Chess is the world's most played strategy game, and Chess Online brings a full-featured, free version to your browser. Play ranked games against opponents of your level from around the world, challenge friends in a private room, or train against an AI that scales from beginner to master strength. Choose blitz for fast three-minute games, rapid for ten-minute battles or classical for deep thinking. Every rule is enforced automatically, including castling, en passant, pawn promotion, threefold repetition and the fifty-move rule, so you can focus on the board. After each game, review your moves, see where the position turned, and track your rating over time. Legal move highlights, premoves, draw offers, resign, chat and spectating are built in. No download, no app, no account needed: open the page and play chess on desktop, tablet or phone.

How to Play Chess

1. White moves first. Players alternate moving one piece per turn.
2. Each piece moves differently: pawns forward, rooks in straight lines, bishops diagonally, queens both, knights in an L-shape, kings one square.
3. Capture by moving onto a square occupied by an enemy piece.
4. Special moves: castling (king and rook), en passant (pawn capture) and promotion (pawn reaching the last rank).
5. Check means the king is attacked and must be defended. Checkmate means it cannot escape, and the game is over.
6. Draws occur by stalemate, repetition, insufficient material, the fifty-move rule or agreement.

Game Modes and Features

• Ranked online matchmaking with Elo ratings
• Bullet, blitz, rapid and classical time controls
• Private rooms to play chess with friends
• AI opponents from beginner to master level
• Full rule enforcement: castling, en passant, promotion, repetition
• Legal move highlighting and premoves
• Post-game review and move list in algebraic notation
• Draw offers, resign, takeback requests
• Spectate live games and rematch
• Leaderboards, stats and achievements
• Works on any browser, mouse or touch

Chess Strategy Tips

• Control the center with pawns and pieces in the opening.
• Develop knights and bishops before moving the queen. Castle early.
• Do not move the same piece twice in the opening without a reason.
• Look for checks, captures and threats before every move, for both sides.
• In the endgame, activate your king and push passed pawns.