Watch out! These Sudoku puzzles are serious! But if you dare, grab a pen and take on these two hundred all-new extra-challenging puzzles.
Features:
200 hard puzzles
Big grids for easy solving
Introduction by legendary puzzlemaster Will Shortz
Watch out! These Sudoku puzzles are serious! But if you dare, grab a pen and take on these two hundred all-new extra-challenging puzzles.
Features:
200 hard puzzles
Big grids for easy solving
Introduction b...
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