Stimulate brain with the most famous logic based number game: SUDOKU Difficult and extremely hard level puzzles are great for advancedand foranyone who loves Sudoku.
4 large puzzles on each page Large print on white paper is very simple to read.
Every puzzle has a solution.
8.5 × 11 inch pages
Lots of Sudoku puzzles: 400 Sudoku
100 hard Sudoku
100 very hard Sudoku
100 extremely hard Sudoku
Answers for every Sudoku included in back
Relax and enjoy completing all such 400 fun puzzles game to stay active and have pleasure!