- 250 exciting puzzles 50 Killer Argyll puzzles with the names: "Sums Sudoku", "Sums Number Place", "Samunamupure", "Kikagaku Nampure", "Sumdoku".50 Three beyonddoku - Windowdoku sudoku puzzles with the name: "Outside Sudoku".50 2 pointsdoku - Hermit sudoku puzzles with the names: " Kropki Sudoku "," Dots Sudoku "," Sudoku with points".50 Hikaku "X" Diagonal sudoku puzzles with the name: "Greater Than Sudoku".50 Even - Odd Puzzles - Anti-Knight.- hard and believe the 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 thoughts- very convenient and practical - expands creative possibilities - perfect gift for all fans of puzzles.An excellent book for free time pastime and mind training. Thank you. Best regards, Andrii Pitenko