Overview
Duchess of Luynes is a patience or card solitaire game played with two packs of playing cards. It is a member of the Sir Tommy family. A unique feature of this game is the building of the reserve, which is not used until the entire stock runs out.
Name
An English game possibly of French origin it was first called La Duchesse de Luynes or Duchess of Luynes by Lady Adelaide Cadogan (1874). In American sources it is usually known by the name of Grand Duchess Jones (1888) also referred to it as One to Six and that name is occasionally copied by later writers. Parisienne is a variant recorded by Parlett.
Rules
First, four cards are dealt face-up, one onto each tableau pile, and two more cards are dealt face-down on the reserve to be used later. After each deal of six cards, the player pauses to see if any cards are playable. Available for play to the foundations (which are above the four tableau piles) are the top cards of each tableau pile.
As they become available, one ace and one king of each suit are placed in the foundations. The aces are built up to kings while the kings are built down to aces, all by suit. Furthermore, once a foundation card is set, any can be built upon it at any time.
From Wikipedia (CC BY-SA 4.0).