Download or read book Puzzles for Brain - Cross Sudoku 200 Medium to Hard Puzzles written by Alexander Rodriguez and published by Cross Sudoku. This book was released on 2019-03-20 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku - Each puzzle consists of a 9x9 grid containing given clues in various places. The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column and 3x3 box. Cross Sudoku has five merged grids. The numbers must be placed correctly for all the five puzzle squares