Rules

The Rubik's Cube is a classic 3D twisty puzzle: you scramble and restore it with legal face / layer turns until each of the six faces is a solid color.

1. The classic form is a 3×3×3 cube: six faces, nine colorlets per face (stickers or molded plastic).
2. You may only turn whole layers about axes through the faces. Do not disassemble the core, pop pieces out to “cheat,” or peel and restick colors.
3. Pieces come in three types: centers (one per face; they define that face’s target color and keep fixed relative positions on the core), edges (12 dual-color pieces), and corners (8 triple-color pieces).
4. Legal turns permute and orient edges and corners; they do not swap the centers’ relative color scheme (opposite-color pairs stay fixed on a standard six-color cube).
5. Solved means every face is uniform and matches the center-defined color scheme (e.g. the common white-opposite-yellow layout).
6. NxN cubes (2×2, 4×4, 5×5, …) and other twisty shapes (Pyraminx, Skewb, …) share the family but differ in piece types and procedures. These rules describe only the classic 3×3 cube.

Remember: turn layers only; centers set colors; place and orient edges and corners; six solid faces wins.

Operations and notation

Teaching and competition usually use Singmaster notation: U D L R F B for Up, Down, Left, Right, Front, Back; a prime (′) means counterclockwise; 2 means 180°.

How to start solving

1. Read the centers: learn opposite and adjacent colors; beginners often keep white on top.
2. First-layer cross: place the four white edges correctly oriented.
3. First-layer corners: insert the four white corners to finish the first layer.
4. Middle-layer edges: insert the four edges that do not belong on the opposite face.
5. Last layer: finish with a beginner layer-by-layer method or an advanced method such as CFOP (cross already done, then F2L, OLL, PLL).
6. Done: six solid faces. A face that “looks solid” with wrong edge/corner orientation is not solved.

Layer-by-layer is enough to start; speedcubing adds F2L, OLL, PLL, and more. Logic and spatial reasoning suffice—no disassembly required.

Makeup of the puzzle

Difficulty comes from scramble depth, finger tricks, and algorithm knowledge—not from a larger paper grid.

(1) 1974: Budapest prototype

Hungarian architecture professor and sculptor Ernő Rubik built a layer-turning cube prototype in Budapest in 1974, initially as a tangible model of three-dimensional relationships for his students. Early builds used wood and simple fasteners. After scrambling his own invention, he later recalled needing about a month to restore it—revealing a deep recreational puzzle, not only a teaching aid.

(2) 1975–1977: Hungarian patent and the Magic Cube

Around 30 January 1975, Rubik filed in Hungary for what sources describe as a “spatial logical toy.” The well-cited grant is Hungarian patent HU170062 (also seen as HU170062B), covering interlocking elements that rotate about a central mechanism. Domestically the product sold as Bűvös kocka (Magic Cube). By about 1977, plastic versions reached Budapest toy shops (accounts often name Politechnika among early manufacturers). Cold War–era export controls limited early international reach.

(3) 1979–1980: Nuremberg, Ideal Toy, and the global name

At the 1979 Nuremberg Toy Fair and related efforts, figures such as Tibor Laczi helped bring samples west. Toy marketer Tom Kremer of Seven Towns brokered a license with Ideal Toy in the United States. Ideal wanted a distinctive, trademarkable name; in 1980 the Magic Cube launched internationally as the Rubik's Cube, quickly becoming a pop-culture icon and earning industry honors such as a German Game of the Year special award for Best Puzzle. Many mechanism patents have since expired; the brand trademarks remain in force. Encyclopedia prose should separate “expired mechanism patents” from “active trademarks.”

(4) 1980s boom and the first world championship

In the early 1980s the Cube surged across Europe, North America, and East Asia; early-year sales are often counted in the hundreds of millions. 1982 saw the first Rubik's Cube World Championship in Budapest (winning time about 22.95 seconds on official timelines). Spin-offs such as the Snake and Rubik’s Magic appeared. After the first boom cooled, enthusiasts kept records and methods alive through newsletters and early online groups.

(5) Speedcubing and the World Cube Association

In the late 1990s and early 2000s the internet reunited scattered speedcubers. A 2003 world championship in Toronto showed both demand and the cost of inconsistent timing and rules. In 2004, Ron van Bruchem and Tyson Mao helped found the World Cube Association (WCA) to standardize events, scrambles, timing, and records. Competitions later spread to dozens of countries and many twisty events beyond 3×3.### (6) God's number and algorithmic culture

Despite a vast state space, the Cube is a finite group shortest-path problem. Around 1995, Michael Reid and others showed that positions such as the superflip need at least 20 moves in the half-turn metric. In July 2010, Tomas Rokicki, Herbert Kociemba, Morley Davidson, and John Dethridge—using large-scale computation including donated Google CPU time—proved that every position can be solved in at most 20 moves in HTM: God's number = 20 (documented at cube20.org). Practical speed methods (CFOP, Roux, ZZ, …) use far more moves but fit human memory and execution.

Sources

1. Rubik's Official History
2. Smithsonian Lemelson Center, “A Twist of Fate: The Invention of the Rubik’s Cube”
3. Hungarian patent HU170062B (Google Patents)
4. English Wikipedia, “Rubik's Cube”
5. Chinese Wikipedia, “魔方”
6. cube20.org — God's Number is 20
7. World Cube Association
8. Japanese Wikipedia, “ルービックキューブ”
9. BBC News, “Rubik's Cube quest for speedy solution comes to an end” (2010)