Danger of fire spreading:

 

This chance is reduced by 1 for each firefighter in the square, or in a neighbouring square (non-diagonal neighbours only).

 

When the fire spreads, any squares that could have caught fire but didn't increase their danger by 1 in 6.

 

You lose if the fire spreads to any 13 squares, or to either of your bases. You win if the fire doesn't spread anywhere for 2 turns in a row.

 

Click on any square on the edge of the board to set up a base camp there.