價格：免費
更新日期：2014-01-02
檔案大小：262k
目前版本：1.3
版本需求：Android 3.1 以上版本
官方網站：mailto:earl-greys-hand@arcor.de
Try to toggle all seven light on with a few moves as possible. But be careful - the neighborhoods will be toggled, too. You should never need more then 7 moves and you can see the nominal step number. It is a tiny riddle, inspired by an exhibit of the Mathematikum Gießen (Germany).
This App is free of advertising. You can find the source code on github.
