The colour count is wrong
Choose your cube size and check the count for each colour. A cube with N stickers per edge has N² stickers of each colour and 6 × N² in total. Once the counts match, check that the pieces form a valid arrangement.
The back or bottom face looks reversed
Follow the editor’s face guide and keep track of the indicated top and front. Enter the back as seen from behind and the bottom as shown in the guide. If you lose track, reset the view to keep the colours you’ve already entered.
The 3×3 is in an impossible state
A single twisted corner, a single flipped edge, or a swap of exactly two pieces cannot come from legal turns on a standard 3×3. First compare the affected stickers with your physical cube. If the colours match, check whether a corner was twisted or the cube was reassembled.
Parity on a large cube
On even-sized cubes from 4×4 to 16×16, a legal position can look like a flipped edge pair or two swapped edge pairs after reduction. Enter the cube at its full size so the solver can account for its centres and inner layers.
On odd-sized cubes from 5×5 to 17×17, fixed middle edges and the pieces around them have different constraints. Check whether the edge group is still unpaired before treating it as a flipped 3×3 edge.
The moves don’t match my cube
Pause and compare your cube’s front and top faces with the player’s starting position. To tell which way is clockwise, look directly at the face you’re turning. Use ‘Previous move’ to undo the last move or ‘Restart Solution’ to return to the saved starting state.
If you edited the colours or entered a different cube, solve the current state again.
Read the notation guideThe solver is slow or unavailable
Larger cubes can take longer. Leave the colours you’ve entered in place while the solver runs. If it times out, check your connection and try again. Once all the moves have played, the player reports whether the displayed cube is solved.
The QR code or app connection stopped working
Check that both devices are online. If the session has expired, reopen the scanner in the browser tab where you want the solution, then scan the new code.
See the scanner setup guideA saved result disappeared
Private browsing, storage restrictions, or clearing website data can erase a browser session. Enter or scan your cube again so the solver can verify the starting state and calculate a fresh solution.
My puzzle is a picture cube or shape modification
The solver checks sticker colours on standard cubes from 2×2 to 17×17. For picture cubes and shape modifications, the orientation of the pieces can also matter. After following the solution for the colours, check the orientation of the pieces on the puzzle.