TalentJR apps
Goal: Put a white corner into its place with the 4-move trick R U R' U'. 4 tasks · ★★★ = fewest moves.
The white-green-orange corner is above its place, white facing right. Do the trick once.
Your cube, unfolded
Goal
Algorithm
Keyboard: U D L R F B turn a face, with Shift for the prime (U'). Y turns the whole cube. Backspace undoes.
Turn U until the white corner is above its place at the front-right (its colours match the front and right centres). Then repeat R U R' U' until the corner sits in place with white at the bottom — 1, 3 or 5 times.
The four moves R U R' U' are the most useful trick on the cube. With a white corner above its place at the front-right, repeating them puts the corner in: once if white faces right, three times if white faces up, five times if white faces front. The cross is never broken.
Algorithm: R U R' U'
Chapter 3 — The white corners: One four-move trick puts every white corner in its place and finishes the first layer.