Pour colour onto matching colour until every tube holds one shade. A pour is only legal into an empty tube or onto its own colour — so the order you empty things in is the whole puzzle.
MOVES 0TUBES DONE 0/6 STREAK 0
Pouring today's tubes…
TAP A TUBE TO LIFT ITS TOP COLOUR, TAP ANOTHER TO POUR · KEYBOARD: 1–9 SELECT, U UNDO, R RESTART, H HINT
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.