Puzzle—IP in the i

A couple of new and interesting puzzles have been appearing recently in the UK daily newspaper the i from the Independent. These are Wijuko and ABC Logic, both of which require Sudoku-like thinking to solve and may be modeled using Integer Programming (IP). This article describes an example of each and develops IP models to generate solutions.

The URL for the i website is http://www.independent.co.uk/i/ although this does not at present give access to the puzzles. The full version of the paper, including puzzles, may be viewed via http://www.pressreader.com/uk/i-from-the-independent/TextView.