The board is generated randomly. The number in each cell is the cell's "temperature."
The goal is to minimize the number of "runaway" 7s on the board after each turn. A runaway 7 will explode.
A turn is played by clicking a cell on the board;
If a cell had a temperature of 7 when the turn was played and the cell is not "cooled down" during the turn, the 7 will explode, and a point will be added to the score.
Keeping a low score:moves ratio is ideal. Scoring above 10 means you lose.
When you click on a cell, it will "cool down" the value in the cell a certain amount:
All 4 cells diagonal from the cell you choose to cool will also have their values affected when a turn is played. Use the compass (the box showing + and -) to determine how:
If the compass points off the edge of the board, the affected cell will be the cell wrapped around the other side. For instance, if up-right points out-of-bounds to the right, the board will target the cell one row up and all the way to the left on the board.
Cells not directly affected by the turn by clicking or by virtue of diagonality may still see a temperature change each turn:
Play until you score 10. More moves means a smaller score-to-moves ratio. The goal is to end the game on as small a ratio as possible!