Game guide · LCHFY
Learn the rules of Water Jug Puzzle
Take a moment to check the current turn. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. Keep the goal in mind before your next move. 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.
One thing to notice as you play
Check the rule below as you play. A pour stops when the source is empty or the destination is full. It cannot stop at an arbitrary amount. Keep the goal in mind before your next move.
What you are aiming for
Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring.
The order of play
- 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.
How to interact with the game
Take a moment to check the current turn. Use Fill A, Fill B, Empty A, Empty B, Pour A → B and Pour B → A. The display shows current and maximum litres. Keep the goal in mind before your next move.
A useful example
The example and rules describe the same game you can play above. 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. Start a new round when you are ready to try again.
Pay attention to this rule
The example and rules describe the same game you can play above. You cannot measure a partial fill directly. Only the allowed actions can create a quantity. The game area remains available above the explanation.
Questions about this game
What is the aim of Water Jug Puzzle?
Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. The game is played locally in your browser.
When I start, 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. You can start a new round from the game controls.
During a round, 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. No download or player account is required.
For this game, which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. No download or player account is required.
On this page, 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. Keep the current game state in view while applying this rule.
On this page, how many people can play here?
Solo. This is local browser play, not internet matchmaking. Scores here do not represent cash or prizes.
On this page, where must the target volume end up?
In either jug. The other jug may contain any legal amount. The game is played locally in your browser.
During a round, can I stop a pour halfway?
No. The source must empty or the destination must fill. Use the labelled controls for your next action.
Why is an action disabled?
It would not change the current jug contents, such as filling a full jug. The instructions above use these same rules.
How many puzzles are included?
Six capacity-and-target combinations are selectable on the board. Scores here do not represent cash or prizes.