A Sudoku a day keeps the doctor away - Sudoku Technique: Cross-Hatching As below puzzle, we select 3 and draw lines and find out the left-center 3x3 subgrid only 1 box (r6c2)
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Sudoku A Day 2023: 366 Dated Sudoku Puzzles For Adults Easy to Hard, Large Print, Sudoku Calendar 2023 Page A Day: Publishing, Smart Monkey: 9798351824352: Amazon.com: Books
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