Why when I'm loos an challenge i loos more XP'S but when i won an chalenge i get some XP' S

Answer 1

you lose a lot of xp if you lose challenges regardless of your own level but moreso because of the other person's score as well. if you beat a level 3 person when you're level 12, you're probably going only going to get a little bit of xp. the xp system is pretty unproportional when it comes to higher level users. the more you win challenges, the less xp you will probably receive from users of all levels with stats lower than yours.
i have lost MANY challenges and my xp has gone down, but it isn't really a problem because it doesn't affect me realistically. i prefer knowledge over stats :P

Answer 2

Why not

Answer 3

@VINNY thanks