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And that makes 200! Beginner, Intermediate, and Advanced solutions. I think I channeled @patrick_digan on this one. Could have made the standard macro iterative to reduce number of tools, but runs fast and works as is. I still prefer the "brain and pencil" method, but nice to be able to create a workflow of how my brain solves Sudoku puzzles.
I stuck with the Beginner solution which I solved by using the RegEx tool twice (attached workflow)
If I wished to completely solve the Sudoku, I would study the solution created by my colleague Fred Koenders. He described it in a blog some time ago (link in Dutch: https://infotopics.nl/blog/2018/07/20/sudoku-solver-met-alteryx/)