1.e4 Nc6 is called 'Nimzo's other defence' a really naff name.
I advocated calling it the Black Diamond Bay Openening because
I was listening to that track whilst noting up the game in the blog.
http://www.redhotpawn.com/blog/blogread.php?blogpostid=35
(I don't think it will catch on but anything is better than 'Nimzo's Other Defence.'😉
The Knights Tango comes about from . d4 Nf6 2. c4 Nc6