1v1 Tourney hosted by {BoB}

[Mousikos]

Yeah, it could just be that I didn't read through the rules at a time when I was properly awake but I don't recall reading anything about a limited number of challengers. Nevertheless that's fine. Is my challenge form still valid if I simply change the name of the challenge-ee (?) when they've played their game?

There isn't a rule about limited number challenges, but I don't think it's fair to invalidate someone else's challenge if you win. But yes, your challenge form is valid for the winnter of the previous challenge.