Jigsaw Challenge is a sliding puzzle with 3 different play options.
3x3 fields, 3x4 field and 4x4 fields(classic 15 puzzle)
With different images the variety is almost unlimited.
The game contais always an empty piece. Slide a piece towords the empty piece and try to finish the puzzle. Te game end with the empty piece in the lower right corner and the other pieces on the correct place!
Find more info on sliding puzzles on wikipedia.