Mastermind is a mind-blowing challenge in which you have to show your mind-boggling skills. The goal is to find the correct place of the balls with different colors in the sequence. Each ball can be used only once. Use your mouse to click and hold a ball and then drag it on an empty space. Once you place all the balls you will get a Mastermind response telling you how you placed the balls. The grey balls mean that you have placed balls with the correct color, but in the wrong position. The black ball tells you that you have placed a ball with the right color on a right position. But which is which, that is the question that has to be answered. Good luck with Mastermind!