help page
Puzzle handling buttons
Press this button if you want the program to generate a new puzzle. After pressing it, you will be able to select the level of difficulty that suits you for the moment. And there are three levels to choose from: easy, medium and expert. It might take a few seconds for the program to generate the new puzzle, so please be patient.
If you want to enter a puzzle from a newspaper or from some other source, you can use this button. When the puzzle you have entered is complete, press the "Setup complete" "button below. The program will check the puzzle and rate its level of difficulty.
For opening a puzzle that has been previously saved, use this button. It will open up a dialog window where you can scroll the list of your saved puzzles and select which one you want to open.
When you want to save your puzzle, you can press this button. If you have saved it earlier, you will only get a note on the message line that it has been saved. But if it hasn't been saved before, a popup window will appear in which you can name your puzzle.
This button is for saving a previously saved puzzle under a different name.
Navigation buttons
If you want to start the puzzle from the beginning again press the restart button. Please note that the solving history is not inkluded if you save the puzzle, so you can only restart it from where you were when loading it again.
You can step backwards and undo all moves made from when the puzzle was created or loaded. However, some reductions of candidates in List mode might be lost and have to be made again.
After you have stepped backwards with one of the buttons above, you can move forwards again with this button. The restrictions concerning candidates in List mode are the same as for the undo button.
This button of course takes you to the last move again, if you have used the restart or undo buttons.
Help buttons
Here you can get help with the most basic solving method when starting a puzzle. A number in three boxes horizontally must be in different rows in these boxes, and in three boxes vertically it must of course be in different columns. Note that all help buttons only show you the correct cell value with a different color - you have to enter the number yourself with the corresponding number button to make it stick.
This button will help you with the not so difficult but very time consuming method of checking all rows to see if a number can be in one cell only - because it already exists in crossing columns or in boxes.
If you want help with checking all columns to see if a number can be in one cell only - because it already exists in crossing rows or in boxes.
Get help with checking all boxes to see if there is a number that can be in one cell only - because it is already set in crossing rows and columns
A very tiring method is to check all cells for having only one possible number because all other numbers are set in crossing rows and columns or in the same box. Note that this is very obvious and easy to spot in List mode
Mode buttons
This button toggles between List mode and Normal mode. Only easier puzzles can be solved in Normal mode, and all the more complex solving methods are built on reducing the candidate lists in List mode. There are also things that are easy to spot in List mode, but very time consuming to find in Normal mode. When you press a number button, the corresponding number is removed or set as a candidate for that cell. Note:when pressing the number button for the last remaining candidate in a cell, that number will be set for that cell. Also note that setting or removing candidates are not saved in the moves history, which you can step forwards and backwards through with the navigation buttons.
"Highlight numbers" is a special mode you can use in both Normal and List modes. It will show you all the cells that has the selected number in a different color. The number is chosen with the number buttons, and it will create patterns that makes it easier to spot where a number can be set or where a candidate may be removed. In List mode it will only show candidates with the selected number. Note that the blank number button is not visible when you are in this mode, and you can leave it either by pressing the button again or by selecting a cell in the board.
Solution buttons
When you're stuck and need help with a single cell, make sure that it is selected before you press this button. It will show you the correct number for the selected cell.
And when you have completely given up all hope of solving the puzzle, you can always get the solution here.
List mode reduce buttons
In List mode the goal is to reduce the number of cell candidates - hopefully to only one. But when you have run out of ideas and still have quite a few candidates left, you can use these buttons. From left to right they provide easier to more complex methods of reducing candidates. Still - they can't handle all of the most difficult puzzles.
Reduction strategies info
When you have removed and maybe added several cell candidates, you might not be sure if the lists are still valid. Then you can use this button to rebuild all of the lists.