No Error Streak V
2000 XP
Make no error for 100 problems.
4/100
Uncommon
Recently completed by
Paul Hazelden 8k, 
Trent Rossouw 6k, 
sango chan 9k, 
Hidoshito 5k, 
Eugène Onéguine 4k, 
Ashenbark 2k,
and 1614 others.