Futoshiki

If you like Sudoku, then you'll love Futoshiki. Futoshiki is another popular Japanese number puzzle game. Your aim is to place the numbers one through five in each row and column so that they don't repeat themselves. The numbers must also respect the relational signs placed between some cells. The game includes a generator that offers the player three difficulty levels, from easy to medium to hard. For each puzzle generated, only a single solution is guaranteed.