Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
My mistake
Use spoiler flag next time please, your post was visible in the homepage.
This comment is hidden because it contains spoiler information about the solution
You are right. When I did these puzzles, years ago, I was following a style of brevity. The recursive call saves a line.
Does the recursive call to sudoku(P) actually make this any quicker than if you use the same logical code (as i did) and just update the puzzle and iterate through it again, with say, a while solved = False construction? It doesn't seem like the "recursion" in this case is actually cutting out much labor?