Setup
Can players change roles after the cards are dealt?
No, the roles are assigned before dealing cards. Only switch cards can change the roles.
What determines who goes first?
The players decide that together base on what seems most strategically beneficial.
What happens when a stack starts with a bridge?
Any player can put a 12 or a 1 on it regardless of their role.
Can Two Stacks be a single player game?
Yes, in this case one person controls two hands and the rules are the same as a two player game.
Cards
What happens when a stack begins with a bridge and an additional bridge is played on it?
Any player can now play an 11 or a 2 on it regardless of their role.
Can bridges only jump up or down a number?
Yes. A 5 with a bridge on it can only have a 7 or a 3 played on it. The numbers 6 and 4 have been jumped and can no longer be played.
How do the Upward/Downward roles interact with special cards?
They are limited by whether a number is above or below the special card. For example: the Upward player can play a 6, 8, 10, or 12 on a special 5 but not a 2 or a 4; the Downward player can play the opposite of that.
Turns
Does a player have to play a card on their turn?
No, but it is required that a card be played before a player can pass cards.
Is there a limit to how many cards a player can draw?
Only the hand limit of seven cards limits the card draw phase.
Does the game end when the deck runs out of cards?
No. Turns continue but players may only pass cards if they play a card first. The game only ends when all players are stuck (loss) or all players have played all the cards in their hands (win).