## Noughts and Crosses

**Players: **Two - **Also known as: **Tic-tac-toe

Players take turns in marking squares on a 3 x 3 grid. The first player to get three squares in a row wins.

### Description

This is probably the best known pencil and paper game.

The game is played on a 3 x 3 grid, typically created by drawing two horizontal lines and two vertical lines on a piece of paper:

One player is 'O' and the other is 'X'. The players take turns in drawing their symbol in one of the cells. The first player to make a line of three of their symbol horizontally, vertically, or diagonally wins.

If both players play perfectly the outcome is always a draw, but with inexperienced players the game is just complex enough to make the game interesting.

### Example

For example, the following game shows how the first player can force a win by starting in the centre square if the second player is foolish enough to reply on the edge: