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Mon, 16 Sep 2019

What are the rules of Killer Sudoku?

Killer sudoku has all the rules of sudoku, and some more besides!

All the rows, columns and boxes must contain the numbers from 1 - 9 once and once only. So far, just like sudoku.

However, the grid is split up into small regions, for instance three cells may total 9. You must obey all these sub-totals for each box in your solved puzzle. And within in each of these sets of cells, you must not repeat a number.

And that's it - using these rules you should be able to deduce the solution to a valid killer sudoku puzzle!


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