Stockfish powered · Deep analysis

Know yourchess.

Deep analytics for every Chess.com and Lichess game you've ever played. Find the patterns behind your losses and train what actually matters.

No card required to start · Works with Chess.com and Lichess

1.4M
Positions analyzed
22K
Games reviewed
45K
Blunders caught
985
Puzzles trained
Live counts, refreshed every 6 hours

Why ChessIQ vs the built-in tools?

ChessIQ doesn't replace Chess.com or Lichess. It sits on top of them and does the work their built-in dashboards don't.

FeatureChessIQChess.comLichess
Puzzles built from the moves you actually miss
We name the mistake you keep makingLimited
See which tactical themes you actually missLimitedLimited
Drill every variation, not just the main lineLimited
Know exactly where your prep endsLimited
Endgame drills with tablebase-perfect feedbackLimitedLimited
Pre-analyzed game review (no waiting)Limited
A skill tree that shows where you're strong and where you're guessing

Comparison reflects publicly documented features as of 2026. Things change - if we're wrong, tell us.

Simple. Honest. Cheaper than your coffee.

Free forever for the basics. Premium for the deep work that actually moves your rating.

Free
$0

Get started, see the platform, sync your games.

  • Sync games from Chess.com and Lichess
  • Dashboard with profile + recent games
  • Daily puzzle
  • Opening explorer + masters database
  • Endgame trainer + Lichess tablebase
  • Review 1 new game per day (rewatch any reviewed game any time)
Create account
Recommended
Premium
$6.99/mo
Billed monthly

Everything ChessIQ does. 7-day free trial. Cancel any time before day 8 and you won’t be charged.

  • Unlimited game review with engine analysis and eval graph
  • Personalized puzzles and trainers
  • Repertoire builder + spaced-repetition drilling
  • Blunder replay and loss-pattern detection
  • Deep insights, skill tree, time-management analysis
  • Unlimited opening trainer drills + quizzes

Cancel any time from Settings.

Intelligence built for serious improvement.

??Blunder
01Stockfish powered
Game Review

Every move, dissected.

Chess.com-quality move classification at engine depth 20. Blunders, mistakes, brilliancies, and best moves annotated on a live board with an evaluation graph that tells the whole story.

Top weaknesses · last 30 days
Hanging pieces
28
Missed forks
22
Back-rank weak
16
Pin overlooked
12
King exposed
9
02Pattern recognition
Loss Patterns

Understand why you lose.

Not just 'you blundered.' Identify the recurring patterns - missed forks, weak king safety, overextended pawns - that end your games. Track them across hundreds of games.

OpeningGamesWin %Acc
Caro-Kann8462%88.2
Ruy Lopez6254%84.7
Sicilian Najdorf4141%79.3
London System2838%72.4
03ECO database
Opening Intelligence

Know your lines cold.

Win rate, accuracy, and preparation depth for every opening you play. See where you deviate from theory, how much it costs you, and which lines to study.

White to play · M1
04Adaptive difficulty
Puzzle Training

Train what breaks your games.

Personalized puzzles built from your actual blunders. Not random tactics - the exact patterns that end your games, curated and ranked by how badly you need them.

Three steps to a sharper game.

1

Create your account

Sign up with your email and link your Chess.com or Lichess username. Takes 30 seconds.

2

We analyze your games

Your last 30 days of games are queued automatically. Stockfish does the rest - no waiting.

3

Improve every session

Deep stats, game review with Stockfish, and personalized puzzle recommendations waiting for you.

Questions before you sign up.

Is my Chess.com or Lichess data safe?

We only read public data through the official Chess.com and Lichess APIs. We never ask for your password and never write back to your account. Your analysis stays private to your ChessIQ account.

How long does analysis take?

Background analysis runs continuously, so most games are reviewed within minutes of you signing up. While Stockfish chews through your history, you can already use the rest of the site - openings, puzzles, the analysis board.

Do I need to install anything?

No. ChessIQ runs entirely in your browser on desktop or mobile. No engine downloads, no extensions.

What's the difference vs Chess.com's built-in analysis?

Chess.com analyzes one game at a time when you click review. We pre-analyze every game you've ever played at engine depth and surface patterns across hundreds of games - the recurring weaknesses, your worst openings, the puzzle types that keep beating you. We also work for your Lichess games.

What does it cost?

Sign up free and analyze your games on the free tier. Premium unlocks unlimited game review, repertoire builder, blunder replay, and the deep insight surfaces. Cancel any time.

Can I delete my data?

Yes. Account deletion in Settings removes your ChessIQ account and all cached game analysis. Your underlying Chess.com and Lichess accounts are unaffected because we never had write access to them.

Ready to understand your chess?

Create an account and your games will be analyzed automatically - no waiting.

No card required to start