I speed through beginner minutes per puzzle, medium it varies but takes a little longer than beginner but no where as long as hard level. Then there is hard level and my time varies.
The point of this post is I am looking for input on solving that isn't confusing/overwhelming so I did a Google search and found this article that I printed and started reading but as soon as I hit tip #1 "Sole Candidate" I see an issue with this.
When a specific cell can only contain a single number, that number is a "sole candidate". This happens whenever all other numbers but the candidate number exists in either the current block, column or row. In this example, the red cell can only contain the number 5, as the other eight numbers have all been used in the related block, column and row.
But the fact is I don't agree that the #5 is obvious. While the #5 is the obvious missing number, it being in that red block is NOT the obvious choice. And because of this issue I have right off the bat with this article I am wondering if I am wasting my time on this article. For my method I would need other blocks filled or/and the #5 in other areas to truly say yes, the #5 should be in box....
Thoughts? And please try to be clear for I read a lot of Sudoku explanations that have me saying out-loud WHAT???