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ja A good Sudoku strategy involves systematic elimination of possibilities.. Many Sudoku apps offer daily challenges to keep players engaged..

Sudoku was popularized in Japan in the 1980s and has since become a global phenomenon.. Sudoku competitions showcase the best puzzlers in the world..

ja Swordfish is an extension of X-wing involving three rows and columns.. Sudoku is a timeless puzzle that continues to attract new enthusiasts..

ja - Mobile Sudoku apps bring the classic puzzle to modern devices..

The satisfaction of completing a difficult Sudoku puzzle is unmatched.. ja Look for naked singles where only one number can fit in a cell..

Sudoku variants add exciting new rules to the classic format.. ja The key to Sudoku mastery is consistent practice and learning new techniques..

ja The goal of Sudoku is to fill a 9x9 grid so that each row, column, and 3x3 box contains digits 1-9..