Solving Every Sudoku Puzzleby Peter Norvig Note: This page is the original 2006 essay; an updated Python 3 Jupyter notebook is available here and should probably be read instead of this page. In this essay I tackle the problem of solving every Sudoku puzzle. It turns out to be quite easy (about one page of code for the main idea and two pages for embellishments) using two ideas: constraint propagation and search. Sudoku Not
