Diagonal Sudoku Puzzle Books - 400 Easy to Master Puzzles 9x9 (Volume 3)

Diagonal Sudoku also called Sudoku X. The puzzle is a 9x9 grid made up of 3x3 subgrids (called "regions"). Some cells already contain numbers, known as "givens". The goal is to fill in the empty cells, one number in each, so that each column, row, region and diagonal contains the numbers 1 through 9 exactly once. Each number in the solution therefore occurs only once in each of three "directions", hence the "single numbers" implied by the puzzle's name.

Author: Dart Veider, Dmytro Khomiak

Publisher: Independently published

Publication Date: Sep 22, 2019

Number of Pages: 239 pages

Language: English

Binding: Paperback

ISBN-10: 1695011856

ISBN-13: 9781695011854