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
Davide Piccinini 6k, 
Greaseleeman 2k, 
zazenboy 6k, 
Matteo Provini 5k, 
Gabrielius Kazakevicius 8k
and 29 others.