Here you can play a game against a computer program. On its top level it plays at the level of a fairly strong club player. You can also watch it play itself or get it to act as a referee in a game between two humans.

You can also play various odds games and endings here.

Click here to play a game where the computer has a king, bishops, knights and pawns.
Click here to play a game where the computer plays without its queen.
Click here to play a complete game.

Click here to practise the two rooks checkmate.
Click here to practise the king and queen checkmate.
Click here to practise the king and rook checkmate.

The chess engine on this website is p4wn, written by Douglas Bagnall. For further information please visit his website.
To use this program, click on the piece you want to move, then on the square you want to move to. If you want to castle make the king move and the computer will move the rook for you.
To play black click on 'swap'. To change levels click on 'computer level'. There are five levels: 0 is the easiest and 4 the hardest. To take back a move click on 'undo'.
To see the computer play itself click on 'white'. To get the computer to act as a referee click on 'black'. In either case the icon will toggle between 'human' and 'computer'.
If you want to promote to a piece other than a queen click on 'pawn becomes' until you see the piece you want.
If you find you can't play the move you want it's probably because you haven't noticed you're in check.