doodlejigsaw

THE STORY AND THE SCIENCE

Edges first.
Then the sky.

The jigsaw began as a geography lesson cut into pieces.

In 1766 a London map engraver glued a map of Europe to wood and cut it along the borders. Two and a half centuries later the puzzle has been a Depression-era craze, a factory product and the subject of a brain study. Here is the story, in plain English.

Plain English, with the sources linked.

Questions this page answers

Hands placing a piece into a half-finished jigsaw of teal, mustard and coral colour bands on a wooden table, with sorted pieces in a wooden tray
AI-generated image, not a photograph of a real person or place.

SINCE 1766

  • Find the edges
  • Sort by colour
  • Look at shapes
  • One piece at a time

THE SHORT STORY

A map, a saw, a craze.

Three moments explain
how the jigsaw reached your table.

1766 · LONDON

A map cut into countries

John Spilsbury mounted a map of Europe on wood and cut it along the borders, as a way to teach geography.

Where it began

1876 · PHILADELPHIA

The saw that named it

The power scroll saw shown at the Centennial Exhibition became known as the jigsaw, and home puzzle-cutting took off.

How it got its name

2018 · ULM

A study of puzzlers

Researchers found jigsaw skill tracks eight thinking abilities, but a month of puzzling did not boost them.

See the study

A QUICK EDGE COUNTER

How many
edge pieces?

Most puzzlers start with the frame. Pick a puzzle size to see how many pieces have a straight side, assuming a typical rectangular grid of rows and columns.

Edge counter

Choose a puzzle size (pieces)
300 pieces, cut 20 × 1566 edge pieces

That is 22.0% of the puzzle, including the 4 corners. The other 234 pieces have no straight side.

500 pieces, cut 25 × 2086 edge pieces

That is 17.2% of the puzzle, including the 4 corners. The other 414 pieces have no straight side.

1,000 pieces, cut 40 × 25126 edge pieces

That is 12.6% of the puzzle, including the 4 corners. The other 874 pieces have no straight side.

1,500 pieces, cut 50 × 30156 edge pieces

That is 10.4% of the puzzle, including the 4 corners. The other 1,344 pieces have no straight side.

2,000 pieces, cut 50 × 40176 edge pieces

That is 8.8% of the puzzle, including the 4 corners. The other 1,824 pieces have no straight side.

Bar shows the edge share of the whole puzzle.

Makers use different grids, so your box may differ by a few pieces. The sum is simple: twice the columns plus twice the rows, minus the 4 corners counted twice.

WHAT ONE STUDY FOUND

Linked for life,
not in a month.

A German team asked 100 adults over 50
to puzzle, and measured how they thought.

8 of 8

Abilities tied to jigsaw skill

Jigsaw skill was linked to all eight visuospatial abilities tested, from perception and mental rotation to working memory and reasoning. People with more lifetime puzzling tended to score better, even after other factors were accounted for.

THE LINK · 2018

3,589 in 49 h

Pieces joined, on average

The puzzle group got better at jigsaws, but their overall visuospatial thinking did not improve compared with a group that had counselling sessions only. The authors suggest long-term, not short-term, puzzling may help.

THE TRIAL · 30 DAYS

A link is not proof. People who think well may simply enjoy puzzles more. The study is a reason to enjoy jigsaws, not a treatment.

START A PUZZLE

Four habits for
a smoother puzzle.

  • Turn every piece face up

    Before you join anything, flip all the pieces so the picture shows. It is slow at first and saves time later.

  • Pull out the edges

    Set aside every piece with a straight side and build the frame. It fixes the size of the picture and gives you a place to start.

  • Sort by colour and texture

    Group the rest into small dishes by colour, then work on the most distinctive area first, leaving plain sky or sea for last.

  • When colour fails, read the shape

    In plain areas, sort pieces by their knobs and holes instead. Good light and short breaks help you spot fits you missed.

Overhead view of a row of straight-edged puzzle pieces beside three ceramic dishes of pieces sorted by teal, mustard and coral
AI-generated image, not a photograph of a real person or place.

JIGSAW FACTS

Five pieces of
the bigger picture.

Thick hand-cut wooden puzzle pieces painted in teal and mustard next to a hand fretsaw and sawdust on a workbench
AI-generated image, not a photograph of a real person or place.

  1. It started as a school aid

    Guinness World Records credits John Spilsbury with the first jigsaw in 1766: a map of Europe on wood, cut along national borders. Such dissected maps were made to help teach geography.

  2. The name came later

    The power scroll saw had its public debut at the 1876 Centennial Exhibition in Philadelphia and became known as the jigsaw. People then began cutting puzzles at home with it.

  3. Cut by hand, in a factory

    By 1910 Parker Brothers was the leading American puzzle maker, with about 200 women cutting puzzles by hand at its factory in Salem, Massachusetts.

  4. Ten million a week

    At the height of the Great Depression craze, the jigsaw historian Anne Williams has said, about 30 million US households were absorbing 10 million puzzles every week.

  5. A month did not change minds

    In a 2018 Ulm University trial, adults over 50 who puzzled at least an hour a day on 30 days got better at jigsaws, but not at the wider visuospatial skills measured.

QUICK QUESTIONS

Jigsaws, answered.

Short answers to the questions people ask most.

Who invented the jigsaw puzzle?

Guinness World Records credits John Spilsbury, a London map engraver, with the first jigsaw puzzle in 1766: a map of Europe mounted on wood and cut along national borders. These early "dissected maps" were sold as aids for teaching geography.

Why is it called a jigsaw puzzle?

The name comes from the tool. The power scroll saw made its public debut at the 1876 Centennial Exhibition in Philadelphia and became known as the jigsaw; people then began cutting their own puzzles with it.

Are jigsaw puzzles good for your brain?

A 2018 study from Ulm University found that jigsaw skill was strongly linked to eight thinking abilities, and that lifelong puzzling went with better visuospatial thinking. It could not show that puzzling causes the benefit, and a 30-day trial found no short-term gain.

How many edge pieces does a 1,000-piece puzzle have?

It depends on the grid the maker uses. Cut as 40 by 25, a 1,000-piece puzzle has 126 edge pieces, including 4 corners: about one piece in eight. The bigger the puzzle, the smaller the share of edge pieces.

How popular were jigsaws in the Great Depression?

Hugely. The jigsaw historian Anne Williams has said that at the peak, around 30 million US households were absorbing 10 million jigsaw puzzles every week. Cheap die-cut cardboard puzzles and home-made rental puzzles fed the craze.

Sources

Where the facts come from

  1. First jigsaw puzzle (John Spilsbury, 1766)Guinness World Records
  2. MapCarte: Europe divided into its Kingdoms, Spilsbury 1766International Cartographic Association
  3. America the beautiful jigsaw puzzle (Richard Brophy)American Heritage
  4. Piecing together the history of jigsaw puzzlesCBS News, 2020
  5. Jigsaw puzzling taps multiple cognitive abilities (Fissler et al.)Frontiers in Aging Neuroscience, 2018
  6. Jigsaw Puzzles As Cognitive Enrichment (PACE): study protocolTrials, 2017

A NAME THAT FITS

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