A card game has several groups of cards with the cards of each group
identified by a common color and the cards of each of the groups are
successively numbered. A player is given four cards face down and four
cards in his hand. In a play of the cards, a player displays one card
from his hand and selects one of his face down cards to play it against.
The player declares whether the displayed card is higher or lower than
the selected card and wins points if his declaration is correct.