Futoshiki is a simple deduction puzzle, it is played on a board from sizes 4x4 to 9x9, it is very similar to Sudoku. The objective is to fill the cells with numbers between 1 and the maximum number of the board without repeating them in rows or columns. Between some cells there are arrows, indicating that one of them is greater than the other. * Difficulties The game has 4 difficulties: Trivial, Easy, Hard and Extreme. * Sizes Each difficulty has 6 possible sizes: 4x4, 5x5, 6x6, 7x7, 8x8 and