Uno Solitaire

This morning I was sitting at my in-laws' table, with nothing much to do. A deck of Uno cards were sitting on the table, left over from last night's game. I thought, "I could play solitaire, but these are Uno cards. Hmm, I wonder if you could make a solitaire game using an Uno deck. So I decided to try to make one. Here are the rules I came up with.

1. The deck is shuffled and 7 cards are laid, face up, on the table. This is the tableau. The remaining cards are placed face down into the draw pile.

2. Above the tableau are 5 foundation piles, one for each color (suit) and one for action cards.

3. The four foundation piles are built in the following order: 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

4. The fifth foundation pile is built as follows:
4a. The first card can be any action card.
4b. All subsequent cards must match either the action or the color (suit) of the previous card.
4c. Wild and Wild +4 cards match any action card.

5. Cards are drawn from the draw pile three at a time. The exposed drawn card can be played directly onto a foundation pile or onto the tableau. When the draw pile has been exhausted, the exposed pile is turned over to make a new draw pile.

6. Cards are played onto the tableau as follows:
6a. Cards are layered in alternating rows of seven and six cards, so that each card overlaps two cards in the previous layer, except for the cards on the ends of seven card rows.
6b. Each card must match each of the cards it overlaps either in value or color, so for example, a green four and a blue seven could be covered by a blue four or a green seven.
6c. The card that overlaps need only match one aspect of the cards it overlaps, so for example, two red nines could be covered by any red card or any nine.
6d. When a card from the first row of the tableau is removed, it must be replaced immediately with the top card from the draw pile.

7. The game is won when all the cards have been moved to the foundation piles.

Commentary:
Many of the rules of this game were designed to mimic rules in the Uno game. I've only played this game once, and I lost. It looks to me like it is a winnable game, but the player must be very careful to avoid burying useful cards. The cards on the ends of a row of seven are particularly useful because they only have to match one card from the previous row. Wild cards are extremely useful in the tableau. Save them until you really need them.

If anyone tries this game, please feel free to let me know how it went. In particular, I'd love it if you could let me know the percentage of games that were won.

Note to the lawyers: Uno is a trademark of Mattel. I don't work for Mattel. I'm not making any money from this. In fact, I'm only making Mattel money by providing a new way for people to enjoy Uno cards. So don't sue me.