Offline lessons
From first moves to calculation.
Chessboard · Desktop chess
Lessons. 40,000 puzzles. Stockfish or a friend.
A full-game Stockfish pass draws a win-chance curve and marks mistakes; jump to any position and play on.
Wood, green, blue, paper, or marble, with a choice of piece sets; the position stays.
From first moves to calculation.
28 themes; Rush, Streak, Look ahead, Blind mate.
Ten master games; other moves cost win chance.
Each rung a step harder; results move your rating.
Win or hold them against full-strength Stockfish.
Up to 5,000 lines a side, reviewed on a schedule.
v8.2.0Oct 1, 2026Release notes ›
No. Online matchmaking is not included; play the engine or a friend on the same screen. Optional sync, off by default, imports your new games from Lichess or Chess.com; it runs in the background, so you can keep playing while it fetches.
Paste or import a PGN, including FEN-start studies. Review the moves, jump to a position, or continue playing from it.
Yes. Games against the engine give you a rating, kept apart from your puzzle rating, and the result card shows each change. The Me page adds a rating curve, a practice calendar with your streak, and your strengths and weaknesses.
Up to 10,000. Filter them, find every game that reached a position, and explore their openings. Games are stored in the app's database with a mirror in a local data file. After a restart, a 10,000-game library lists again in about 0.2 seconds.
Chessboard