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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 although this does not at present give access to the puzzles. The full version of the paper, including puzzles, may be viewed via

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