Achievement: Solve 10 3d problems

Solve 10 3d problems

1100 XP

Solve 10 3d problems.

Recently completed by

Pierre-Marie GORI 2k, Wolland 2k, potatotips 1k, Kirill Nech 1k, Beggarlyrot 1d, bianyang 1k, Guido Profitos 2k, Tschej 1d, Nevare 1k, Hrafninn 1d

and 144 others.