Game guide · JXLGGC
Water Jug Puzzle: what to know before playing
The example and rules describe the same game you can play above. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. The game area remains available above the explanation. Choose one of six capacity-and-target puzzles. Both jugs begin empty.
Six verified solvable capacity puzzles, with undo and move count. These are six levels of one game, not six separate games.
Build familiarity through play
Read the position before choosing your next action. A pour stops when the source is empty or the destination is full. It cannot stop at an arbitrary amount.
The goal to keep in mind
A careful first move helps you understand the round. 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.
Making your moves
- 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.
The controls to know
Read the position before choosing your next action. Use Fill A, Fill B, Empty A, Empty B, Pour A → B and Pour B → A. The display shows current and maximum litres. Try the rule on the board, then read the next instruction.
Work through an example
Begin with the basic rule, then follow the result of your action. 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.
A useful caution
Take a moment to check the current turn. You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Try the rule on the board, then read the next instruction.
If you are unsure
When I start, 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 instructions above use these same rules.
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. Scores here do not represent cash or prizes.
When I start, 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. Scores here do not represent cash or prizes.
On this page, which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Keep the current game state in view while applying this rule.
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. The controls work with mouse or touch.
On this page, how many people can play here?
Solo. This is local browser play, not internet matchmaking. A new round resets the current game.
Where must the target volume end up?
In either jug. The other jug may contain any legal amount. The worked example offers another way to follow the rule.
During a round, can I stop a pour halfway?
No. The source must empty or the destination must fill. Scores here do not represent cash or prizes.
Why is an action disabled?
It would not change the current jug contents, such as filling a full jug. Use the labelled controls for your next action.
On this page, how many puzzles are included?
Six capacity-and-target combinations are selectable on the board. You can start a new round from the game controls.
