Learn · Level 3 · orientation · case 20 of 57
OLL 20 · the X
None of the four edges points up, and every corner already faces up. 14 moves finish the yellow face.
No edge points up yet, so there is no yellow cross to steer by. The dot cases are the slowest starts and the rarest sights.
In this case none of the four edges points up, and every corner already faces up. The algorithm turns every last sticker of the top face yellow in one pass; where the pieces then sit is the next stage's problem.
Cubers know this one as the X. Names like this survive because solvers see the shape thousands of times and talk about it.
One last layer in two hundred and sixteen arrives exactly like this. The diagram shows the top face as you would see it from above, yellow where yellow already shows, with the outer ticks marking where the missing yellows currently point.
Checked by simulation before publishing: the position shown plus the moves shown must produce a finished cube, and the algorithm must touch nothing outside its own job. The diagram and the player are drawn from the same simulated position, so they cannot disagree.