Kakuro

In this game there will be a grid of randomly placed blank squares, a series of squares connected horizontally or vertically form a group, before each group is a block with a number on it. The object of this game is to fill in the squares with numbers from 1 to 9 so that the numbers in the groups do not repeat and that the numbers sum up to the number before the group. The faster you finish the game, the higher your score. When you are stuck, you