billablog

I like checking out the new user-submitted puzzles on  sudoku.coach , and while most of the time they're nothing spectacular, I'm always keeping an eye out for the user "h4nv" as he posts some very interesting grids with exotic moves to find if you're creative. In this article I'll be solving one of his recent puzzles.     

Read Part 1: Introduction to AIC     This is part 2 of my article on AIC. Originally it was part of the original article but it got so long that I felt it was detracting from the focus of the original, so I decided to split the article into 2. Please read part 1 if you're unfamiliar with the concept of AIC.

There is no Sudoku technique which has been as frequently mistreated and misunderstood as Alternating Inference Chains. Since  its introduction in 2006  it has become the most popular chaining method, but despite that, there are very few resources online that correctly detail the concept as originally expressed. Instead the majority repackage an earlier chaining technique called Nice Loops, changing a few terms here and there.