The New Sudoku Players' Forum

[Diane]

Can anyone offer a solution to this puzzle using logic? After I filled in every square that could only be one #, I was left with many squares that could be at least 2 numbers. The only way I could complete the puzzle was to take a guess on one of the 2-choice squares and continue until I hit a road block, which I didn't. I don't like guessing and would rather use logic. The puzzle begins with 5-8-9-8-3.

[simes]

can you post the original puzzle, and perhaps how far you got?

[Diane]

Here is the puzzle. Difficulty level hard. It is impossible to remember how far I got before guessing, because the whole thing is filled in now.

--5|---|8-9
8--|---|3-2
---|3-6|---

--1|92-|--7
-9-|---|-5-
4--|-63|9--

---|4-1|---
6-8|---|--1
1-3|---|5--

[simes]

Sorry, but I can only think that you made an error or missed something. The puzzle doesn't require guessing, and doesn't need any technique beyond "sole candidate" and "unique candidate".