Is there any rule to check sudoku under generation?

giotto

Hi!

I've created my code witch creates random fully filled grids. But I would like to create sudoku grid (unique solution).

I searched the forum to answer my question, but unfortunately I didn't find a good answer.

My question is the following:

Is there any rule to follow under showing/hiding numbers in the grid to get a unique solution OR I have to generate a grid and when it's done, check that and "fix it" if necessary?

thx, giotto

daj95376 · Posted: Tue Oct 24, 2006 2:18 am Post subject:

There are many identical posts (and answers) to your question in the forum. You need to search a little harder.

Bottom line: You'll need an enbedded solver that can tell you if a puzzle has zero, one, or multiple solutions as you hide cell values. You'll also need backtracking logic in case you run into a corner and decide there are too many clues still remaining. Don't even dare think about asking how to control puzzle difficulty at the same time. There's tons of discussion in the forum on that topic alone.

giotto · Posted: Tue Oct 24, 2006 9:53 am Post subject:

ok, thx

This forum is a little bit "untransparency"....

Witch is the best topic in this subject?

elliot · Posted: Mon Oct 30, 2006 11:14 pm Post subject:

the topic is good sudoku!!!