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ja Sudoku tournaments test both speed and accuracy of participants.. Sudoku can be enjoyed anywhere without special equipment..

Unique rectangles can help eliminate certain candidates.. Playing Sudoku regularly can improve your logical thinking and concentration skills..

ja Start with the easiest cells that have only one possible number.. The global Sudoku championship brings together the worlds best solvers..

ja - Digital Sudoku apps offer features like hints, error checking, and auto-notes..

Sudoku was popularized in Japan in the 1980s and has since become a global phenomenon.. ja Sudoku puzzles can be found in newspapers, magazines, and puzzle books..

The meditative quality of Sudoku helps many people relax and unwind.. ja Trust the logic and avoid guessing whenever possible..

ja The pointing pairs technique helps identify numbers restricted to specific cells..