Opp
Opp is a PBL case on the 2x2 (medium). Algorithm: R U' R' U' F2 U' R U R' U F2. Below are 3 variants with a 3D animation and a scramble to practise.
My status:don’t know
How the status is counted
Training counts the status. A case added to training gets “learning”, and “known” after 5× “correct” in a row with the timer and without hints, when the average time is within the category threshold (Settings). 2× “wrong” in the last 3 attempts or much slower times drop it back to “learning”. Daily tasks don’t change the status.
How to recognize
No headlights on top (diagonal swap), bottom layer solved.
Algorithms
Tap a variant to see it in 3D.
- Main variant
Scramble
From a solved cube: yellow on top, green in front.
Generating a scramble…