Sevens (card game) from 1 to 20 in four (in some editions three) colours. It is marketed in Germany by Ravensburger. In this game three fourths of the cards remain in the stock, players can play as many cards as they want in one move, and players who cannot play at least one card must draw up to three cards. The score of a card is its face value. The rulebook distributed with the game describes two variants (one permitting each colour to be started with 10 or 12 instead of 11, and one that is similar to the French card game "Domino")
Card game reason card games are often characterized as games of chance or “imperfect information”—as distinct from games of strategy or “perfect information,” where the current position is fully visible to all players throughout the game. Many games that are not generally placed in the family of card games do in fact use cards for some aspect of their gameplay. Similarly, some games that are placed in the card game genre involve a board. The distinction is that the gameplay of a card game chiefly depends on the use of the cards by players (the board is simply a guide for scorekeeping