Er, it's the 47th Uhrencup, not the 49th. My bad
Well, seeing as the game kicks off at 19.30 - changed from 19.45 - I suggest those from Zurich take the 17.30 IC, arriving at Grenchen at 18.35.
Given the 5 minute walk and 20 minute queue to get into the stadium, plus 10 minutes squeezing at the bar for the bevvies, this will be about right.
I suggest if you wanna meet for the train we say 17.15 outside the Kiosk facing the platforms (not by the meeting point) but please be punctual as this train is often full. I'll wait five minutes
Otherwise why not send a quick PM where we can swap mobile numbers?