A Steinitz Variation is any of several chess openings introduced and practiced, or adopted and advocated by Wilhelm Steinitz, the first officially recognized World Chess Champion.
The double variation is a musical form used in classical music. It is a type of theme and variations that employs two themes. In a double variation set, a first...
Bottle variation is the degree to which different bottles, nominally of the same product, can have different taste, smell, etc. There are many possible causes of bottle variation:
In chess, an exchange variation is a type of opening in which there is an early, voluntary exchange of pawns or pieces. Such variations are often quieter than other lines...
