General controls
You can select cells by pressing on them. If you hold down your mouse and drag, you can
select several.
You can also press ctrl (or cmd on mac) and press on cells, which will then add them to your
selection.
You can also use your mouse arrows to move around the grid.
You can use the following shortcuts:
- z for numbers
- x for cornermarks
- c for centermarks
- v for colors
- b for notes
Numbers (z)
You input a number or a value, by selecting one or more cells and pressing a number from
0-9 or by pressing the numbers on the controller on the right. Press the backspace button
to remove the value
Cornermarks (x)
You create cornermarks by selecting a cell and pressing the numbers you want to mark. You
can use both the keyboard and the controls on the right. Press the backspace button to
remove the cornermarks
Centermarks (c)
You create centermarks by selecting a cell and pressing the numbers you want to mark. You
can use both the keyboard and the controls on the right. Press the backspace button to
remove the centermarks
Colors (v)
You add colors like you add numbers. The numbers 0-9 match the colors on the right, if you
want to use your keyboard instead. Press the backspace button to remove the color
Notes (b)
You can add notes as annotations to any cell to record information that cannot be
communicated using the standard pencil mark tools. Cells with with notes will display a
marker in the top right corner. Hovering over the marker will show the saved text. Press
the backspace button to remove the note
Scanner
The scanning tool can be used to help solve the puzzle by checking whether any cells are
restricted to a single digit due to the puzzle rules, or to quickly clean up pencil marks
after placing a digit. With Auto-scanning enabled, the scanner will run immediately every
time a digit is entered - editing pencil marks will not trigger a scan.
Press (s) to start or stop the scanner.
Press (a) to make a single step.
Press (h) to toggle highlighting on or off.
Press (t) to toggle Tuple highlighting on or off
Highlighting Mode
None: No additional cells are highlighted when the selected cells in the grid
are changed.
Seen: Highlight any cells which are seen by the currently selected cell. If
multiple cells are selected, only those cells seen by every cell in the selection are
highlighted.
Tuples: Highlight any cells which form a Tuple with the currently selected
cell.
Scanning Mode
Basic: The scanner will only use the basic rules of Sudoku when checking
available digits.
Advanced: The scanner can use the puzzle clues when checking available digits.
Extreme: The scanner can use global negative constraints when checking
available digits.
Options
Depending on the scanning mode and the puzzle constraints, you can choose which types
of clues can be used by the scanning algorithm.
Scanning Speed
Control how fast the scanner runs.
Walkthrough
The walkthrough is accessed by clicking the icon with the walking person below the
controller. When playing a game, you can follow along in the modal, or you can press the
button in the top right corner to open the walkthrough in a new tab. If you are creating
your own puzzle the same modal can be used to create a walkthrough.
If you don't want to open the modal everytime you want to add a step, you can use the "w"
shortcut, which will add the step for you. To add a description you still have to open the
modal, though.