CalcuDoku Interactive

CalcuDoku puzzles can be played interactively on the computer, offering many features and advantages compared to pencil and paper. This section explains everything about how to play CalcuDoku on the computer. If you are not yet familiar with the puzzle rules, please go to CalcuDoku rules.

Placing and deleting numbers

CalcuDoku interactive is played by placing numbers in a grid. Click mouse on the desired square to open dial pad and then click on the desired number. To remove a number, repeat the above using X at the bottom of the dial pad. Numbers can also be placed by pointing mouse on the desired square and then typing with the keyboard.

Using pencilmarks

CalcuDoku interactive also supports pencilmarks to help solve hard puzzles. Click mouse on the desired pencilmark square to open dial pad and then click on the desired number. To remove a pencilmark, repeat the above using X at the bottom of the dial pad. Pencilmarks can also be placed by pointing mouse on the desired pencilmark square and then typing with the keyboard.

Toolbar

All game functions are accessed through the toolbar. For some toolbar buttons, keyboard shortcut keys are also available as listed below. Toolbar may be positioned horizontally or vertically using the rotate button on the left edge, and relocated anywhere in the game by dragging its frame.

Zoom in

Enlarge small puzzles for best viewing on your screen.

Zoom out

Reduce large puzzles for best fit on your screen.

Undo (Keyboard: U)

Go back as many steps in the game as you want.

Redo (Keyboard: R)

Go forward after using Undo as many steps as you want.

Restart puzzle

Restart puzzle to solve from the beginning.

Check puzzle (Keyboard: C)

Check all placed numbers for errors.

Clear all pencilmarks

Clear all pencilmarks placed in the grid.

Progress

Show elapsed solving time.

Show solution

Show solution of the puzzle. Using this button will also end the game.

Preferences

Open Preferences dialog box. New preferences will be automatically saved on the computer.

Show errors and conflicts: Check this box to automatically show errors and conflicting number instances during the game. A conflicting number means it already exists in the same row or column.
Show math combinations: Check this box to show all allowed math combinations when mouse is pointing at a block. Math combinations list will appear under the puzzle.
Show remainder: Check this box to show math remainder in the block which the mouse is pointing at.
Auto complete: Check this box to auto complete rows, columns and blocks when only one number is missing.
Sound on: Check this box to turn sound on.

About

Open About dialog box to see puzzle size, difficulty, ID, title and other information.

Help

Open CalcuDoku Interactive page you are reading now.

Print options

Open Print dialog box. New print options will be automatically saved on the computer.

Print

Puzzle: Select to print puzzle.
Solution: Select to print solution.
Current state: Select to print current solution state.

Scaling

Preferred image scale: Reduce or enlarge printout.
Attempt to reduce to page: Check this box to automatically fit large puzzles on a single page. When this box is unchecked, large puzzles will print in multiple pages according to selected scaling.
Attempt to enlarge to page: Check this box to automatically enlarge small puzzles to fit on a whole page. When this box is unchecked, small puzzles will print according to selected scaling.
Select optimal orientation: Check this box to automatically select puzzle orientation.