Tic Tac Toe and its variations have been played for thousands of years, even as far back as BC, and it still retains a good bit of fun, especially for children. It’s simple, easy to understand ...

Impossible Tic Tac Toe is the hardest version of the game around, played against an opponent leagues smarter than your little sibling. It knows every trick in the book, making it impossible to ...

Although tic-tac-toe is a small game, the solution requires a sizable dose of deduction. To aid discussion in the comments, let’s number the squares like a telephone. Graphic: Jack Murtagh ...