The Challange 1_2.zip is a release file of the Minecraft map The Challenge, made for Minecraft 1.9.1, 1.9.3, 1.10-Snapshot, 1.9.4, 1.9.2, 1.10.2, 1.10, 1.10.1, 1.9-Snapshot, 1.9. It was published on April 11, 2016 and is 0.3 MB in size. For the full description, screenshots and every other version, visit the The Challenge map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.