ONLY 1.C5!!

You must play 1. c5!! with premove, dont think too much c5 is good enough for every opening.
b3-c5= Nimzo-Larsen Attack: English Variation
b4-c5= Polish Opening: Birmingham Gambit
c4-c5= English Opening: Symmetrical Variation
d4-c5= Benoni Defense: Old Benoni
e4-c5= Sicilian Defense
Nf3-c5= Zukertort Opening: Sicilian Invitation
g3-c5= Hungarian Opening: Sicilian Invitation
Other moves do not include a opening theory but c5 is playable in every 1st move, in every opening moves.