Game guide · GDSZY189
The Water Jug Puzzle playbook
Check the rule below as you play. 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. 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.
Bring this focus to a round
Keep the goal in view while choosing a move. 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
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 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.
How to use the controls
The example and rules describe the same game you can play above. 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.
Follow the 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. Keep the goal in mind before your next move.
Notice this detail
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Keep the goal in mind before your next move.
Read these answers for extra help
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. The worked example offers another way to follow the rule.
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. No download or player account is required.
During a round, which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Use the labelled controls for your next action.
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. Keep the current game state in view while applying this rule.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. Use the labelled controls for your next action.
On this page, 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.
On this page, can I stop a pour halfway?
No. The source must empty or the destination must fill. No download or player account is required.
Why is an action disabled?
It would not change the current jug contents, such as filling a full jug. The worked example offers another way to follow the rule.
During a round, how many puzzles are included?
Six capacity-and-target combinations are selectable on the board. The controls work with mouse or touch.
