This book has 202 Killer Sudoku X 12 x 12 Puzzles of varying difficulty levels. Challenge yourself today with Sudoku Puzzles! Each diagonal line, row, column and 4 x 3 box must contain one of the numbers 1 to 12. Killer Sudoku X puzzles include additional clues with dotted lines around different cells. These “boxed” off cells include a small number which indicates the sum of all the cells in that area. This is the second volume of 12 X 12 Sudoku X Puzzle Books For Adults. Answers are also included.