Stack n Sort

Color Sort, Screw & Bolt Sort · Updated Apr 12, 2026

About Stack n Sort

Miscount the rope length by one ring and the board freezes—no undo, no second chance. Stack n Sort treats a wrong move as permanent: the only recovery is a full restart. That reset becomes the real teacher, forcing you to memorise which slide sequence led to a dead-lock and which path kept the colours flowing. Each replay trims the guesswork, turning a single slip into a sharper plan for the next attempt.

Stack n Sort is a vibrant color-matching puzzle where you slide rings along ropes to group them by shade. It's all about precision and planning—each move needs to be thoughtful to avoid getting stuck. There's a real satisfaction in watching the colors line up perfectly. Simple to learn but tricky to master, it's that clean, strategic sorting that keeps you coming back for one more try.

How to Play Stack n Sort

Click and drag a rope to slide a ring onto an adjacent rope.
Ropes can hold a limited number of rings—overloading one locks the board.
Only the topmost ring on a rope is moveable; you cannot reach rings buried underneath.
Group all rings of the same colour onto a single rope to clear that rope from the board.
A rope is complete only when it contains every ring of one colour and no others.
If you run out of moves before all ropes are grouped, you must restart the puzzle.

Game Features

Sliding rings along connected ropes creates a unique spatial constraint not found in tube-based sorters.
Each rope has a fixed capacity, so you must balance ring distribution to avoid blocking yourself.
Puzzles start with 3 colours on short ropes and scale up to 6 colours with longer, branching rope paths.
The 3D rope layout rotates freely, letting you inspect ring order from any angle before sliding.

Tips & Strategies

Before sliding, count the empty spaces on the target rope—if you fill it completely, you cannot retrieve the top ring until the rope is cleared.
Build a mental map of which colour rings are buried under others; a single misplaced slide can trap a colour you need later.
When stuck, restart immediately rather than making random moves—each reset teaches you one precise sequence that works.

Frequently Asked Questions

Can I undo a slide if I put a ring on the wrong rope?

No. Stack n Sort has no undo button. Once a ring slides onto a rope, that move is permanent. The only way to recover from a mistake is to restart the puzzle.

What happens when a rope reaches its capacity?

That rope becomes locked—no rings can be added or removed from it until the rope is fully grouped by colour and cleared from the board.

How do I know which rope a ring can slide to?

A ring can only slide from the top of its current rope to the top of an adjacent rope that shares a connection on the 3D model. The path is visible as a straight line between the two ropes.