BrainChallenge is a classic board game in which you have to try to figure out the four colors of the solution. You make a guess by placing one color on each of the available holes. Once you place the four colors and hit the green check mark and the system will tell you how accurate your guess was. A Black peg means you got the right color in the right place and a white peg means you got the a right color in the guess but it is in the wrong place. You have 10 chances to guess the solution.