Striking similarity to this article, with a lot of the preprocessing steps missing. https://medium.com/@neshpatel/solving-sudoku-part-ii-9a7019d196a2 https://m

Striking similarity to this article, with a lot of the preprocessing steps missing. https://medium.com/@neshpatel/solving-sudoku-part-ii-9a7019d196a2 https://medium.com/@neshpatel/solving-sudoku-part-ii-9a7019d...