Challenge a powerfull chess computer to a game. You can select the difficulty level anywhere between Easy and Grandmaster, to match your chess skills. Chess engine strength can be changed during the game after any move. Increase the difficulty if the chess computer is too easy, or lower the level at any time, if the chess engine is crushing you on the chessboard. Press [New Game] button to play a new chess game online. Press [Switch Sides] if you want the chess computer to think of the next move for you. You are playing againt a powerful and open source chess engine — Stockfish 10. It is considered to be the top rated chess engine in the world. Play chess online vs computer!

The chess engine will think longer on higher levels, so please be patient. The playing strength also depends on the speed of your device. Using a faster device (desktop computer) will result in a stronger chess opponent, as the chess engine will be able to analyse more positions within a given thinking time. Slower devices (such as mobile phones) will be easier to defeat.