Max amount of open challenges?

Question

What's the max amount of waiting challenges?

Answer 1

https://www.sololearn.com/Discuss/1451028/?ref=app

Answer 2

15 challenges max per day against one opponent and 20 outgoing unanswered challenges per hour.

Answer 3

No limit for waiting challenges.

Answer 4

Limiting challenges to an opponent is fine, otherwise there will be cheating. For example, I set up another nick and challenged myself