You can click on the board to highlight sets of numbers:
Version 1.03
Welcome to my Sudoku 16 page. I have written this solver to show the extent
of the possible logical solutions that derive from the numbers on the
board. This has been written in Javascript/DHTML and uses a number
of interesting techniques.
NOTE: This in an archive page from 2005 and has not been developed since then.
Enter numbers here: (tabbing works well)
How to use this Solver
The small board is for entering your own puzzle. To try this out
I suggest you pick from the list of examples first. Clicking on
Take Step fills the empty squares with lists of the possible
number solutions for each square. If the solution is exactly one
number then the program will write that number in blue.
You can now use the << button to
step back one go. Toggling between Take Step
and << helps you see the changes.
You have to click Take Step continuously and you will see how
the solution for the whole board is derived. However, unless the
orginal problem is fairly simple the rules embedded in this solver
will not be enough to complete the problem. The human has to 'guess'
a square an see if this leads to a dead end.
If you get to that point start using the small board to enter
your own numbers to complete the puzzle. Keep clicking Take Step
to see how you entries fare. You can enter a new puzzle by clearing
the board.
If you have a comment or arguement about this puzzle do write to me at
andrew@syndicatedpuzzles.com.