### Traffic Lights

The game uses a 3x3 square board. 2 players take turns to play, either placing a red on an empty square, or changing a red to orange, or orange to green. The player who forms 3 of 1 colour in a line wins.

### Achi

This game for two players comes from Ghana. However, stones that were marked for this game in the third century AD have been found near Hadrian's Wall in Northern England.

### Yih or Luk Tsut K'i or Three Men's Morris

Some puzzles requiring no knowledge of knot theory, just a careful inspection of the patterns. A glimpse of the classification of knots and a little about prime knots, crossing numbers and knot arithmetic.

# First Connect Three

##### Stage: 2 and 3 Challenge Level:

Are some numbers part of more lines of three than others? This might affect whether we aim for them or not.
How can you get $1$ by throwing the two dice? How many ways are there altogether?
How can you get $12$ by throwing two dice?
It might be useful to look at all the numbers on the grid in turn in this way.