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Top Nine Most Often Used Strategies for Solving Expert Sudoku Puzzles - YouTube
can someone guide me to solve this sudoku? I normally used to play hard level sudoku and finish it with 6min, but first time i tried an expert level one and stuck
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How to Solve Sudoku Puzzles (beginner and Advanced) : 22 Steps (with Pictures) - Instructables
How can I learn to play sudoku at an expert level? Help me! : r/sudoku