The game is two-player one-card poker played with a 582-card deck. Each player antes $1 and is dealt a card. Player 1 can then either bet $1 or check and give the opponent the option of betting. Facing a bet, a player can raise $1 after which the original bettor can reraise $1 more. The game ends when a player folds, calls or checks back.
Each vertical column of pixels in the charts represents a card with rank increasing from left to right. The height of a colored bar in a column represents the relative probability that the player chooses the action represented by the color.