Games

This is a game for two players.

The object of the game:

Be the first person to make a square.

Rules:

Players take turns to choose a dot on the grid.
The winner is the first player to choose four dots that can be joined to form a square.
Player one is blue and player two is red.

Here is a picture showing a completed game won by blue:

Squares can be any size, and can be tilted like the one in the picture.

Play the game a few times.
Once you have a strategy, you could try playing on different sized grids.

Source: nrich.maths.org/solvingtogether