199+1 hard unique sudoku puzzles for advanced solvers. Contains a graded collection of medium (warmup) to very hard puzzles. Each puzzle has a unique solution.
199+1 hard unique sudoku puzzles for advanced solvers. Contains a graded collection of medium (warmup) to very hard puzzles. Each puzzle has a unique ...
2850 puzzles to enjoy throughout the whole year. A collection of 2850 unique puzzles for all levels of sudoku players. Each puzzle has a unique solution that does not require guessing.
2850 puzzles to enjoy throughout the whole year. A collection of 2850 unique puzzles for all levels of sudoku players. Each puzzle has a unique soluti...