until bedtime
Lock in a window: stay in a chunk during it for double ELO, or lose ELO five times as fast if you're not. Once it's locked in, it can't be changed or cancelled - you'll face whatever you set.
Locked in - no changes, no cancelling, until it passes.
No windows left today
You've used all 3 double windows for today - more open up tomorrow.
No chunks yet