Classic Sudoku 12 x 12 and his 200 Friends - "X" Diagonal - Very Hard -: + Killer Sudoku 12 x 12 "X" Diagonal Very hard + CenCenDoku 9 x 9 Very hard + Hidoku-doku 12 x 12 Very hard + Numbriks 12 x 12. This is the perfect book for you.

- 250 exciting puzzles - Classic Sudoku 12 x 12"X" Diagonal Very hard + Killer Sudoku 12 x 12 "X" Diagonal Very hard + CenCenDoku 9 x 9 Very hard + Hidoku-Doku 12 x 12 Very hard + Numbricks 12 x 12.- the very hard version as a champion, the golden prize of extreme Sudoku - each Sudoku has a unique solution - tasks are conveniently located - large font - develops memory, logical thinking, helps to focus - 2 puzzles on the page - wide internal fields allow you to record your decisions and tho...