Connect Four (also known as Four Up, Plot Four, Find Four, Four in a Row, Four in a Line, Drop Four, and Gravitrips (in Soviet Union)
is a two-player connection board game in which the players first choose a color and then take turns dropping one colored disc
from the top into a seven-column, six-row vertically suspended grid. The pieces fall straight down, occupying the lowest 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. Connect Four is a solved game.
