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Tutorial 58. Hard sudoku puzzle with lots of techniques.
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Tutorial #50 Solving a hard puzzle from the beginning to the end
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Hard Sudoku Puzzle Made Easy: Solve With Me
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A difficult puzzle solved from beginnig to end. Lots to learn.Tutorial #56.
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How to solve very difficult sudoku puzzles
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Tutorial #80 A difficult sudoku puzzle made easy
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Hidden triples - a Sudoku technique for beginners
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Х-wing - an Advanced Sudoku technique
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Hard sudoku puzzle with sudoku solving tricks. Expert sudoku solved. How to solve a Hard Sudoku.
Hard Sudokus Seem Impossible? This Shows You What To Do!
Hidden pairs - a Sudoku technique for beginners
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Sudoku 'expert' level tricks. Sudoku expert level. How to solve sudoku expert level #puzzle
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Tutorial 53 Spotting a 3X3. A powerful technique in sudoku puzzles.
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Another Must Know technique Tutorial # 41 NOT a Puzzle
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Expert sudoku solved. How to solve a hard and expert sudoku using various expert sudoku tricks.
Tutorial #87. Beginners Delight. A difficult puzzle made easy
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Swordfish - an Advanced Sudoku technique
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Sudoku, Tutorial # 9. Using a combination of techniques.