Game guide · SJZWEISHEN
Water Jug Puzzle: rules and examples
Check the rule below as you play. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. Try the rule on the board, then read the next instruction. 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.
A focus for your next round
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. Start a new round when you are ready to try again.
The purpose of your moves
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.
Work through the instructions
- 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
The board gives you the information needed for the 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.
A useful example
Use the controls beside the game rather than guessing the rules. 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.
An important reminder
Take a moment to check the current turn. You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Keep the goal in mind before your next move.
Answers about the rules and controls
For 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 controls work with mouse or touch.
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.
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. No download or player account is required.
Which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. The controls work with mouse or touch.
For this game, 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. No download or player account is required.
During a round, how many people can play here?
Solo. This is local browser play, not internet matchmaking. A new round resets the current game.
When I start, where must the target volume end up?
In either jug. The other jug may contain any legal amount. Use the labelled controls for your next action.
For this game, 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.
On this page, 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.
On this page, how many puzzles are included?
Six capacity-and-target combinations are selectable on the board. Scores here do not represent cash or prizes.