SCANNER TROUBLESHOOTING
Why does my cube show an invalid state?
An invalid state means the entered stickers cannot describe a solvable standard 3×3 cube in the expected orientation. It does not automatically mean your physical cube is broken. First check the captured colors and how each face was held.
1. Check all nine stickers in every capture
Compare the detected grid with the photo before confirming. Tap an incorrect color square and choose its replacement. If the picture is blurred, cropped or affected by glare, retake it with even lighting. After confirmation, use the cube net to correct a sticker.
The counts can become green 8/9 and yellow 10/9. Correct the misread sticker to green, then check the other faces. Changing a random yellow sticker just to balance the counts can create a different invalid state.
2. Check the centers and the top edge
QuickCubeSolve uses white U, red R, green F, yellow D, orange L and blue B. Centers are fixed in the editor. Start with white facing the camera and blue on top, then follow the orientation guide for every face. A face captured sideways may have the right colors but the wrong sticker positions.
Rotate the whole cube between captures without twisting individual layers. If you changed the scramble halfway through, rescan all six faces so the captures describe one consistent state.
3. Nine stickers per color is necessary, but not sufficient
There must be nine of each of the six colors, including centers. The pieces must also be possible: an edge has two colors and a corner has three. In the supported color scheme, opposite centers are white/yellow, red/orange and green/blue; an edge cannot contain an opposite pair.
4. If the scan matches, check for a physical assembly issue
On a standard 3×3, a single flipped edge, a single twisted corner, or exactly two pieces swapped with everything else solved cannot be produced by normal face turns. Such states can occur after a piece is reinserted or a corner is physically twisted.
For example, if eleven edges are solved and only the remaining edge is flipped, repeating algorithms will not fix that isolated flip. Verify the scan first. If the physical cube was reassembled, consult its manufacturer’s maintenance instructions rather than forcing a piece.
What if the error remains?
- Retake faces whose top edge or center did not match the guide.
- Compare the full cube net against the physical cube, not just the counts.
- Use a standard six-color 3×3; picture cubes, unusual color schemes, 2×2 and 4×4 puzzles are outside this scanner’s supported setup.
See Ruwix’s illustrated explanation of impossible cube states for physical examples.