What is this kind of card shuffling called?
Its a grid of cards where you take 1 card at a time to create a grid of say 2 wide and 2 tall, (although it could be any number wide/tall)
ASCII Drawing;
[[Deck]] -> Add one card to create 4 stacks and repeat the process over & over.
[Card] [Card]
[Card] [Card]
As you take cards you add it to a random stack thus creating (in the above example) 4 stacks (or decks) of cards
What is this shuffle called?