Your seek has been accepted (or you have accepted someone's seek) and the
chess board immediately appears on your screen.
Your clock will be highlighted when it is your move. To move your pieces, simply
click and drag your chess piece from where it is to where you want it to be.
Castling is done by moving your king two spaces to its destination square.
Advanced Topic: takeback
You can offer a takeback to your
opponent. This will allow your opponent to undo the move he just made. You can
only take back one of your own moves if your opponent offers a takeback to you.
Both your opponent's and your own moves will be displayed (using algebraic
notation) in the white area to the right of the board.