Klondike Solitaire - moving partial sequences between columns
I've never heard of any variation that would not allow you to do this. Though the help text you quoted is ambiguous, I believe that "deepest card" refers to the "deepest card that you want to move", not the "deepest card in the entire column". If the computer itself that has such a help file allows you to do the partial-run move anyway, do you have a reason for thinking that there is any such variation that doesn't allow it?