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Sudoku - 80 Puzzles to Tune-Up Your Brain: 2 Levels of Difficulty - Easy & Medium: Books, Ferneva: 9781543031355: Amazon.com: Books
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Sudoku Food for the Brain: 1000+ Sudoku Puzzles for Adults | Easy to Hard | 7 Difficulty Levels | With Tutorials, Warm-ups, Step-by-step Solutions, Answers at the Back: TASSE, SENIOR: 9798390612606: Amazon.com: Books
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why is 4 wrong here? i dont see any 4s that could rule out it being there, and whenever i try looking up the rules to sudoku it wont tell me why
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