Quartroid is a simple but highly strategic board game played on a 4x4 board. Players take turn choosing a piece for the opponent to place on the board. Each piece is either: blue or orange; square or circular; solid or hollow; or with or without a border. The player that places the fourth piece in a row, horizontal, vertical, or diagonal where each of the four pieces share at least one attribute wins. Created by: Adam Björnberg and Þorsteinn Daði Gunnarsson