7Face off with a master.
Don't settle when it comes to your Sudoku: Choose puzzles hand-crafted by Nikoli, the Japanese company that invented the game. Every puzzle in this calendar comes from the minds of the best Sudoku makers in the world--not from the computer. And each puzzle hits that sweet spot between toughness and elegant solvability. The week begins with the easiest puzzles and ramps up the difficulty day by day. Just in case you need them, solutions are printed on the back of the pages. Printed on responsibly sourced paper and 100% recyclable.