ProName puzzle
Type a child's name and get chunky letters that drop into their own pockets in a tray.
Burr puzzle generator Pro
Six notched sticks that lock into a cross, proven to go together before you cut them.
Open Burr puzzle in the app
Pro generator: explore its settings in the app; cut files come with the Pro plan (coming soon).
In short: A six-piece burr: notched sticks that lock into a cross, each glued up from sheets. A solver takes every design apart, so it is proven to go together, and rates it by the moves to free the first piece.
A six-piece burr is the classic interlocking puzzle: six notched sticks that lock together into a three-way cross. Each stick here is glued up from sheets, so it can be cut on any laser.
The hard part of a burr is not drawing the sticks but knowing that a given set of notches can be assembled at all. This generator runs a solver on every design before showing it: it takes the puzzle apart move by move, so a design that can't be put together is never sent to the laser. It also rates the design by its level, the number of moves before the first piece comes free, so you can choose an easy one or a hard one.
The take-apart sequence is in the assembly notes; putting it together is the same sequence backwards.
You need: plywood and glue. A good fit matters for a puzzle that slides, so cut the fit test first.
Settings
All of these can be changed in the app, and the 3D preview updates as you type. The name under each setting
is its key in a share link, e.g. https://laserpuzzle.app/app/#/burr-puzzle?design=…; a link only
needs the settings that differ from the defaults.
Puzzle
| Setting | Default | What it does |
|---|---|---|
Designdesign | tricky | Ready-made designs from easy to hard, or a new random one (see Seed). Options: starter, tricky, hard, expert, random. |
Seedseed | 1 | With 'random': each number gives a different puzzle. From 0 to 99999. |
Target leveltarget_level | 4 | With 'random': the level the search aims for. Hard designs are rare, so it may land lower. From 1 to 8. |
Design codecode | — | 24 hex digits from a previous run's stats (overrides Design). Shares a puzzle exactly. |
Size
| Setting | Default | What it does |
|---|---|---|
Stick lengthlength | 8 units | Sticks are 2 x 2 x this many units. Longer sticks are easier to hold. Options: 6, 8. |
Sheets per unitlayers_per_unit | 3 | One grid unit is this many sheet thicknesses: sets the size of the puzzle. From 1 to 8. |
Playplay | 0.25 mm | Gap between touching faces, so the pieces slide. Added to the slot clearance. From 0 to 1.5 mm. |
Plus the material and machine settings every generator has: material thickness, kerf, slot clearance, sheet width, sheet height, part spacing, engrave part labels, cut line colour, engrave line colour.
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Fit test coupon
Cut it once per material and know your clearances before cutting a whole project.
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