ISBN-13: 9781544139784 / Angielski / Miękka / 2017 / 272 str.
ISBN-13: 9781544139784 / Angielski / Miękka / 2017 / 272 str.
Sudoku X also called Diagonal Sudoku. Each puzzle consists of a 9x9 grid containing given clues in various places. The object is to fill all empty squares so that the numbers 1 to 9 appear exactly once in each row, column, diagonal and 3x3 box.