Stockfish + AI coach + opponent prep

Your personal chess coach. Engine-sharp. Human-clear.

Import your Lichess and Chess.com games, see exactly where they turned, and train with a coach that explains every idea in plain language and shows its engine evidence.

Start training free Try the analysis board

Free and open source. No card, no install.

Start position+0.3

Stockfish 17
Depth 30+ on the server
Lichess & Chess.com import
Masters database
Opening explorer
Socratic AI coach
Opponent preparation
Win-probability accuracy
Instant in-browser engine
Open source, GPL-3.0

Everything in one desk

Four tools. One honest picture of your chess.

AI coach

A coach that asks before it tells.

Ask about any position or any of your games. The coach teaches with questions, draws arrows on the board, and quotes the engine evidence behind every claim.

Socratic by default, direct when you ask
Arrows and highlights on the board
Grounded in Stockfish, not guesses

Why was 14...Qe7 a mistake?

Before I tell you: what does Qe7 leave undefended?

The knight on d7?

Yes. After Bxd7+ the pin wins material. Engine: +4.2 at depth 30.

Analysis

See the exact move the game turned.

Instant engine in your browser, depth 30 and beyond from the server. Moves are classified by win-probability loss, so a blunder looks like one.

Every move graded, with accuracy per side
Evaluation graph with critical moments
Unlimited variations in a move tree

Evaluation graphAccuracy 87%

● Blunder 8...Nxe4● Best 5.Bc4

Opponent prep

Walk in knowing what they will play.

Build your opponent's repertoire from their public games, set it against yours, and find where your lines collide and where you have nothing ready.

Repertoire from Lichess and Chess.com games
Collision map against your own openings
A prep report you can study before the round

You, as White

1.e4 e5 2.Nf3

Italian, 61%

Opponent, as Black

1.e4 c5 2.Nf3

Sicilian, 74%

Collision at move 2

They always meet 1.e4 with the Sicilian. You have no prepared answer to the Najdorf. Study it first.

Opening explorer

Masters and millions of games, one click.

Browse the masters database and Lichess games from any position, with win, draw and loss bars, top games and the opening name as you go.

Masters and Lichess sources
Win/draw/loss bars per move
ECO classification for every line

Masters databaseA00

e41.2M
d4980k
Nf3410k
c4260k

How it works

From signup to sharper in three steps.

Step 1
Connect your accounts
Enter your Lichess and Chess.com usernames. We check they exist before you move on.
Step 2
Import and analyse
Your recent games are imported and run through Stockfish. Every move graded, every turning point found.
Step 3
Train with your coach
Ask why you lost, drill your weak openings, and prepare for your next opponent.

Your next rating point is hiding in a game you already played.

Connect your accounts, import your games and let the coach find it.

Create your free account Try the analysis board