How to play?

Click on a piece to pick it up, this piece is now in-hand.
With a pice in-hand you may click on another piece to capture it or you may click on an empty square to place the piece down.
In the case of en-passant when a piece is in-hand click on the pawn you need to capture and place on the appropriate square.
When you want to castle move the king two squares then move the rook. Warning: do not click on you own pieces with a piece in-hand.