If you haven't already seen it, check out Donald Knuth's Dancing Links algorithm for solving sudoku. Here's a good overview and intro (that includes a link to t

If you haven't already seen it, check out Donald Knuth's Dancing Links algorithm for solving sudoku. Here's a good overview and intro (that includes a link to the paper). https://www.kevinhooke.com/2019/01/22/revisiting-donald-knuths-algorithm-x-and-dancing-links-to-solve-sudoku-puzzles/ https://www.kevinhooke.com/2019/01/22/revisiting-donald-knut...