Sudoku Collection : 200 Hard Sudoku Xv Puzzles 9X9

Sudoku XV is the variation of the original sudoku. All adjacent cells with two digits summing to 10 are marked by X, while those summing to 5 are marked by V. The cells edges which do not contain an X or a V cannot have digits summing to 5 or 10.

• • Author: Alena Gurin
• • Publisher: Independently Published
• • Publication Date: Sep 12, 2019
• • Number of Pages: 122 pages
• • Language: English
• • Binding: Paperback
• • ISBN-10: 1692695053
• • ISBN-13: 9781692695057