The board contains 25 squares which you must all fill with numbers. You can drag a number from the side onto a square. Each number placed must go next to the previous number. That can be the square above, below, left or right as well as the four diagonal cells. Any number placed must be aligned with where it came from on the edge of the board. Numbers on the left or right must be placed along the rows. Numbers from the top and bottom must be placed vertical in their columns. The corners point diagonally across the board.