Stonewall Solitaire is a variation of Flower Garden Solitaire.
There are two differences from Flower Garden Solitaire both of which conspire to make the game *much* more difficult.
Firstly, alternate cards on The Tableau are placed face down. Secondly only cards of opposite colour can be placed on the Tableau.
There is a large element of luck in Stonewall Solitaire, or maybe that is just sour grapes as I have *never* won:(