To move, left mouse click your piece and wait for 'Move'.

Then click on the square you want to move to.

Illegal moves will not work.

Castling is allowed, including under Check.

Move King to appropriate square, rook will be placed in appropriate square by computer.

White moves first. Uncheck CPU color before changing color or CPU will play itself.

Check both CPU boxes to have computer play itself.

Uncheck both boxes to play a friend.