Any ICE passing Frankfurt is a guaranteed 30 minute delay. Too easy to win.

For context, David Kriesel gave the infamous talk called “BahnMining” at 36C3 highlighting this. IIUC it’s only available in German: https://youtu.be/0rb9CfOvojk

Watch the original, there you can select an English simultaneous translation: https://media.ccc.de/v/36c3-10652-bahnmining_-_punktlichkeit...

That's the minimum though. It can surely escalate to 5 hours with people on the tracks.