Skat (card game) the outset how many rounds/deals they will play for. A central aspect of the game are the three coexisting varieties called "suit", "grand" and "null" games, that differ in suit order, scoring and even overall goal to achieve. Each round of the game starts with a bidding phase to determine declarer and the required minimum game value (explained below). Then, ten tricks are played, allowing players to take trick points. Each card has a face value (except in null games) and is worth that number of points for the player winning the trick. The total face value of all cards
Partition of a set into the connected components of the subgraph formed by the given set of edges. In this way, the lattice of partitions corresponds to the lattice of flats of the graphic matroid of the complete graph. Another example illustrates the refining of partitions from the perspective of equivalence relations. If "D" is the set of cards in a standard 52-card deck, the "same-color-as" relation on "D" – which can be denoted ~ – has two equivalence classes: the sets {red cards} and {black cards}. The 2-part partition corresponding to ~ has a refinement that yields the "same-suit-as" relation ~, which has