set of numbers. The number that is selected when the mouse button goes up
will be input into the cell.
The game has two modes: Setup and play. Cells that are entered in
setup mode are protected in play mode.
The solutionator uses a brute-force algorithm that is guaranteed to
solve any puzzle that has a solution, but it is not very clever in how
it goes about it. It can take a long time to find a solution, but it
does not lock up the browser. This is a demonstration of eteration.