Water sort, ball sort, nut sort, and hoop sort look different but play the same. You move the top item out of one container into another, and you win when every container holds a single color or nothing at all. The rules are identical underneath the skin, so one strategy guide covers all of them. This is that guide, with a dedicated section near the end for the few things that differ from game to game.
What Is a Color-Sort Puzzle?
Every color-sort variant gives you a set of containers (tubes, poles, bolts, whatever the theme calls them), each holding a stack of colored items. You can take only the item on top of a stack, and you can only place it into a container that is empty or whose top item already matches the color you're moving. The puzzle is solved when every container is either empty or filled with one uniform color.
That's the entire rule set. Everything below is about playing it well.
Step-by-Step Strategy for Beginners
Step 1: Read the Board Before You Touch It
Before making a move, scan every container. Note which colors already have two or more matching items stacked together; those are your closest wins. Note which colors are split across several containers; those will need the most work. Five seconds of reading saves far more than five seconds of undoing bad moves.
Step 2: Get an Empty Container Open
An empty container is the only place that accepts any color. Without one, every move has to match an existing top item, and your options shrink fast. Your first few moves should usually be whatever gets you to at least one empty container, even if it doesn't look like progress yet.
Step 3: Finish One Color, Then Move On
Don't spread effort across four colors at once. Pick whichever color is closest to complete and push it to the finish. A completed container is done for good: it can't be un-solved, and it usually becomes free workspace for everything else.
Step 4: Think Two or Three Moves Ahead
Before committing to a move, ask what it sets up. Does it open a container? Does it expose a color you need? Does it enable a merge on your next move? A move that looks fine in isolation but leads nowhere is worse than a move that looks smaller but opens a chain.
Advanced Techniques
Work Bottom-Up
If a color you need is buried under others, you have to clear what's on top of it. There's no way around that. Do it with a plan: know where each blocker is going before you lift it, rather than shuffling blockers around and hoping.
Keep Colors Together
Every time a color ends up split across an extra container, it costs more moves to reassemble later. When you have a choice, consolidate a color into fewer containers rather than more, even if it costs an extra move now.
Use Empty Containers as a Buffer
An empty container serves two purposes: finishing colors, and temporary storage for whatever's blocking you. Move a blocking color into it, grab what was underneath, then move the blocker to its real destination (or back). You solve most non-trivial levels with this buffer pattern.
Look for Move Chains
The strongest moves unlock the next move instead of only looking good on their own. Moving item A exposes item B, which completes a stack, which frees a container. Before you commit to a move, see if you can name what it sets up. If you can't, it's probably not the move.
Variant-Specific Notes
The core strategy above works for every color-sort game, but three things are worth knowing about specific variants.
Hoop sort has a capacity twist the others don't. Most water sort and ball sort boards use containers of equal height, so any container can end up holding any color. Hoop sort levels often mix short and tall poles on the same board, and a short pole fills up before you expect it to. Two things follow from this: count each pole's height against how many hoops of a color exist before you commit to a merge, and prefer tall poles as the permanent home for a color, since they absorb more before overflowing. Use short poles as temporary scratch space for one or two blockers, not as a color's final destination.
Water sort's "pouring" is the same move as everyone else's. It looks different: layers of liquid animate as they transfer instead of a single ball or nut hopping over. But a pour that moves several consecutive same-color layers at once counts as one move, not several. The strategy above applies without adjustment.
Nut sort, ball sort, and bolt sort differ only in name. Whatever the app calls the pieces (nuts on bolts, balls in tubes, rings on poles), the underlying logic is the same graph-search problem. Solve one, and you already know how to solve the others.
When to Use a Solver
Some levels are hard, and some are unsolvable outright: no sequence of legal moves reaches a finished board. If you've been stuck for more than a few minutes, that's the signal to stop guessing and check. ChromaOracle runs breadth-first search, which finds the shortest possible solution whenever one exists, and tells you at once when one doesn't.
If your board has hidden or unknown colors, Mystery Mode analyzes every possible arrangement behind the unknowns and surfaces the moves that are safe no matter what they turn out to be. That covers water sort, ball sort, nut sort, and hoop sort alike.
Common Mistakes to Avoid
- Spending your last empty container too early: it's your only flexible resource; keep at least one open as long as you can.
- Splitting a color across more containers: every split adds moves you'll need later to undo it.
- Ignoring buried colors: a color trapped at the bottom of a container only gets harder to reach the longer you wait.
- Moving without a plan: every move should set something up. Being legal isn't a good enough reason to make it.
- Assuming a hard level must be solvable: some aren't; check before you burn twenty minutes on one.
Frequently Asked Questions
Are water sort, ball sort, nut sort, and hoop sort really the same puzzle?
Mechanically, yes, in the overwhelming majority of apps. The visual theme changes (liquid, balls, nuts, rings), but the move rules (take the top item, place it on an empty or matching container) and the optimal strategy are identical. The one real exception is hoop sort's mixed pole heights, covered above.
What's the best first move?
Whichever move either opens an empty container or merges a color that's already mostly together. Avoid a first move that scatters a color across an additional container. You'll pay for it later.
Can a color-sort puzzle be unsolvable?
Yes. Some board layouts have no sequence of legal moves that reaches a fully sorted state. A solver detects this right away, instead of you finding out after ten minutes of trying.
How many moves does a typical level take?
It depends on the board size and how mixed the colors start out. Small boards can solve in under a dozen moves; larger or more scrambled ones can take thirty or more. A BFS-based solver finds the minimum for any given board.
How do I handle a level with hidden colors?
Enter the unknowns as unknowns and use Mystery Mode. It works out which moves are safe regardless of what the hidden colors turn out to be, so you can make progress before every color is revealed, then re-enter the board as more information appears.