Sudoku Calendar 2025. Every puzzle in this calendar is created by nikoli, the best sudoku makers in the world—not a computer—to balance toughness and solvability and keep you hooked. Order now and start planning your year with daily doses of puzzle fun!
With a mix of puzzle variations to challenge all levels, such as irregular, diagonal, and sum sudoku, each page provides a unique puzzle to solve. Ultimate sudoku is the perfect.