Speed II
4000 XP
Finish a collection of 11k or lower with an avg. time of under 10 seconds.*
Rare
*The collection must contain at least 100 problems.
Recently completed by
Matteo Provini 5k, 
Gabrielius Kazakevicius 8k, 
Julien PRUSAK 6k, 
Thor40 7k,
and 23 others.