A real brain teaser where you have to move strategically to leave only one marble. It is difficult but it can be done. If you cannot manage to get down to one marble then move the marbles and reduce their number to the minimum to enter the high score table. This solitaire is also an educational game that develops forward thinking and strategy skills.This app contains advertising and uses cookies. It does NOT contain any in-app purchases. Visit the link on this page to our privacy policy for more details. By installing the app you are deemed to have understood this. Every Grey Olltwit free app provides a button on load to get the version without any advertising.