dailysudoku.com

[dagoldlin]

I am new to Sudoku and note that the puzzles are graded. On what factors is this grading based? (I can see that number of filled-in squares would be one.)

I like puzzles that can be solved by logic alone. Is it possible in Sudoku to have to try one of two choices, go through a number of steps only to get blocked, then have to go back to the other choice? Thanks for your help.

[David Bryant]

[dagoldlin]

That was most helpful. I'll check out the other threads. Thanks so much!

[chelsea]

I've found that going to the least-likely 'empty space' will yield the best results -- I logically think that the center squares will be the place to fill in blanks. But -- putting my pen over a #7 square in the top right might give me more info, such as, that square HAS TO be either 4 or 7. Ergo, the one below that HAS TO be either 6 or 9 is eliminated in a vertical scan of the available numbers.
I adore Sudoko for the same reason that I adore Cross Sums -- I've been told I'm a math idiot for most of my life, but I KNOW how Cross Sums work, and it makes logical sense to my English-trained brain. Just as word progressions 'make sense' in English, so does the fact that a three-block "23" in Cross Sums MUST contain 6/8/9. A two-block "3" must contain 1/2; a two-block "4" must contain 1/3, ergo when a 3 and a 4 cross -- the "1" must go in the block where they meet.
I use that same logic to solve Sudoku.
GAMES magazine has published them for years under a different name, but nobody paid much attention.
I now have co-workers sidling up to me saying, "I hear YOU know how to Sudoku, can you help me with..."
It's great.

[alanr555]

[someone_somewhere]

Hi,