Sapphire
15 000 XP
Has a chance to trigger once a day on a difficult sdk problem.
Uncommon
Recently completed by
Jelmer 4k, 
genericname2511 3k, 
Xavier Richard 3k, 
Валерий Осипов 4k
and 987 others.
Jelmer 4k, genericname2511 3k, Xavier Richard 3k, Валерий Осипов 4k