Game guide · XBZJZX
Read before your next round of Water Jug Puzzle
Begin with the basic rule, then follow the result of your 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. 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.
Build familiarity through play
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. Keep the goal in mind before your next move.
What you are aiming for
Read the position before choosing your next action. 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.
From the start of a round
- 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.
Making selections and moves
Use Fill A, Fill B, Empty A, Empty B, Pour A → B and Pour B → A. The display shows current and maximum litres. The game area remains available above the explanation.
An example to follow
Begin with the basic rule, then follow the result of your action. 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.
One detail worth checking
A careful first move helps you understand the round. You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Try the rule on the board, then read the next instruction.
Common questions
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 game is played locally in your browser.
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. Use the labelled controls for your next action.
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 worked example offers another way to follow the rule.
Which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. Scores here do not represent cash or prizes.
On this page, 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 instructions above use these same rules.
During a round, how many people can play here?
Solo. This is local browser play, not internet matchmaking. You can start a new round from the game controls.
During a round, 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.
For this game, 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.
On this page, 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.
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.