CCRL time controls

[drbob]

Hope this question isn't too off-topic for this forum.
The CCRL website describes time controls in terms of, for example, 40/4 or 40/40. That's pretty straight-forward. So 40 moves in 4 minutes or 40 moves in 40 minutes. But isn't something missing from that description? Like, "the rest in X minutes," something like that? Could someone take a moment to clarify this for me? Kind of a newbie question but there you have it. Any help would be appreciated.
Kind regards,
Robert

[ernest]

Like, "the rest in X minutes," something like that?

I don't think there is something like that...
It's 40/40+40/40+40/40+40/40... indefinitely.
So in theory (except for 50-move rule) it could last indefinitely.

But this is no different from Fischer TC, which also could last indefinitely.

Practically, in computer matches, average length is around 60-70 moves and practically never over 300.

[Graham Banks]

Yes - we use repeating time controls.

40 moves in 40 minutes repeating or 40 moves in 4 minutes repeating.
Of course, it should be mentioned that we benchmark our computers and use adapted time controls.
It's all explained in our weekly updates or on our site homepage.

[drbob]

Got it. And thanks to both of you, Graham and Ernest. Never occurred to me that the time controls would simply repeat, ad infinitum.
Regards,
Robert