What you get
Unlimited analysis
Analyze as many games and positions as you want with no daily cap.
Stockfish 18 in-browser
Deep, high-quality evaluation runs locally on your device.
Offline-ready workflow
After first load, review saved games, puzzles, and stats without internet.
Proof at a glance
FeatureChessIQTypical tools
Account required—
Daily analysis cap—
Paywall for deep analysis—
Works offline—
Common questions
Is ChessIQ really free?
Yes. Core analysis, puzzles, and statistics are free with no account required.
Why is there no analysis cap?
The engine runs on your device, so there is no metered cloud compute to ration.
How do I start?
Open Review Games, enter a Chess.com or Lichess username, or paste a PGN and analyze.