On phones: tap the FULLSCREEN button for a pure full-screen game. On desktop: click the game once if keys don't respond.
Play zug zwang chess — Free Online
Play chess free in your browser against a real α–β chess engine with live search telemetry — or take on a friend in pass-&-play and online P2P multiplayer. No signup.
How to Play zug zwang chess
Checkmate your opponent's king — face the search engine in three strengths, pass & play a friend on this device, or host a 5-letter room code and play anyone online. Tap a piece to light up its legal moves (dots = open squares, rings = captures), tap a destination to move, and use New game / Undo / Flip / Hint on the Play tab — the Moves tab holds your scoresheet and table chat. Watch the engine's live telemetry (depth, nodes, eval) to see exactly what it's calculating before it commits. Strategy tip: claim the center with your pawns and castle early — a safe, active rook is worth more than a quick grab of material.
