The smallest number of moves that can reach the target from empty jars. It is worked out by a full search, so it is exact.

Is the target always possible?

Yes. A puzzle is only offered when a solution exists.

Do I have to hit par?

No. Any solution wins. Par is there for people who like to find the shortest way.

Three jars of different sizes and a tap. Fill, empty and pour your way to an exact amount in the fewest moves you can.

Jar Fill

0% · Getting ready

A real run of the game, recorded with captions and no sound.

Tap a jar to select it, then choose Fill from tap or Empty it. Tap a second jar instead to pour the first into it.
Pouring stops when the jar you pour into is full or the jar you pour from is empty. Nothing is spilled or lost.
Each jar has marker lines for its size, and the number under it shows exactly what it holds.
Get exactly the target amount into any jar. The number of moves is counted, and the fewest possible is shown as par.

Controls: mouse or touch. Made by CalcoTools.

Work backwards from the target. Ask which jar sizes could leave exactly that amount when one is topped up or poured off.
Pouring from a full small jar into an empty larger jar and refilling is how most puzzles get started.
Filling and emptying are single moves, so a clean pour is often cheaper than two fills.
Undo is unlimited, so test an idea and take it back if it does not lead anywhere.

What is par?: The smallest number of moves that can reach the target from empty jars. It is worked out by a full search, so it is exact.
Is the target always possible?: Yes. A puzzle is only offered when a solution exists.
Do I have to hit par?: No. Any solution wins. Par is there for people who like to find the shortest way.