रूबिक क्यूब सॉल्वर

Start with the center color requested by the scanner facing the camera, then keep the listed top color on top while you capture that face. The center sticker is the anchor because it cannot move on a normal 3x3 cube.

After each capture, compare all nine stickers against the real cube before confirming. A scan is easier to fix immediately than after all six faces have been saved.

• Use bright, even light and avoid glare from glossy stickers.
• Keep the whole 3 by 3 face inside the square guide.
• Turn the cube in your hands between faces instead of rotating the camera.
• Recheck red and orange, plus white and yellow, because those pairs are the easiest to misread.

If one sticker is wrong, switch to manual entry and correct only that sticker. Use the center color and the surrounding pieces on the real cube as your reference, then confirm the face again.

If several stickers on the same face are wrong, rescan that face in better light. If stickers across many faces are wrong, restart the scan so every face was captured with the same orientation and lighting.

A valid 3x3 has exactly nine stickers of each color and piece combinations that can exist on a physical cube. The solver rejects states with missing stickers, wrong color counts, impossible corners, impossible edges, flipped edges, twisted corners, or swapped pieces.

Invalid does not always mean the cube is broken. Most invalid states come from one scanned color being assigned to the wrong sticker, especially near a shadow or reflection.

Center stickers define the color scheme: white opposite yellow, red opposite orange, and green opposite blue. The rest of the stickers move around those fixed centers.

Manual entry is best when your camera is unavailable, privacy settings block camera access, or you already know which sticker was detected incorrectly. Fill one face at a time and check each corner or edge against the real cube before solving.

Each move letter names the face to turn: R is right, U is up, F is front, L is left, D is down, and B is back. A plain letter is a clockwise quarter turn when looking directly at that face. A prime mark means turn the face counterclockwise. A 2 means turn it halfway.

Before following a solution, hold the real cube so the same front, right, and top faces match the viewer. If the real cube no longer matches after a move, stop and compare the last turn instead of continuing the sequence.