Game guide · SQXQKJ
Water Jug Puzzle: how a round works
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. Choose one of six capacity-and-target puzzles. Both jugs begin empty. Keep the goal in mind before your next move.
Six verified solvable capacity puzzles, with undo and move count. These are six levels of one game, not six separate games.
Take a closer look while playing
The board gives you the information needed for the next action. A pour stops when the source is empty or the destination is full. It cannot stop at an arbitrary amount. Keep the goal in mind before your next move.
What counts as success
Check the rule below as you play. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. Keep the goal in mind before your next move.
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.
Input guidance
Use the controls beside the game rather than guessing the rules. 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.
One way to understand the rules
The example and rules describe the same game you can play above. 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 game area remains available above the explanation.
Where a round can go wrong
The example and rules describe the same game you can play above. 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.
Clarifying the way this game works
On this page, 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.
On this page, 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.
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. 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. The controls work with mouse or touch.
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.
How many people can play here?
Solo. This is local browser play, not internet matchmaking. A new round resets the current game.
On this page, 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. The instructions above use these same rules.
During a round, why is an action disabled?
It would not change the current jug contents, such as filling a full jug. Keep the current game state in view while applying this rule.
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.
