Speed XI
8000 XP
Finish a collection of 4k or higher with an avg. time of under 20 seconds.*
Rare
*The collection must contain at least 100 problems.
Recently completed by
Bibigul Arzybaeva 2k, 
MikoMiko93 2d, 
minkahoshi 2k, 
Babaykago 2k,
and 93 others.
