Learn from the world's bestselling Sudoku Master - watch as Wayne Gould explains a key technique in breaking Extreme Sudoku puzzles.
Part two's advice is on using X-wings to crack Extreme Susoku puzzles.
Learn from the world's bestselling Sudoku Master - watch as Wayne Gould explains a key technique in breaking Extreme Sudoku puzzles.
Part two's advice is on using X-wings to crack Extreme Susoku puzzles.
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