Talk:Puzzles/Logic puzzles/Sudoku/9 by 9/Approach to solutions

The approach to solving described here was written quickly and could definitely be improved. It doesn't describe, really, the purpose of using the dots and how it works in practice. Starting out with just two dots for one number per square means that if you identify a cell number, and that cell contains a dot for another number, you can immediately mark the cell with the other dot as being that number. It is also very easy to see if there are two cells with the same two-dot marks.

The dots are small and don't interfere with writing the cell numbers as they are identified. I probably wouldn't use them if using a pencil. I used to use a pencil and did write the small numbers at that point.

However, it's faster to make a dot, and easier to write something else in if needed. --Abd (talk) 01:49, 17 September 2010 (UTC)
 * I use the dot-approach when I solve Sudokus, though I don't use any of the other notations described here. Though I came up with the notation myself, I find it gratifying to know that I'm not the ony one to have come up with it. I find it easy to remember where each one goes because the dots are laid out the same as a phone's keypad.  I imagine a drawing would be really useful for illustrating the technique(s). --Jomegat (talk) 02:55, 17 September 2010 (UTC)