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Looking for a sensational Heavy / Hard Sudoku puzzle? (with a PDF file) 07-26-2019 part 2 of 2
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Hidden Pairs a.k.a. Hidden Matching Pairs – Solving a More Difficult Puzzle
Stunning Heavy / Hard Sudoku puzzle (with a PDF file) 06-28-2019 part 2 of 2
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Solve this Hard Sudoku puzzle in 16 minutes (with a PDF file) 04-12-2019 part 2 of 2
