Game guide · YCBY120
Learn the rules of Water Jug Puzzle
The example and rules describe the same game you can play above. 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. 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.
A focus for your next round
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.
The challenge in front of you
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.
Follow these playing steps
- 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.
Your inputs
Use Fill A, Fill B, Empty A, Empty B, Pour A → B and Pour B → A. The display shows current and maximum litres.
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. Keep the goal in mind before your next move.
One detail worth checking
Read the position before choosing your next action. You cannot measure a partial fill directly. Only the allowed actions can create a quantity.
More answers before you play
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. The instructions above use these same rules.
For this game, 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.
During a round, 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. A new round resets the current game.
Which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. A new round resets the current game.
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. You can start a new round from the game controls.
How many people can play here?
Solo. This is local browser play, not internet matchmaking. The game is played locally in your browser.
Where must the target volume end up?
In either jug. The other jug may contain any legal amount. A new round resets the current game.
When I start, can I stop a pour halfway?
No. The source must empty or the destination must fill. Use the labelled controls for your next action.
On this page, 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.
On this page, how many puzzles are included?
Six capacity-and-target combinations are selectable on the board. A new round resets the current game.
