Android · free to play
Chess that keeps honest time.
The server validates every move and holds both clocks, so a flag falls when it actually falls. Offline, the engine plays eight strengths with no signal at all. Puzzles, arenas and voice when you want company.
Server-side truth
Every move is checked against the server's own board, and both clocks live there too.
Plays without signal
The engine ships inside the app. Eight strengths, from one that blunders to one that does not.
Review that makes sense
Moves are graded on winning chances, not raw centipawns, so a blunder is called a blunder.
Arenas and puzzles
Timed arenas with live standings, private rooms by code, and puzzles with one clear best move.
The paperwork, in plain words
Three documents, written against what the app actually does rather than copied from somewhere else.