Sudoku Ripple Effect - 200 Hard To Master Puzzles 7X7 (Volume 4)

Ripple Effect (also known as "Hakyuu", "Hakyuu Kouka", "Hakyukoka", "Seismic") is a logic puzzle published by Nikoli. The puzzle consists of a rectangular grid of any size divided into polyomino sections called "rooms". Each room must be filled with each of the numbers from 1 to the number of cells in the room. If two identical numbers appear in the same row or column, at least that many cells with other numbers must separate them.

• | Author: Dart Veider
• | Publisher: CreateSpace Independent Publishing Platform
• | Publication Date: Mar 04, 2017
• | Number of Pages: 136 pages
• | Language: English
• | Binding: Paperback
• | ISBN-10: 1544027389
• | ISBN-13: 9781544027388