Ratio – the new puzzle for iPhone and iPad: On a 4x3 board your aim is it to swap the position of two stones. It gets tricky though - their possible moves depend on up to 8 smaller stones that change position after every move. That way the puzzle stays fascinating and requires a logical approach. The first levels are relatively easy, but the higher levels quickly become more challenging. And if you ever solve the last one, you can call yourself a genius!