Sudoku Collection : 200 Hard Frame Sudoku Puzzles 9X9

Frame Sudoku consists of an empty grid. Numbers in the outside frame equal the sum of the first three numbers in the corresponding row or column in the given direction.

• • Author: Alena Gurin
• • Publisher: Independently Published
• • Publication Date: Sep 07, 2019
• • Number of Pages: 122 pages
• • Language: English
• • Binding: Paperback
• • ISBN-10: 1691643696
• • ISBN-13: 9781691643691