Achievement: Solve a 2d problem

Solve a 2d problem

400 XP

Solve a 2d problem.

Recently completed by

Bezlikii 4k, Michiel Tel 1d, FinnFol 4k, CatBruno 4k, Mert Tuna Çiçek 2k, Dawn Sum 2d, Ольга Киреева 11k, Алёна Киреева 10k, Joey Edmonston 2k, FireScourge 3k

and 1055 others.