To move a piece, use the mouse or the arrow keys to move the cursor to the
piece you want to select. Highlight the piece by clicking the mouse button
or press [ENTER]. Move the cursor to the destination square and click the
mouse or press [ENTER]. Dropping pieces works the same way.

If the move is illegal, the piece will stay in its original square and
be de-selected. If you have the option to promote the piece, the computer
will ask you. The computer automatically removes captured pieces and
display them in your hand.\
