Zol's Vial Pour until every tube runs pure.

The rules

• Each tube holds a stack of coloured segments, and a couple of tubes start empty to give you room to work.
• Tap a tube to pick it up, tap another to pour into it.
• You can only pour a colour onto the same colour, or into an empty tube, and only while there's space.
• Keep sorting until every tube is either empty or a single pure colour. Made a mess? Undo a pour, or reset the rack.

Pick your rack

• Easy — six colours across eight tubes.
• Medium — eight colours, ten tubes.
• Hard — ten colours, twelve tubes.
• Zolified — a "Quake" tier: every 30 seconds two tubes are pooled and their colours scrambled back between them, so a rack you thought was under control keeps coming apart.

Every pour is reversible except the one you didn't think through first.

Three ways to play

The Daily is one shared rack for everyone. Free Play is unlimited fresh puzzles at any size. And Versus races you and a friend on the same rack — first to sort it wins.

Play it

Play Zol's Vial in your browser — nothing to download. Creating an account is free, and new players get a 30-day preview with full access to every game in the catalogue. After the preview, a rotating set of games is free to play each day.

More to tinker with: Zol's Plumbing, rotate pipes to route the water, Zol's Memory, match the hidden pairs, or Zol's 64, a crown-placement logic puzzle.