Object: Capture or checkmate the opponent's King.
 
You may pass a move by clicking the 'PASS' bar. The moves can be used any time later as additional partial moves.
Blue indicators at the border of the chess board will tell you how many spare partial moves you have. You can save up to eight partial moves. (In the other three variants, you san save a maximum of one, two or three turns.)
To pass a partial move, click the lightning sign at the tool bar.
 
Apart from this, the standard chess rules apply.
 
 
More freeware as well as real puzzles and games at my home page: http://karl.kiwi.gen.nz/.