Сlassic 400 + Killer Hard levels sudoku 12 x 12

Killer Sudoku puzzles with the names: "Sums Sudoku", "Sums Number Place", "Samunamupure", "Kikagaku Nampure", "Sumdoku". Latin square in action. Sharpen your pencils and get ready for a digital attack. 400 killer sudoku puzzles hard levels. + 250 sudokus difficult level that can be downloaded and printed. + 250 maze puzzles that can be downloaded and printed. Unique puzzles. Only 1 verified solution. All answers are at the end of the book. Exclusive puzzles. A great book for free time and studying the mind. I hope you enjoy the book. Best regards, Basford Holmes