Game guide · ZBHQK
Water Jug Puzzle: instructions and practice
Take a moment to check the current turn. 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. Try the rule on the board, then read the next instruction.
Six verified solvable capacity puzzles, with undo and move count. These are six levels of one game, not six separate games.
Try a more deliberate round
Take a moment to check the current turn. 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.
Aim for this result
Read the position before choosing your next action. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring.
The steps to 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.
Keyboard and screen controls
Begin with the basic rule, then follow the result of your action. 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
A careful first move helps you understand the round. 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. Try the rule on the board, then read the next instruction.
A mistake to avoid
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. Start a new round when you are ready to try again.
Answers about the rules and controls
What is the aim of Water Jug Puzzle?
Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. No download or player account is required.
For this game, 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.
For this game, 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 instructions above use these same rules.
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.
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 game is played locally in your browser.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. The worked example offers another way to follow the rule.
When I start, where must the target volume end up?
In either jug. The other jug may contain any legal amount. No download or player account is required.
When I start, can I stop a pour halfway?
No. The source must empty or the destination must fill. Keep the current game state in view while applying this rule.
Why is an action disabled?
It would not change the current jug contents, such as filling a full jug. No download or player account is required.
On this page, how many puzzles are included?
Six capacity-and-target combinations are selectable on the board. Keep the current game state in view while applying this rule.
