Screw Puzzle Online: Nuts and Bolts
Unscrew the nuts from one bolt and screw them onto another until each bolt holds nuts of a single color. Every level is generated on the spot and can be solved.
Tap a bolt, then another one to move the nuts.
How to play the Screw Puzzle
Tap a bolt to lift its top nuts, then tap another bolt to drop them on. A nut can only go onto an empty bolt or onto a nut of the same color, and each bolt has a limit on how many nuts it holds.
If several matching nuts are stacked on top, they all move together (as many as fit). When a bolt is full of a single color, it gets a check mark and can’t be moved anymore. The level ends when all the colors are sorted.
Empty bolts are your room to maneuver, so use them carefully. You can undo as many moves as you like, restart the level and, once per level, get an extra bolt. Every level adds more colors and, further on, taller bolts.
Frequently asked questions
Is every screw puzzle level solvable?
Yes. Before each level appears, a solver checks that all the nuts can be sorted using the empty bolts you have.
How do I beat levels more easily?
Before using an empty bolt, look for moves that put a nut on top of one of the same color. Try to clear the bolts with the fewest nuts first, and save the extra bolt for when you’re stuck.
Do I need to install an app?
No. The screw puzzle runs right in your phone or computer browser, and the level you’re on is saved.