Coloring Sudoku Squares [Page 11 of 15])

   

To keep track of squares on paper and pencil is easy, you just make a mark on a square and rub it out when no longer needed. Sudoku Dragon offers color marking that lets you easily put a temporary mark on a square. There is a command to quickly clear coloring from all squares in one go.

The colors are added from the right mouse menu or the Edit menu or, using the keyboard SHIFT+Function key.

In this example screenshot, coloring has been used to identify squares that can take a '5'. Alternate pairs have been marked with different square colors. Starting with orange square Bg this is paired to turquoise square Hg. Only one of these two squares can be the '5' in column g. Next Hg is paired to orange square Ii as a pair in region Gg. This square is in turn paired with turquoise square If. In addition there is another pair Bd (blue) and Fd (red) in column d. Having marked the alternate pairs it is now evident that square Bf (lime green) can not take a '5' as it is in the same column as a turquoise square and the same row as an orange square. If the orange squares are correct then Bf can not take a '5' but nor can it is the turquoise squares are correct. As either orange or turquoise must be correct that proves it!.

You can use coloring just to remember particular interesting squares, in conjuntion with the square annotation facility it is a very powerful facility.

Give the SudokuDragon a free 23 day trial by visiting our download page.
One of the few puzzle solvers that gives you color marking.

• Tour Guide Introduction
• Generating a new Puzzle
• The square allocation list
• All forms of Sudoku
• Puzzle hints
• Annotating individual squares
• Explaining possible square assignments
• Showing possible square assignments
• Looking at possibilities
• Automatic allocation for 'easy' squares
• Marking Sudoku squares
• Contribute your puzzle
• Larger Sudoku grid sizes
• League Table
• Change grid appearance

Copyright © 2005-2011 Sudoku Dragon