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Ben Dobozy's achievement

Speed I

Finish a collection of 11k or lower with an avg. time of under 15 seconds.*

Rare

*The collection must contain at least 100 problems.

Recently completed by

KeimaCorner 10k,

Davide Piccinini 6k,

TemirNiazbekov 5d,

Greaseleeman 2k,

and 43 others.