Nimzovich was a proponent of the idea of over-protection, a concept which I don't understand well enough to ever implement in my games. Are there any example games at the GM level that illustrate this concept particularly well as a theme?
The classic game that is typically used to explain 'excessive' protection is Aron Nimzowitsch vs A Giese (played in 1913)
pay attention to moves 10. Nf3! (first defense of e5) then 11. Re1! (second defense), and finally 13. Bf4! (third defense of e5)