I came across this post about a puzzle called han’en that claims to combine elements of sudoku and kakuro. Currently, the blog that this post comes from is dedicated entirely to the puzzle.
The puzzle is made up of a six by six with some numbers filled in. At the end of each row and column is the sum for that row or column. Each digit may only appear four times so that all of the numbers in the grid add up to 180 and this is where the puzzle get’s it’s name. Han’en is Japanese for semicircle, and a semicircular arc has 180 degrees. All of the normal kakuro rules apply. No digit can be used twice in the same sum. Only the digits 1-9 can be used. Essentially, it’s a 6X6 square kakuro with the added rule that each digit must be used only four times. There’s also a variation called perfect han’en in which each row and column sums to 30.
Tags: hanen,kakuro,puzzles,sudoku
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