How To Play
The goal is to fill in the empty cells, one number in each, so that each
column, row, and region contains the numbers 1–9 exactly once. Each number in
the solution therefore occurs only once in each of three "directions". The
rules are simple, and the best way to learn is to play. So, click "New" and
start placing numbers.
The progress bar below the board indicates how difficult a puzzle is. The user is encouraged to
keep clicking "New" until a puzzle is created that is the desired difficulty. The number of
available moves, shown below the difficulty bar, is another indication of difficulty. It lets you
know how many moves are current on the board, the more moves on the board the easier they will be to find.