by: GreenChileStew • 7
This is an aid for Sudoku puzzles that automatically lists the possible values remaining all cells that haven't been filled in. Use the assistant instead of scribbling and erasing on paper (or when that method isn't even available).
Additionally, the assistant has a solver function that will recursively fill in any cell that:
1) Has only one possible value remaining.
2) Is the only cell in a row/column/box that can contain a particular value.
The solver will actually complete low-difficulty puzzles and remove most of the dull busywork from harder puzzles.