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The Definitive Guide to sudoku hard - hard sudoku

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Quads tend to be rarer, they usually’re fewer helpful in a way since they don’t let you slender down a large number of candidates unexpectedly, however, if you notice a single, it’s truly worth investigating. Solving single squares also can change quads into triples or pairs, so don’t forget about https://howardb108atj5.sasugawiki.com/user

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