Jigsaw Killer Sudoku: Sudoku Collection : 200 Hard Jigsaw Killer Sudoku Puzzles 9x9 (Series #53) (Paperback)

200 excellent puzzles 9x9 at the level of Hard. Perfect for Advanced players. All riddles have only 1 solution. 2 puzzles per page.The font size is correct, you will not have to strain your eyes when solving puzzles. High quality paper and print (all puzzles read well, easy to write with pen and pencil without worry of bleed-through). Jigsaw Killer Sudoku combines Jigsaw and Killer Sudoku, replacing the 3x3 regions of regular Sudoku with irregular jigsaw shapes, and adding in the numerical cage constraints of Killer Sudoku. In killer Sudoku: additional numbers are given - the sums of values in groups of cells