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Pyraminx (1981) — Designed Before the Rubik's Cube, Released to Ride Its Boom
The Pyraminx is a tetrahedral twisty puzzle: each of its four faces is divided into nine triangles, and only the vertices and edges actually need to be solved. Its inventor, Uwe Mèffert, is said to have worked out the basic mechanism around 1971 — before Ernő Rubik even conceived the Cube in 1974. But Mèffert held off, securing patents in multiple countries, and only brought it to market in 1981 through Tomy, riding the Rubik's Cube boom he had arrived too early for. It reportedly sold over ten million units in its first year and roughly ninety million within three. Unlike the Cube, where every piece's move affects every other piece, the Pyraminx's four corner tips spin freely without touching the rest of the puzzle at all — a different design lesson about which parts of a mechanism actually need to be connected.
Nine Linked Rings (Baguenaudier) (1872) — The Year an Origin-Unknown Ring Puzzle Turned Out to Use Binary Math 81 Years Before a Telegraph Engineer Patented the Same Idea
Nine Linked Rings, or Baguenaudier: remove rings from a bar one at a time until the last one slides free. Its origin is said to be China, but nothing is settled; the earliest confirmed records are a 16th-century Chinese text and, around the same time, the writings of Italian mathematician Luca Pacioli. In 1872, Lyon mathematics enthusiast Louis Gros became the first to theorize the puzzle's solution as a binary table. The same idea was independently reinvented 81 years later, in 1953, when telegraph engineer Frank Gray patented what communications engineers now call the "Gray code." As a physical puzzle, a 1970 patent by William Keister became "Spin-Out," an early product of Binary Arts (founded 1985, now ThinkFun), still sold today. This piece follows the 150-year lineage of a single ring mechanism.
Peg Solitaire (1697) — The Day a Game With No Inventor Became the Math of Proving "Unsolvable"
On a cross-shaped board of pegs, you jump one peg over its neighbor and remove it, again and again, hoping to end with a single peg left. The earliest record of Peg Solitaire appears in 1697, in the French court periodical Mercure Galant under Louis XIV. No inventor is known. The popular legend that a prisoner in the Bastille devised it traces back no further than an English book from 1801, and puzzle historian John Beasley calls it unsupported by any earlier French source. In 1912 Ernest Bergholt found an 18-move solution to the classic problem; in 1982 Winning Ways for Your Mathematical Plays introduced the "pagoda function," a tool for proving certain positions mathematically unreachable. In 2007 the board resurfaced as puzzles inside Professor Layton and the Diabolical Box. This piece traces a single ruleset that has been played for over three centuries without ever needing a named inventor.
Mastermind (1970) — A Telecoms Engineer's Four Colors, Later Reborn as Fallout's Hacking Screen
In 1970, Israeli telecommunications engineer Mordecai Meirowitz devised Mastermind, a game that reveals only a count of hits and near-misses from four hidden color pegs. Rejected by major toy companies, it was released by Invicta Plastics in 1971 and sold over 30 million sets within the decade. In 1976 Donald Knuth showed it could be solved in five moves or fewer, and in 2007 a Bethesda programmer built it directly into Fallout 3's hacking minigame. This piece traces how a half-century-old constraint — telling the player only a number, never the answer — still shapes puzzle design in the age of Wordle.
Hakoiri Musume / Klotski (1930s) — The Lineage of Blocks That Trapped Cao Cao
In the West as a patent drawing, in China as a paper cutout re-enacting Cao Cao's defeat, and in Japan as a wooden toy called Hakoiri Musume — nearly the same sliding-block puzzle arose independently in three places between the 1890s and the 1930s, with no evidence any referenced the others. Martin Gardner published its 81-move optimal solution in Scientific American in 1964; Microsoft's Windows Entertainment Pack carried it to PCs worldwide in 1991. This is the record of that parallel evolution, up to 2021's Blockee on Steam, which names Klotski as its inspiration in its own words.
Soma Cube (1933) — Twenty-Seven Fragments Born in a Quantum Mechanics Lecture
In 1933, half-listening to a lecture on quantum mechanics in Copenhagen, Piet Hein enumerated every non-convex fragment that could be made by joining four or fewer unit cubes by their faces, and produced the seven-piece, 27-cube Soma cube. Popularized worldwide by Martin Gardner's 1958 column and commercialized by Parker Brothers in 1969, its 240 solutions were later hand-solved by John Conway and Michael Guy, and its debt is acknowledged by none other than Rubik's Cube inventor Erno Rubik. This piece traces ninety years of a solid-dissection puzzle lineage.
The Birth of the Jigsaw Puzzle (1760s) — The Man Who Cut Up Maps, and a Verb Unchanged for 260 Years
In 1760s London, the map engraver John Spilsbury mounted printed maps on wood and cut them apart along national borders, selling them as 'Dissected Maps' — the commercial starting point of what would later be called the jigsaw puzzle. This essay revisits the context in which the format was born as a tool for teaching geography, the structural insight that where you cut is itself the design, and the lineage that runs from Depression-era die-cut cardboard to the 2021 VR title Puzzling Places — a format that survived 260 years without ever changing its verb.
Rubik's Cube (1974) — A Labyrinth of 43 Quintillion States, and a Single Solution
In 1974, the Budapest architect Ernő Rubik carved a small cube as a teaching aid—and ended up placing an entire 'state space,' some 43 quintillion configurations with exactly one solved form, into the palm of a hand. This piece traces the object's precise provenance through primary and secondary sources—its 1974 invention, its 1980 global debut, and the 2010 proof that 'God's Number is 20'—and reads, as history, how an object with no screen and no power supply embodied half a century early the vocabulary modern puzzle designers now take for granted: reversibility, a unique solution, and a space to be searched.
