Game guide · LIER88
Read before your next round of Water Jug Puzzle
Read the position before choosing your next action. Measure the target number of litres using two unmarked jugs and only filling, emptying and pouring. 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.
Practice beyond the first move
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. Keep the goal in mind before your next move.
Your objective
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 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 your actions work
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. Start a new round when you are ready to try again.
An example before you play
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. Start a new round when you are ready to try again.
A useful caution
Keep the goal in view while choosing a move. You cannot measure a partial fill directly. Only the allowed actions can create a quantity. The game area remains available above the explanation.
Helpful answers for players
During a round, 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.
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. You can start a new round from the game controls.
On this page, 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. Use the labelled controls for your next action.
Which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. You can start a new round from the game controls.
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.
On this page, how many people can play here?
Solo. This is local browser play, not internet matchmaking. Use the labelled controls for your next action.
During a round, where must the target volume end up?
In either jug. The other jug may contain any legal amount. The worked example offers another way to follow the rule.
During a round, can I stop a pour halfway?
No. The source must empty or the destination must fill. A new round resets the current game.
For this game, why is an action disabled?
It would not change the current jug contents, such as filling a full jug. A new round resets the current game.
On this page, how many puzzles are included?
Six capacity-and-target combinations are selectable on the board. No download or player account is required.
