Deal thirteen piles of four cards into a row of seven and a row of six, then refill an empty front column with any card, a break Baker's Dozen never allows.

Spanish Solitaire takes the Baker's Dozen Solitaire deal, thirteen piles of four cards arranged in a row of seven and a row of six, and loosens it in one spot: an empty column in the row of seven can be refilled with any card. Baker's Dozen never lets you refill a column once it's empty, so that bit of extra room changes which deals you can dig your way out of. Castles in Spain Solitaire is another game built on the same layout.
Building sequences down the tableau is the core move in Solitaire too, so it's an easy next stop.
If you run into anything odd or have an idea that would make the game better, please contact me.
Have fun!
There are four foundation piles.
A card can be added to a foundation pile only if it's one rank higher and the same suit as the pile's current top card, so the only card that fits on a 4 of hearts is a 5 of hearts.
The top card of each foundation can be moved back into play if another pile will accept it.
Thirteen tableau piles of four cards each, arranged in a row of seven and a row of six, all dealt face-up.
A card can be added to a tableau pile only if it's one rank lower than the pile's current top card, of any suit, so a three of any suit fits on a four.
Cards on the tableau that are not covered by another card are free to be played onto the foundation or any other tableau pile.
Any card can fill an empty slot in the row of seven. Once a pile in the row of six is emptied, it stays empty.