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Sudoku hard - hard sudoku Things To Know Before You Buy

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Quads are much rarer, and they’re a lot less useful in a method due to the fact they don’t let you slim down a lot of candidates all at once, but if you see a single, it’s worthy of investigating. Solving single squares also can switch quads into triples or https://eddiez837mfb5.bligblogging.com/profile

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