4 in a row是一个双玩家连接游戏
4 in a row is a two-player connection game in which the players then take turns dropping coloured discs from the top into a seven-column, six-row vertically suspended grid. The pieces fall straight down, occupying the next available space within the column. The objective of the game is to be the first to form a horizontal, vertical, or diagonal line of four of one's own discs.