Will Shortz Presents Hard Sudoku Volume 1: Hard Sudoku, cartea 1

The first in a new series: hard puzzles for serious sudoku solvers.

Do you have what it takes? These 200 challenging sudoku puzzles from Will Shortz will keep your mind sharp!

Features:
- 200 hard puzzles
- Big grids for easy solving
- Introduction by legendary Puzzlemaster Will Shortz