I can't find the 1v1 challenge page, is it closed?

Describe your issue

I really like the 1v1 challenge. I want to use it to train my students.
But I can’t find the page anymore. Is it closed?


Additional info

Hey @freezhou , 1v1 is discontinued and all the puzzles contained in it are moved to curated practice.

For example, the C++ puzzles are moved to these two cards