Example puzzle
This is an example puzzle. You can solve it the same way as you would solve competition puzzle, but result never stored. You can reveal an answer for the puzzle by clicking "Show answer" link.
Norinori
Author: Andrey Bogdanov
Shade some cells so that every outlined region contains exactly 2 shaded cells. Every shaded cell should share an edge with exactly one other shaded cell.
Grid control: Click the mouse button at the selected cell to change the color of the cell. More details about grid control are at the help page.