Used to play Double Solitaire & forgotten how you deal. There were 4 piles and you could go up or down.?

Answer 1

there are several kinds of "double solitaire" and different sets of rules for the same game, the most common is probably what is sometimes called "klondike"

this site gives a very thorough set of rules:

http://www.pagat.com/patience/double.html

and also includes a free computer version playable across the web (I didn't try it)