Book Description

With a book size of 8.5 x 8.5 inches and only 4 puzzles per page, the 400 Sudoku Puzzles series is not intended for carrying in a Pocket or Handbag. The main purpose of the extra-large book size is to provide the solver with large, clear and easy to read puzzles. The Sudoku Puzzles in the Hard Sudoku series of books do require advanced solving techniques. In my classic Sudoku puzzles, the grid is 9 cells wide and 9 cells deep. The lines of squares running horizontally are called rows, and the lines running vertically are called columns. The grid is further divided by thicker lines into nine 3 x 3 square boxes. The aim of the puzzle is to fill the blank cells with the correct numbers. Each row, column and 3 x 3 box must end up containing all of the numbers from 1 to 9. Each number can only appear once in any row, column or 3 x 3 box. 400 Hard Sudoku Puzzles Extra-Large 8.5 x 8.5 inch Book Layout Easy to read (4 Puzzles per Page) Advanced Solving Techniques Required Ideal For Advanced Puzzle Solvers Solutions Included