Harp is a much harder variant of Solitaire Turn 1
Harp is played with two 52-card decks of standard playing cards. The layout, goal and the scoring are the same as for Double Solitaire Turn 1. The number of building locations in the Foundation is expanded to 8, the number of columns in the Tableau is expanded to 9, and there are 59 cards in the Stock.
In Harp, only the top card of each pile may be moved, the only exception to this rule is an ordered set of cards starting with a King (For example, King, Queen, Jack and 10) which may be moved together to an empty pile.
Another big difference from Classic Solitaire is that the Stock has only 3 re-deals.
A variant of Harp called Easy Harp features the same rules but with unlimited stock re-deals, which makes the game slightly easier.