65 generators · 1,452 tests · one seed
Infinite pages.
Zero surprises.
Lakolam is an engine that generates mandalas, kolams, mazes and logic puzzles as print-ready pages. Every output is reproducible from a seed. Every puzzle is proven to have exactly one solution.
$ lako preview -g mandala --seed 0xa11ce -o page.svg
Deterministic, forever
Generator + spec + seed → byte-identical output, guaranteed by 1,452 tests. A page you made today can be regenerated pixel-for-pixel in ten years.
Proven, not sampled
Every puzzle ships with a solver that certifies a unique solution and rates difficulty by the reasoning techniques it actually requires — no "medium" guesswork.
Print-ready by design
SVG masters, 300-dpi PDFs with KDP bleed, social canvases. Colouring pages are gated on region size and stroke width, so nothing ships that can’t be coloured.
Four lanes, one engine
Every generator emits the same display list and renders through the same backends — so a maze, a mandala and a crossword all export identically.
Design
Mandalas, kolams, tilings and flow fields — colourable line art with mathematical bones.
Maze
Square, triangular, hexagonal and circular mazes carved by eleven algorithms, with answer keys.
Logic puzzle
Sudoku, nonograms, slitherlink and twenty more — every one proven uniquely solvable.
Word puzzle
Word searches, crosswords, cryptograms and ladders — built from curated wordlists and quotes.
Straight from the engine
All generators →Nothing here is a mock-up: each preview below was rendered bylako preview --seed 0xa11ce.
Mandala
Circular, square and polygonal rosettes from a symmetric fundamental domain
Maze
Mazes on square, triangular, hexagonal and circular grids, carved by eleven algorithms, with answer keys
Sudoku
Sudoku with proven uniqueness and technique-ladder difficulty
Kolam
Sikku and pulli kolam: continuous loops woven around a dot lattice
Crossword
Symmetric crossword grids filled from a clued wordlist
Celtic Plait
An interlaced plait: cords passing over and under, with cells that turn them back
Nonogram
Picture logic puzzles, proven solvable by line reasoning alone
Tiling
Islamic star, Truchet, Penrose and Cairo tilings as line art
The whole engine, in your browser
Lakolam Studio
The engine compiled to WebAssembly with schema-driven controls for every generator. Tweak a spec, step a seed, export SVG, PNG or PDF — all client-side, nothing uploaded, no account.
Launch the studio →GPUI Studio (experimental)
The same engine with a fully-Rust, GPU-rendered interface — Zed's GPUI framework compiled to WebAssembly. One module holds the generators, the rasteriser, the UI and the fonts.
Try the GPUI studio →Or a thousand pages from the command line
The lako CLI generates books: batches with answer keys, parameter sweeps as contact sheets, and a validator that fails the build if a single page fails its checks.
$ lako generate -g nonogram --count 20 -o ./book
$ lako sweep -g flowfield --axis octaves=1,3,5 --seeds 4 -o ./sweep
$ lako validate -g wordfit --count 12 # exit 1 on any Fail
$ lako preview -g maze --profile kdp_letter_bleed -o maze.pdfzero surprises, demonstrated
Watch a maze solve itself
Every loop carves a fresh maze from the next seed and traces its one solution — the same promise every generator makes. A perfect maze has exactly one path between any two cells; the engine's solvers prove properties like this for every puzzle it ships.
About the maze generator →
FAQ
Questions, answered
Every claim below is checkable — in the metadata a generation reports, or in the page it produces.
How is this different from AI image generators?
There is no model and no sampling. Every page is closed-form mathematics and constraint solving: motifs are parametric curves, puzzles are built against solvers, and the output is a vector scene — reproducible byte-for-byte from its seed. Nothing is approximated, so nothing can hallucinate.
What does "deterministic" mean here?
The same generator, spec and seed produce byte-identical output, forever. Every page is reproducible: record the seed and you can regenerate the exact same mandala, maze or sudoku years later, at any size or format.
Are the puzzles guaranteed to be solvable?
Yes — every puzzle generator ships with a solver that proves the puzzle has exactly one solution and scores its difficulty by the techniques required. A generator without a solver does not merge.
What formats can I export?
SVG is the resolution-independent master; PNG and JPEG at any DPI, and print-ready PDF including KDP trim sizes with bleed. Fixed social-media canvases (Instagram, Pinterest, story) are built in.
Is Lakolam free?
Yes. Both studios are free to use, and the browser studio runs entirely client-side — nothing is uploaded, no account is needed.
Does the studio need a server?
No. The whole engine compiles to WebAssembly and runs in your browser. Pages are generated on your machine; the site itself is static files.
Can I sell what I generate?
Yes. The pages you generate are yours — puzzle books, colouring books, classroom sets, social posts. Wordlists and quote corpora ship inside the crates and are drawn from public-domain sources.
How are difficulty ratings decided?
By the solver, not by feel. Each puzzle is solved with a ladder of human reasoning techniques, and its rating is the hardest technique actually required. The metadata reports both the requested and the measured difficulty, plus the rating basis.
Get started
Your first thousand pages are one seed away.
Generate in the browser right now, or install the CLI and build whole books — pages, answer keys and validation in one command.
Every image behind this text is real engine output · seed0xa11ce