A number of other variations are possible, although far less common.
They may also be cut in one of several variations.
The test of the variation comes only after 14 Bd2!
There is a large amount of variation in the language.
What would have been really interesting is to see the range of variation.
So there's a great deal of variation in what they do.
There are also a number of variations on each approach.
After 1995 or so, there wasn't a whole lot of variation.
This has the potential for a wide range of variation.
The period is usually a week, but all kinds of variations are possible.