Amongst these, however, partnerships are the linch-pin each of the others ties back to this in some way. And, while the card play and scoring of the parent game are sufficiently and tactically interesting in their own right, each of these additions, in their way, serve to increase the number of decision points and, consequently, the feelings of tension you will have throughout the game.
Tichu is a climbing card game (in the same family as “President” or “Asshole”) descended from Zheng Fen with a few less combinations and different “bombs” but with partnerships, card passing, four special cards, and extra scoring.