If the cube will not come together no matter what you try, it is probably not you. At some point a piece was twisted in its spot or moved into a place turning could never have put it, and from then on no sequence of turns will ever solve that cube.
This is one of the most ordinary things that happens to a cube, and it happens to everybody. Five minutes with your fingers puts it right, and the cube is as good as it ever was.
You get all the way to the end and one corner piece is in exactly the right place, with exactly the right three colours, but rotated. Its colours are a third of a turn out from the pieces beside it: the yellow that should be on top is facing sideways, and the side colour that should be facing you is pointing up. Everything else on the cube is finished.
Turning a face twists corners in sets that cancel each other out, so one corner left over twisted on its own is not something any number of turns could have made, and not something any number of turns can undo.
A stiff or a brand new cube can need a firm pinch here. It is meant to click rather than crunch, so if it will not go, turn the top layer a little further off square first.
One edge piece, the kind with two colours, is sitting in the right slot the wrong way round: its two colours are each on the face the other one belongs on. It shows up at the very end of the solve, usually as a single edge that refuses to flip however many times you run the sequence, while every other piece is already home.
Every turn flips edges two at a time, so the number of backwards edges on a real cube is always even. One on its own can only have got there by hand, and only a hand can take it back out.
This one is worth a grown-up's hands. Levering a piece out takes more force than a child expects, and a cube that flies apart on the carpet is how the next fault on this page usually starts.
The cube came apart at some point, on purpose or on the floor, and was pushed back together in whatever order the pieces came to hand. Two of them ended up in each other's homes. At the end of a solve you are left with two pieces that each need to be where the other one is, and swapping just those two is the one thing the method never asks for.
A turn always moves pieces around in rings of four, and no number of those rings ever adds up to a single pair traded. Two pieces put into each other's homes stay a pair the cube cannot untangle.
Corners and edges are different shapes and will not go into each other's slots, which means a rebuilt cube only ever has corners traded with corners and edges traded with edges. That narrows the search a great deal.
Working out which of the three faults you have by staring at a mixed-up cube is the hard part, and it is the part a computer is good at. Way of Cube can look at your actual cube and tell you.
Hold your real cube up to the camera and show it each of the six sides. The app reads the colours, then checks whether that scramble is one a real cube could ever be turned into. If it is not, it says so, lights up the exact piece that is wrong on a 3D cube you can spin with a finger, and shows you which way to mend it. There is a button for when you have done it, which takes you back through the camera to check your repair worked, and then it teaches you the whole solve from the cube in your hands.
Free, no account, and the camera pictures never leave your device.
New here? About Way of Cube explains how the lessons work and what age they suit.
Almost always because one piece is in a state that turning cannot produce: a corner rotated in its own spot, an edge sitting backwards, or two pieces in each other's homes. A cube like that looks exactly like an ordinary mixed-up cube, which is what makes it so maddening. You follow every step of the method correctly and the last few pieces simply refuse to land.
No. Twists and pops happen constantly, to everybody, and nothing about them is permanent: the plastic is fine and the cube is not worn out. A piece has been put somewhere it could not have turned its way into, and putting it back is a repair of seconds rather than a reason for a new cube.
Almost never. A twisted corner turns in place with your fingers and never leaves the cube at all. Only a flipped edge and a swapped pair have to come out, and that is one or two pieces levered out of the top layer, not fifty-four stickers and a pile of parts on the table.