Shift whole same-suit runs instead of single cards in this one-deck cousin of Forty Thieves, and hope the deal opens a column for you.

Big Forty Solitaire is a one-deck cousin of Forty Thieves that lets you move whole same-suit runs instead of just single cards. Honestly, I'd have called it Bad Forty: it only turns into a real skill game once you get lucky enough to open up a column, and even then there isn't much skill involved.
If the run-shifting appeals to you, Forty Thieves Solitaire and the classic Solitaire are the two places to see the same idea again.
If you run into anything odd or have an idea that would make the game better, please contact me.
Enjoy yourself!
There are four foundation piles.
Any ace on a foundation can be moved back onto any empty tableau pile.
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 an 8 of diamonds is a 9 of diamonds.
The top card of each foundation can be moved back into play if another pile will accept it.
Ten tableau piles, each dealt four cards face up.
A card can be added to a tableau pile only if it's one rank lower and the same suit as the pile's current top card, so the only card that fits on a 7 of clubs is a 6 of clubs.
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 tableau slot.
Runs of same-suit cards can be moved together from one tableau pile to another.
There is one waste pile, and the remaining cards make up the stock.
Click the stock to deal one card to the waste. You can go through the stock as many times as you like.
The top card of the waste can be played to the tableau or foundation.