Game guide · MINDONGYL
Water Jug Puzzle: what to know before playing
Take a moment to check the current turn. 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.
A focus for your next round
The example and rules describe the same game you can play above. A pour stops when the source is empty or the destination is full. It cannot stop at an arbitrary amount. The game area remains available above the explanation.
What the game asks you to do
Keep the goal in view while choosing a move. 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.
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.
Keyboard and screen controls
Check the rule below as you play. 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.
An example to follow
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.
A common point of confusion
Check the rule below as you play. 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.
Helpful answers for players
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. The controls work with mouse or touch.
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 game is played locally in your browser.
When I start, which mistake should I avoid?
You cannot measure a partial fill directly. Only the allowed actions can create a quantity. The instructions above use these same rules.
During a round, 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.
For this game, how many people can play here?
Solo. This is local browser play, not internet matchmaking. The instructions above use these same rules.
When I start, where must the target volume end up?
In either jug. The other jug may contain any legal amount. You can start a new round from the game controls.
When I start, can I stop a pour halfway?
No. The source must empty or the destination must fill. The worked example offers another way to follow the rule.
When I start, 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. The worked example offers another way to follow the rule.
