Play sound after each move
When it is checked, you hear a wave file played after you or the opponent
makes a move. If there is a check after the move, a check wave file is
played. If your move is illegal, a error wave file is played. Note: If you have
no speaker, you will not hear the sound.
Highlight last move
When it is checked, the moved piece is highlighted by a frame after either
player make a move.
Display coordinate text on board
When it is checked, each square has text to mark its position. The text is
as follows:
Display icon on attacked piece
When it is checked, there is a small icon displayed on each piece which is
attacked by other side.
For example, in the following figure, the black pawn is attacked by red cannon.