A Hoop Sort puzzle is solved by moving colored hoops between poles until every pole holds a single color. The reliable approach is to protect at least one empty pole, finish one color completely before starting another, and check each pole's remaining capacity before you commit to a move.
What Is Hoop Sort?
Hoop Sort is a color-sorting puzzle where colored rings are threaded onto vertical poles. You can only take the top hoop from a pole, and you can only place it on a pole that is empty or whose top hoop already matches its color.
The rules are the same family as Ball Sort and Water Sort. The difference that actually matters for strategy is capacity. Ball Sort boards almost always use tubes of equal height, while Hoop Sort levels sometimes mix short and tall poles on the same board. A short pole fills up faster than you expect, and a plan that ignores that is how most avoidable dead ends happen.
Step-by-Step Strategy for Beginners
Step 1: Count Capacity Before You Count Colors
Look at how tall each pole is and how many hoops of each color the board contains. If a color has six hoops and no pole is six tall, that color has to end up split, which usually means the level is not what you think it is. Reading capacity first stops you from planning a merge that cannot physically finish.
Step 2: Open an Empty Pole Early
An empty pole is the only place an arbitrary hoop can go. Without one, every move needs a color match, and your options collapse quickly. Clearing a nearly-empty pole is often worth several moves that look like they make no progress.
Step 3: Finish One Color Completely
Partial progress on four colors is worse than finished progress on one. A completed pole is permanently out of play, and removing a pole from the board is the single largest simplification you can make to it.
Step 4: Check the Destination Has Room
This is the mistake specific to Hoop Sort. Before moving a run of hoops toward a pole, confirm the pole can actually hold all of them. Filling a short pole to the brim with the right color still traps whatever sits underneath, and you have spent moves to make the board harder.
Advanced Techniques
Prefer Tall Poles as Collection Points
When you choose where a color will live, choose the tallest available pole. Tall poles absorb more of a color before overflowing, which reduces how often that color ends up scattered across the board.
Keep Short Poles as Scratch Space
A short pole makes a poor home for a color but a good temporary holding spot. Using short poles for one or two blockers, and tall poles for finished colors, keeps your capacity working for you instead of against you.
Unbury From the Top Down, With a Destination in Mind
If a color you need sits three hoops deep, decide where all three blockers are going before you move any of them. Lifting blockers with no plan spreads them across the board and turns one buried color into three.
Look for Chains, Not Moves
A strong move usually enables the next one. Moving a blocker exposes a match, the match completes a stack, and the completed stack frees a pole. If you cannot name what your move unlocks, it is probably not the move.
When to Use a Solver
Some Hoop Sort levels are genuinely hard, and some configurations have no solution at all. If you are cycling through the same positions by trial and error, use ChromaOracle to check whether the board is solvable and to see the shortest path.
The solver runs breadth-first search, which guarantees the minimum number of moves whenever a solution exists. It also supports per-pole capacity, so mixed-height boards are entered exactly as your game shows them, and Mystery Mode for levels that hide hoop colors until they are revealed.
Common Mistakes to Avoid
- Ignoring pole height - A short pole fills early and traps everything beneath it.
- Spending the last empty pole - Keep one open for as long as you can afford to.
- Scattering a color across many poles - Every extra pole holding one stray hoop is a future problem.
- Moving blockers without a destination - Decide where they go before you lift the first one.
Frequently Asked Questions
Is Hoop Sort the same as Ball Sort?
The move rules are the same. The practical difference is that Hoop Sort levels more often mix pole heights, so capacity planning matters more than it does in a typical Ball Sort board.
Can I move several matching hoops at once?
It depends on the game. Some versions move a whole matching run in one action, others move one hoop at a time. The optimal order of moves is the same either way, so the strategy above applies to both.
What is the best opening move in Hoop Sort?
Usually whichever move either empties a pole or merges two partial stacks of the same color. Avoid opening moves that split a color across an additional pole.
Can a Hoop Sort level be unsolvable?
Yes. Some boards have no sequence of legal moves that reaches a fully sorted state, and mixed pole heights make this more common than in uniform-capacity variants. A solver detects it immediately.
How do I handle levels with hidden hoops?
Enter the hidden ones as unknowns and let Mystery Mode work out which moves are safe no matter what the hidden colors turn out to be. Play those moves first, then re-enter the board once more colors are revealed.