Chess tools.

Choose the task you want to work on. Bring a position, a game, or a little curiosity.

Next move finder

Set a position and get one Stockfish suggestion. You control the moves.

Explore a game, navigate variations, and compare engine continuations.

Place pieces, choose castling rights, and create a FEN position.

Import a completed game and examine its evaluation move by move.

Estimate a rating change for a win, draw or loss with generic Elo.

Practice 720 tactical positions with hints, replies and solutions.

Solve one shared challenge, selected each day at midnight UTC.

Learn the ideas behind 35 lines in seven opening courses.

A two-player timer with custom time and Fischer increment.

Keep a searchable library of games on this device.

Turn reviewed positions into engine-guided exercises.

Track puzzle attempts, difficulty and assistance.

Run a fixed tactical suite and export measured results.