Is there any way to find errors in a sudoku puzzle instead of starting over?

Question

If I suddenly find that in order to make logic work I have to put 2 of the same numbers on the same row, box, etc, then there's got to be an error somewhere. But I have no clue where the error is, I don't know which numbers are wrong. I just have to start over again and hopefully make no errors this time around.

I guess I'm careless or something, it seems out of 10 games, like half of them I have to do twice to get it correct.

Answer 1

Hi JC



Ok, so the puzzle is not completed yet when you run into problems? There are three possible reasons.



Start by checking each row - from top to bottom - that you haven't duplicated any numbers by accident. Once completed, do the same with each column and each 3x3 box. Errors happen ... we know :-)



Second possibility is that you somewhere along the line either took a guess or entered a value without being 100% sure about it. Then towards the end things start going pear-shape. Sudoku can be solved without the need to guess. Learn the advanced techniques if you don't know them yet.



Sadly enough, the last possible reason is something which not everyone is aware of and is difficult to tell in advance. Not all puzzles are created equally and some have multiple solutions! Yes, as absurd as that may sound, the creator never went to the trouble to check that the puzzle had only ONE solution. What then happens is - when you are trying to do a Sudoku - you end up mixing two or more solutions for the same puzzle, unaware of it obviously.



We create Sudoku Puzzles from scratch BUT check their validity before they are presented to you, the Sudoku Player.



Enjoy!

Answer 2

Sudoku Absurd

Answer 3

Use a sudoku app. Enter the given numbers and start the puzzle. Now the app should tell you whether a new number is wrong. You realize a mistake because a number doesn't fit in row, column, and square. Now you can use the 'wrong number' feature to eliminate the discrepancies. Make the corrections, and continue the puzzle on paper.

Answer 4

go back over the puzzle you messed up on and find other spots where you might have accidently doubled up on a number or go through and make sure you put the rite numbers in the rite spots

Answer 5

Interesting discussion!

Answer 6

Interested in this