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LEV
PUZZLE
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Here you can solve **Ripple Effect** 8 by 8 puzzles online. This puzzle is strongly related to Suguru.
Ripple Effect is also known as **Hakyuu**, **Hakyuu Kouka**, **Hakyukoka** or **Seismic**. It is a logical puzzle devised by Nikoli. The puzzle consists of a rectangular grid with regions that are 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 of column, so many cells with other numbers must separate them. Unlike suguru Identical numbers may touch diagonally.

You can't change the numbers that are already on the grid when you start. We have given these numbers a bold font.

Follow the steps below to solve a ripple effect puzzle from our database.

- LEV: choose your starting level (1=easy - 3=hard).
- PUZ: enter the number of the ripple effect puzzle you want to solve.
- START: this hakyuu puzzle is now loaded and the box at the bottom right turns yellow.
- Choose a box where you want to enter a number. This box will then turn yellow.
- Choose one of the 5 big numbers if you are sure of your choice
- Choose one or more of the 5 smaller numbers to indicate possible candidates
- If you select a number when the box already has a number, then this new number will replace the previous number.
- You can make a box empty by clicking on the number that is already in the box.
- Click on ✓ to check the ripple effect puzzle. The wrong boxes turn red. If the puzzle is completely correct, all boxes will turn yellow.
- Click on SOL to show the solution of the hakyuu puzzle.