MasterMind is a game in which the computer selects 4 colors and the player has to guess which colors these are and in which sequence they were chosen. The player gets up to ten guesses to find out the colors. Each guess will be rated with a number of markers. A green marker (✓) indicates a correct color in the correct place, and a red marker (✓) indicates a correct color, but not in the right place. To make a guess, click on a color in the right-hand column, and then click on the cell where you think that color belongs. When all four columns are populated, click on the button labeled “Make a Guess”.