Mandelbrot Seahorse Valley
A zoom into the seahorse valley of the Mandelbrot set, computed pixel by pixel and coloured in cycling bands of blue, white and orange with the set itself in black. The fractal repeats at every scale, so nothing is uniform and even small pieces carry distinctive spirals.
Each button creates a lobby with the classic shape and rotation off, then opens it. Share the address bar with whoever should join.
Playing this picture
The suggested size is 500 pieces, which suits the amount of detail in the picture. Two to four people will usually finish that in well under an hour with the classic shape; on your own, allow roughly twice as long. Feel free to go up to 1500 pieces for a long session, or down to 24 for a quick warm-up. Once the lobby exists, anyone with the link can join, and the server keeps the puzzle for 12 hours after the last player leaves, so you can come back later and carry on.
- Classic (Normal): Traditional knobs and holes. Every piece has its own silhouette, so the shape helps you.
- Twisted (Hard): Wobbly, uneven cuts and knobs of random size. Pieces look alike and edges do not line up neatly.
- Square (Brutal): Straight cuts, no knobs at all. Only the picture tells you where a piece goes.
Want to set a piece count that is not in the list, or check the picture at other sizes first? Open it in the puzzle wizard. Controls and tips are on the how to play page.
