Based on the basic game of Hearts, this version adds two features to standard Hearts whereby a player may actually score plus. The play of the cards takes on heightened interest, since it combines "nullo" play (to avoid gathering hearts and the Q♠) with positive play to win plus points.
The Plus Card
The hearts and the Q♠ are minus cards, as in standard Hearts. In addition, the 10♦ counts plus 10 for the player who wins it. (In some localities, J♦ instead of 10♦ is the plus card.)
Slam
When a player wins all fifteen counting cards - the thirteen hearts, Q♠, and 10♦ - it is called a slam and he scores 26 plus (instead of 16 minus).