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And it doesn't disappoint. Simon takes a look at very difficult killer sudoku (rated deadly by the times on 6 april 18). Simon explains how to solve this deadlyrated puzzle from 3 february.
Simon solves this viewerrequested puzzle. Introduces you to a variant of sudoku called killer and shows basic techniques solve these puzzles. Simon solves the deadly killer sudoku from times on 9 sept 2017.
Here are some of the techniques you need to tackle toughest this sort sudoku.