Chess Opponent Analysis — Scout Before You Play

Find your opponent's weakest opening lines before you play them.

Opponent

Your account

Color pairing

Time class

Last 12 months

What a report looks like

Example, not real data

You play White. Their weakest lines as Black, from their last 12 months:

Sicilian, Alapin (1.e4 c5 2.c3)23 games30% score
French, Advance (1.e4 e6 2.d4 d5 3.e5)14 games36% score
Queen's Gambit Declined (1.d4 d5 2.c4 e6)19 games42% score

Steer toward the Alapin: they score 30% there, and the report shows the exact move where their games go wrong.

What the scouting report shows

Their weakest openings as White and Black — the lines where they lose most
How they respond under time pressure
Their win rate by phase: opening, middlegame, endgame
Recurring mistakes they repeat across multiple games
Head-to-head history if you have played before

Scout Your Next Chess Opponent

Enter an opponent's Lichess or Chess.com username and Audit Chess builds a prep report from their public games — their weakest openings by colour, the positions they misplay, and the exact lines to steer toward. Runs in your browser, no account needed.

Weakest openings by colour
See which openings your opponent loses with most, split by White and Black.
Exact lines to play
Get the specific move orders that have cost them the most rating.
Endgame & tactical gaps
Surface the endgame types and tactical motifs they consistently mishandle.
How to beat them + prep plan
Three evidence-backed actions, then the moves to play in the positions they reach most, ranked by master results and their own record.
Accuracy & repertoire explorer
Their engine accuracy by phase after they leave theory, and their whole opening tree to browse move by move.
Built from real games
Every insight comes from their own public game history, analyzed by Stockfish locally. Then rehearse against a bot of their openings on the Rival page.

Frequently asked questions

How do I prepare for a specific chess opponent?

Enter their Lichess or Chess.com username. Audit Chess analyzes their public games and reports their weakest openings, recurring mistakes and the lines to prepare against them.

Is opponent scouting free?

Yes. Scouting is free and needs no account — just a public username.

Where does the scouting data come from?

Only public game history from Lichess and Chess.com, replayed through Stockfish in your own browser. Nothing is uploaded.