[kazinator]

> frowned-upon by the Sudoku community

{citation-needed}

What community, and does it include mathematicians and logicians?

Sudoku puzzles that are solvable without guessing must be generated in a way that this is assured.

There is also an understanding that Sudoku puzzles should have exactly one solution.

It's possible for Sudoku puzzles to have a unique solution, yet be impossible to solve without guessing and backtracking. The process of deduction reaches a point at which it cannot be deduced what value to fill next into what square. It is narrowed down to several possibilities, which have to be pursued in parallel; e.g with backtracking. You follow all the paths, and discard them, returning to the divergent point, whenever a contradiction is reached: violation of the Sudoku constraints.

You can't just frown upon some solution method which is inescapable.