Object: Checkmate the opponent's Kings.
 
This chess version was inspired by Bobby Fisher's famous motto 'Onwards, onwards!'.
 
In the beginning of the game the pieces can only move forward or sideways, never backwards.
On reaching the eighth rank (for Black the first rank), this direction is reversed. To reverse again, the other border has to be reached again, and so on.
Since this is true for the king as well, after reversing direction one king can attack and checkmate the other king (from 'behind').
 
In Variant 2 of Onwards Chess, when moving to the eights rank the pieces revert to standard chess pieces, being able to move forwards AND backwards. They never change again.
 
Apart from this, the standard chess rules apply.
 
 
More freeware as well as real puzzles and games to be found at http://karl.kiwi.gen.nz/.