Screw Puzzle Strategy: How to Unscrew in the Right Order
Nut-and-bolt puzzles are about order, not speed. How to read the layer stack, plan removals, and stop filling your spare boxes too early.

Screw puzzles look like a dexterity game and play like a dependency graph. Every screw pins one or more plates, plates overlap in layers, and removing the wrong screw first can lock a plate in place for the rest of the level.
What constrains you
Two things, and they pull against each other.
The layer stack. A plate can only come free when every screw holding it is gone. Screws sitting under another plate can't be reached until that plate lifts. So the board has an order, and part of it is fixed before you touch anything.
The colour boxes. You have a small number of collection slots, each locked to a colour once you drop the first screw of that colour into it. Fill every slot with a different colour and you have nowhere to put the next screw, which ends the level even when the board itself was fine.
Most losses come from the second constraint, not the first.
Read the board before the first tap
Count how many screws of each colour are visible. Then count your boxes. If you have three boxes and five colours on screen, you cannot simply work left to right. You need to fully clear colours, one at a time, so boxes free up.
That gives you the core rule: commit to a colour and finish it. Opening a box for a colour you can only partly clear is how boards jam.
The removal order that works
- Find the plates with a single screw left. They're free progress and they usually expose more of the board.
- Prefer screws whose colour you've already opened a box for. Every one of these is free; it uses no new slot.
- When you must open a new box, open it for the colour you can most nearly complete. Look at what's reachable now, not what's on the board in total.
- Leave deeply buried colours for last — you cannot finish them early, so opening a box for them strands a slot.
The mistake that costs the most
Tapping the screw that looks satisfying. The top-left screw, the one under your thumb, the one that's a nice colour. Each of those taps potentially commits a box.
Before any screw whose colour isn't already open, ask: can I collect all of this colour that's currently reachable? If not, find a different screw.
When the board is nearly jammed
If every box is open and none is close to full, your remaining play is to find any reachable screw matching an open colour and clear it, hoping to free a slot. Scan the whole board, including screws at the edges and under partially lifted plates. Reachability changes as plates move, and the screw you need is often one that wasn't reachable two moves ago.
If nothing matches an open box, the level is over. Restart and open your boxes more deliberately.
Plan two colours ahead
Screw puzzles reward players who plan two colours ahead rather than two screws ahead. Slow down at the start of each level, count the colours, count the boxes, and pick your first colour on purpose.
Play the game
Screw Puzzle: Nut & Bolt Sort
Master the tricky nut & bolt puzzle! Strategic unscrewing fun awaits you