The goal is to guess the color of each of the pieces that are hidden under the black squares. In this free game you are asked to use you mind to strategize how you will determine which pegs fit in which slots. If you love playing free strategy games online then “Mastermind” is the game for you. One of the pieces has to be placed in each of the spaces until the line is complete. Every time a line is complete there will be a verdict. The white counter means that there is a piece of the right color it is just placed in the wrong hole. In this game there will not be two of the same colored pieces in the same line.