My understanding is a valid sudoku should have 1 unique solution. But in this one I just finished, the circled numbers seem to be interchangeable. Am I missing something?
Beginner Sudoku question
My understanding is a valid sudoku should have 1 unique solution. But in this one I just finished, the circled numbers seem to be interchangeable. Am I missing something?
5 Comments
owenfromcanada@lemmy.world · 24 pts · 2y
Are the bolded numbers the starting numbers? In that case, one of those circled numbers was a starting value, and swapping them would essentially result in a "different" puzzle.
Waldowal@lemmy.world · 8 pts · 2y
Ok, yes, this explains it. Thank you
kryptonianCodeMonkey@lemmy.world · 2 pts · 2y
This. There aren't multiple solutions because their orientation is set by the one given number. Intentionally so.
bigbangfieri@lemmy.world · 4 pts · 2y
looks like the 9 in the bottom box is a pre-filled number, so couldn't be swapped
BowserBasher@lemmy.world · 2 pts · 2y
I’ve had a couple of those in the past where there is something like this. I think it’s a low chance but it is perfectly possible for it to happen.
AFKBRBChocolate@lemmy.world · 1 pts · 2y