Andrew Stuart’s app is extremely popular and uses that algorithm. His solver is truly amazing and in a class of it’s own. https://www.sudokuwiki.org/sudoku.htm

Andrew Stuart’s app is extremely popular and uses that algorithm. His solver is truly amazing and in a class of it’s own. https://www.sudokuwiki.org/sudoku.htm https://www.sudokuwiki.org/sudoku.htm This site is the place where I learned how deep sudoku goes. I was rather naive before I read about the X-wing, Jellyfish, Medusa, and Death Blossom…