EloLeak

The training desk built from your own games

See exactly what costs you Elo. Then train it away.

Stockfish grades every move you play, ranks your weaknesses by the rating points they cost, and turns your own blunders into drills that come back until you stop missing them. You always know the one thing to fix next.

No signup. No password. A performance rating from your real games, in seconds.

Start your 7-day free trial Log in

Try it: a real member blunder live demo

endgame · move 29 · black to move

Here the member played Kh7 and dropped 80.2 win points. Find the better move. Tap your piece, then the target square (or drag it).

Show the engine's move

Stockfish plays Qxd8.

endgame · move 23 · white to move

Here the member played h3 and dropped 79.0 win points. Find the better move. Tap your piece, then the target square (or drag it).

Show the engine's move

Stockfish plays Rxe5.

endgame · move 46 · black to move

Here the member played Rb6 and dropped 52.5 win points. Find the better move. Tap your piece, then the target square (or drag it).

Show the engine's move

Stockfish plays Ne2+.

Engine-verified, from real games.
58,300+ moves graded by Stockfish 750+ games diagnosed

Why most analysis tools do not make you better

They stop at "here is your blunder." Improvement needs three steps.

Setup is one field: your username. Stockfish starts grading your games right away, and you get an email the moment your full diagnosis is ready.

1

Diagnose

Stockfish grades every move of your games and ranks your leaks by the Elo each one costs you, worst first. No thirty charts to interpret: a verdict.

2

Prescribe

A coach that puts one leak on your plate with the drills to fix it, watches across re-scans whether it actually shrinks, and re-aims when it does not. Plus a weekly plan from your hours, and the one book worth reading for your exact weakness.

3

Train on your own mistakes

Your blunders become puzzles the engine verifies, and the deck re-serves each one on a spaced schedule until you stop missing it. This is the step every other tool skips.

The diagnosis

Your leaks, priced in Elo

Stockfish grades every move of your last 250 games and ranks what it finds by the rating points it costs you. Your desk opens on the most expensive leak, with the work laid out. You never wonder what to fix first.

Openings, blunders by phase, time trouble, conversion of winning positions, performance against stronger and weaker players: all measured on your real games, each with its price tag.

Your leaks, worst first real member data
1 Blunders by phase161.5 pts
2 Time management36.2 pts
3 Converting winning positions8.8 pts
4 Performance vs opponent strength4.4 pts
5 Opening repertoire3.5 pts

Fixing leak #1 is worth about +120 Elo for this member. The coach opens there.

endgame · move 51 · white to move

Here the member played a6 and dropped 73.4 win points. Find the better move.

Show the engine's move

Stockfish plays Rg8.

middlegame · move 28 · black to move

Here the member played f5+ and dropped 49.7 win points. Find the better move.

Show the engine's move

Stockfish plays Qc3+.

The training

Your own blunders, back on the board

Every blunder becomes a puzzle with an engine-verified solution, playable on a real board. Miss it and it returns tomorrow; nail it and it fades. Spaced repetition on your own mistakes, the step every other chess tool skips.

Plus a calculation gym on your critical positions, and endgame, pawn structure and repertoire drills, all built from your games instead of a random tactics pack.

The preparation

Scout tonight's opponent like a titled player

Paste their Lichess or Chess.com username, or search a tournament player by FIDE name. Two minutes later: their repertoire with real scores, the line that already loses for them, and a battle plan for each color, topped by one verdict: where to steer the game.

Then spar their ghost, a sparring partner built from their real games, before you ever sit down.

Your battle plan real scout

If you have White

1 Open 1.e4: they score 63.6% against it over 11 games, vs 80.0% against 1.d4
2 Their stock reply is e6 (5 games, 70.0% for them): prepare your line in advance, they walk into it every time

If you have Black

1 Expect e4: it opens 80% of their White games. Have ONE prepared answer, not three
2 They score 95.2% with White: equalize solidly and push the game into the late phase, where they crack

Only on EloLeak

Four things no platform tool does

👻 Ghost sparring

Play a bot built from your opponent's real games and strength, before the real game.

