Speed X
6000 XP
Finish a collection of 4k or higher with an avg. time of under 30 seconds.*
Rare
*The collection must contain at least 100 problems.
Recently completed by
MikoMiko93 2d, 
Елена Ефремова 2k, 
Ольга Киреева 1k, 
minkahoshi 2k, 
Babaykago 2k
and 159 others.
