How to play the water sort puzzle
- Each tube holds up to four layers of coloured liquid. Tap a tube to lift its top colour, then tap another tube to pour.
- A pour is legal only into an empty tube, or onto a tube whose top layer is the same colour. The whole top run moves at once, as far as it fits.
- Fill a tube with four of one colour and it seals — that colour is finished and can never pour out again.
- Win by leaving every tube either empty or a single solid colour. Undo is unlimited, so experimenting costs nothing but moves.
- The daily puzzle is the same for every player and resets at 00:00 UTC. Endless mode adds a colour each level.
Three habits that cut your move count
- Protect your empty tubes. An empty tube is the only place a stranded colour can go. Spending one early to shuffle two layers usually costs you the level.
- Chase runs, not singles. Pouring a stack of three same-colour layers in one move is three moves saved — look for the tallest matching run before you touch anything.
- Seal a colour as soon as you can. Every finished tube is one fewer colour competing for space, and the board simplifies fast after the first two.
Frequently asked
- Is every puzzle actually solvable?
- Yes — and not by luck. The generator starts from a solved board and un-pours it step by step, keeping only moves that a legal forward pour would undo exactly. That guarantees a path home from the position you are given.
- What happens if I get stuck?
- Undo as far back as you like, or hit Restart to reset the level. The Hint button runs a solver on your current board and names the next pour, so it tells you whether you are still on a winning line at all.
- Does it work on a phone?
- Yes — it is tap-to-select, tap-to-pour, and the tubes wrap to fit a phone screen. On a desktop you can play entirely from the keyboard: number keys select tubes, U undoes, R restarts.
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