Solving Every Sudoku Puzzle
by 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
Python for Lisp Programmers
This is a brief introduction to Python for Lisp programmers. (Although it wasn't my intent, Python programers have told me this page has helped them learn Lisp.) Basically, Python can be seen as a dialect of Lisp with "traditional" syntax (what Lisp people call "infix" or "m-lisp" syntax). One message on comp.lang.python said "I never understood why LISP was a good idea until I started playing wit
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Design Patterns in Dynamic Programming
