Each edition of the
200 Hard Sudoku
series contains
200 computer-generated
Sudoku puzzles. The Sudoku puzzles are
asymmetric Sudoku
with 32 predefined numbers from 1 to 9. This gives the level of difficulty as
hard
. There are four puzzles per page whereby each number square in a Sudoku provides
enough extra space within the square to write smaller, optional solutions
as you work through the puzzle. All puzzles can be easily solved by excluding numbers by process of elimination from other columns, rows, or boxes, leaving
only one possible solution
. This book contains
solutions
as well as
general game instructions
for each of the 200 puzzles.