Source: http://mesmrswhitesclass.blogspot.com/2012/05/week-35.html
The red cards are negative and the black are positive. Each player
starts with 6 cards, drawing one at the beginning of their turn and
discarding one at the end. The goal is to play pairs that equal 6 or -6.
The person playing 3 pairs first wins. The other players add the
absolute value of their cards to get a score. The goal is to have the
lowest score at the end of the game.