Yuh play, these words from your mouth since you started playing the game really will come out. Yuh plays your game calmly at first, but as it progresses, so you can say the limit so no difficulty stems from the fact that it is an ongoing game. The aim of the game is required to reach the point of making move the number on each box. No less, no more. You need to work out the number of boxes and increasing the difficulty.