English Opening: King's English, Double Whammy Variation
Longest opening name?
Though I have not come across this opening during a game, I found out about it using the analysis feature. The name is, King's Gambit Declined: Falkbeer Accepted, Nimzowitsch-Marshall Countergambit (71 characters)
even if that was a discription, that is not the longest
this is,
King's Indian Defense: Orthodox Variation, Korchnoi System, Bayonet Attack, Panno Variation, Taimanov Variation Deferred
Hey I just found about "England Gambit: Reversed Alekhine, Reversed Krebs, Reversed Mokele Mbembe Variation
Anderssen Opening: Creepy Crawly Formation, Classical Defense