The puzzle a 16 x 16 grid made up of 4 x 4 subgrids (called "regions"). Some cells already contain numbers, known as "givens". The goal is to fill in the empty

Each puzzle consists of a 16x16 grid containing given clues in various places. The object is to fill all empty squares so that the numbers 1 to 16 appear exactl

When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Sudoku

Challenge your brain, have a fun time, and fight the boredom with the mega Diagonal Sudoku challenging puzzles. This Sudoku activity book includes 120 puzzles o

When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Sudoku