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?
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?
This. There aren’t multiple solutions because their orientation is set by the one given number. Intentionally so.