Noughts And Crosses

The beauty of this puzzle from Japan is that the puzzle can be visualised from the name alone. The rules are simple.

The only downside is that it can be hard to pitch the puzzle at an enjoyable level. The simplest puzzles are a matter of routine, whereas hard puzzles can require the solver to think many steps ahead. At a medium level of difficulty, with a limited amount of forward thinking, the puzzle is enjoyable.

Instructions


Put a nought (0) or a cross (X) in each cell so that there are no lines of three (000s or XXXs) in any direction.