💡 Steal this novelty

Fresh ideas strong players tried in your openings in the last 12 months, found in 10 million+ master games.

🏆 Tournament pack

Scout your whole pairing list by FIDE name, print the dossier, take it to the board.

📉 A coach that measures

Every re-scan shows whether leak #1 actually shrank. No progress theater, a delta.

Lichess and Chess.com are great. Here is what they do not do.

What you get that a free game review does not

What you actually wantFree & premium sitesEloLeak
Stockfish on every game, read together one at a time✓
Your leaks ranked by the Elo they cost ✗✓
A weekly plan, not just charts ✗✓
Puzzles from your own blunders ✗✓
Spaced repetition on your mistakes ✗✓
Scout the opponent you play tonight ✗✓
A calculation trainer on your own critical positions ✗✓
A living dossier on every rival you play ✗✓
A strength estimate that is not made up often way offfrom a formula

Free tools set the baseline. At $9.99/month, EloLeak earns its keep on the rows a chart explorer cannot touch.

What members get

One subscription, the whole training room

No add-ons, no upsells. Every tool a club player pays a coach for, built from your own games.

🔍 Understand your game

Stockfish grades every game and ranks your leaks by the Elo they cost, worst first.

  • Move-by-move debrief with your Accuracy %
  • Skills radar, attack to endgame
  • Tilt and nemesis patterns

🎯 Train it away

Your own blunders become puzzles that come back until you stop missing them.

  • Real board, engine one tap away
  • Calculation gym on your critical positions
  • Endgames, structures and repertoire drills

♟️ Prepare to win

Scout any opponent from their public games, online username or FIDE name.

  • A battle plan for each color
  • Spar their ghost before you meet them
  • Tournament pack for a whole pairing list

📈 Watch it close

Every re-scan measures whether the leak is actually shrinking.

  • Rating goal, pace and streak
  • A weekly review in your inbox
  • An honest strength estimate, formula shown

Try something first

Not sure yet? See your real strength first.

A performance rating from your actual results against rated opponents. No signup, no email, nothing to install.

Get my free strength check →

Pricing

7 days free, then $9.99/month. Everything included.

Every membership starts with a 7-day free trial: the full diagnosis, your coach's plan and training schedule, spaced-repetition puzzles from your own games, opponent scouting, an analysis board with the engine in your browser, weekly reviews and re-scans. Membership comes with the EloLeak newsletter.

Billing runs through the newsletter platform. Cancel anytime, in one click, no questions, trial included.

Start your 7-day free trial

Cancel before day 7 and you pay nothing.

Fair questions

Before you ask

How do I get in after subscribing?

Come back here, hit Log in, and use the same email as your subscription. We email you a one-time sign-in link. No password to remember.

Lichess Insights and Chess.com Game Review already exist. Why pay?

They stop at "here is your blunder." EloLeak runs Stockfish on every game together, ranks your leaks by the Elo they cost, hands you a plan, and re-serves your own mistakes as puzzles until you stop missing them. It also scouts the opponent you play tonight, which no platform tool does. The chart is not the point; closing the leak is.

Why not just paste my games into ChatGPT?

Try it: language models hallucinate chess analysis with total confidence. Every number here comes from Stockfish, over your full sample. Your puzzles are your own blunders with engine-verified solutions, and the desk re-checks your account every week without being asked. A chat window does none of that.

Is the estimated strength accurate?

It is a performance rating from your results against rated opponents, with the formula shown, not a black-box guess that tells a beginner they play like a club player. If we do not have enough games to be honest, we say so instead of inventing a number.

Do you need my password?

No. Both platforms publish rated games through free, official public APIs. We only need the username.

Is scouting an opponent fair play?

Preparing against a known opponent from their public games is what titled players do before every round. Scout does it in two minutes, from games they already played in public.

Your next rating jump is already in your games. Let the engine find it.

One plugged leak is worth more than a month of random puzzles.

Start your 7-day free trial

7 days free, then $9.99/month · Cancel anytime, in one click