Game guide · GZFDWZ
Water Jug Puzzle: rules and examples
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. 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.
A focus for your next 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.
Understand the aim
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. The game area remains available above the explanation.
How a round unfolds
- 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.
Controls
Keep the goal in view while choosing a move. Use Fill A, Fill B, Empty A, Empty B, Pour A → B and Pour B → A. The display shows current and maximum litres.
Try this example
Check the rule below as you play. 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.
Pay attention to this rule
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.
Helpful answers for players
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. A new round resets the current game.
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 instructions above use these same rules.
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.
On this page, which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. The instructions above use these same rules.
When I start, 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. Scores here do not represent cash or prizes.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. Keep the current game state in view while applying this rule.
On this page, where must the target volume end up?
In either jug. The other jug may contain any legal amount. Keep the current game state in view while applying this rule.
When I start, can I stop a pour halfway?
No. The source must empty or the destination must fill. You can start a new round from the game controls.
During a round, why is an action disabled?
It would not change the current jug contents, such as filling a full jug. The controls work with mouse or touch.
When I start, how many puzzles are included?
Six capacity-and-target combinations are selectable on the board. No download or player account is required.