-up test, and a verdict (Clock Vampire / Dirty Flagger / Flag Victim / Never Say Die / Board Player / Honest Clock).

A Chess.com player's recent missed free material — positions where a capture won a piece by static exchange and they played something else. Returns FENs, the shot, what they played instead, and how many turns it stayed available.

A Chess.com player's ACTUAL opening repertoire as a tree built from their games: overall score as that color, their systems (positions they answer the same way almost every time), their holes (positions where they keep switching replies), and the most-played branches.

Where a Chess.com player habitually leaves the opening book, per opening: their record, how deep they stay on the naming map, and their most recurrent departure with the book's continuations — the 'correct yourself back to book' data.

A Chess.com player's playing rhythm: recent sittings (record, rating swing, verdict), median session length, and the fatigue curve — does their win rate decay as a session drags on?

Head-to-head profile comparison of two Chess.com players: style, rating, win rate, favorite openings, and who the numbers favor.

Search the 3,803-line classified chess openings database by name, ECO code, or moves. Returns matching lines with links.

Look up one opening by its key (from search_openings) or exact name. Returns its moves, ECO, and family.

Eloist's original club-level guide for an opening family: what it wants, 4-6 concrete plans/traps, and the main line. 54 hand-written guides.

Curated, verifiable chess history for an opening family — who named it, the champions who trusted it, the famous games. Hand-curated, never generated.

Analyze a chess position (FEN): legality, side to move, check/mate state, material balance, every capture graded by static exchange (SEE) so hanging pieces stand out, and legal-move count.

Analyze a full game PGN without an engine: missed free material (SEE-counted, with FENs), the material story (when a side went dead lost), game length, and whether per-move clocks are present. Set my_color to grade one side's misses.