Game guide · JZJSBYY
Rules, controls and help for Water Jug Puzzle
Check the rule below as you play. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. Choose one of six capacity-and-target puzzles. Both jugs begin empty. Keep the goal in mind before your next move.
Six verified solvable capacity puzzles, with undo and move count. These are six levels of one game, not six separate games.
An idea for your next attempt
Begin with the basic rule, then follow the result of your action. A pour stops when the source is empty or the destination is full. It cannot stop at an arbitrary amount. Try the rule on the board, then read the next instruction.
What you are aiming for
The board gives you the information needed for the next action. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. Start a new round when you are ready to try again.
From the start of a round
- Choose one of six capacity-and-target puzzles. Both jugs begin empty.
- Fill a jug to its capacity, empty it completely, or pour from one jug into the other.
- A pour stops when the source is empty or the destination is full. It cannot stop at an arbitrary amount.
- Reach the target quantity in either jug. Undo lets you try another route.
Getting comfortable with the controls
Check the rule below as you play. Use Fill A, Fill B, Empty A, Empty B, Pour A → B and Pour B → A. The display shows current and maximum litres.
Work through an example
Take a moment to check the current turn. With 3- and 5-litre jugs, fill the 5-litre jug and pour into the 3-litre jug. The 5-litre jug now contains 2 litres. The game area remains available above the explanation.
A common point of confusion
Use the controls beside the game rather than guessing the rules. You cannot measure a partial fill directly. Only the allowed actions can create a quantity. The game area remains available above the explanation.
A few questions answered
During a round, what is the aim of Water Jug Puzzle?
Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. Use the labelled controls for your next action.
During a round, how do the controls work?
Use Fill A, Fill B, Empty A, Empty B, Pour A → B and Pour B → A. The display shows current and maximum litres. The controls work with mouse or touch.
On this page, can you show an example?
With 3- and 5-litre jugs, fill the 5-litre jug and pour into the 3-litre jug. The 5-litre jug now contains 2 litres. The game is played locally in your browser.
For this game, which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Use the labelled controls for your next action.
During a round, what rules and limits are used here?
Six verified solvable capacity puzzles, with undo and move count. These are six levels of one game, not six separate games. A new round resets the current game.
How many people can play here?
Solo. This is local browser play, not internet matchmaking. No download or player account is required.
During a round, where must the target volume end up?
In either jug. The other jug may contain any legal amount. You can start a new round from the game controls.
Can I stop a pour halfway?
No. The source must empty or the destination must fill. Scores here do not represent cash or prizes.
When I start, why is an action disabled?
It would not change the current jug contents, such as filling a full jug. You can start a new round from the game controls.
How many puzzles are included?
Six capacity-and-target combinations are selectable on the board. The game is played locally in your browser.