| Management number | 240506904 | Release Date | 2026/07/16 | List Price | US$3.00 | Model Number | 240506904 | ||
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<b>Ripple Effect</b> (also known as "<i>Hakyuu</i>", "<i>Hakyuu Kouka</i>", "<i>Hakyukoka</i>", "<i>Seismic</i>") 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.
| Book format | Paperback |
|---|---|
| Fiction/nonfiction | Non-Fiction |
| Genre | Home, Hobbies, & Garden |
| Publication date | July, 2018 |
| Pages | 138 |
| Subgenre | Puzzles |
| Series title | Ripple Effect |
| Number in series | 13 |
| Edition | 1 |
| Publisher | Createspace Independent Publishing Platform |
| Original languages | English |
| Language | English |
| Is collectible | N |
| Binding type | Paperback |
| Retail packaging | Single Piece |
| Assembled product dimensions (l x w x h) | 6.00 x 0.30 x 9.00 Inches |
| Assembled product weight | 0.43 lb |
| Bisac subject heading | Games & Activities |
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