Almost every new player learns Water Sort the same way: tap things that look poutable and hope. That works until roughly the point where five colours share seven bottles, and then it stops working all at once. The fix is not faster reflexes or more tries — it is spending ten seconds looking at the board before the first pour.
Read the board before you touch it
Three things are worth noting before your first move, in this order:
- How much free space exists. Count the empty units across all bottles, not just the empty bottles. Two empty bottles is eight free units; one empty bottle plus two half-full bottles might also be free space, but only for specific colours.
- How fragmented each colour is. A colour sitting as four units in one bottle is finished. A colour split as 2+1+1 across three bottles needs at least two pours and possibly a detour. Write nothing down — just notice which colour is closest to complete.
- What is buried and how deep. A colour at the very bottom of a bottle, under three different colours, is the thing that will eventually need the most space. Plan around it rather than discovering it late.
Habit 1: always be trying to empty a bottle
Beginners aim to complete colours. Strong players aim to empty bottles, because an empty bottle can accept any colour and therefore keeps every future option alive. Completing a colour is a nice by-product; regaining a completely empty bottle is the thing that keeps the puzzle solvable.
Practical version: if you have a choice between a pour that finishes a colour and a pour that empties a bottle, and the finish can still be made later, take the empty.
Habit 2: never split a colour you do not have to
Partial pours are legal, and they are the single biggest source of avoidable trouble. If three yellow units pour into a bottle with room for two, you have turned one yellow group into two and created extra work that needs extra space. Before pouring, check that the target has room for the whole block. If it does not, look for a different target or a different move.
The exception: a deliberate partial pour is fine when the unit you leave behind is the one you need on top for the very next move. If you cannot name that next move, do not do it.
Habit 3: do not spend an empty bottle on a single unit
Dropping one unit into an empty bottle converts your most flexible resource into your least flexible one. It is sometimes necessary — usually to expose a colour directly underneath — but it should always be a decision, not a reflex. Ask what the move exposes. If the answer is "nothing useful", find another pour.
A routine for the first ten levels
- Scan for any pour that finishes a colour outright. Take it if it costs no empty bottle.
- Scan for any pour that empties a bottle completely. These are usually the best moves on the board.
- Scan for pours that merge two fragments of the same colour with room to spare. These cost nothing and simplify the board.
- Only then consider using an empty bottle, and only if it exposes something you need.
- If nothing on that list exists, you are already in trouble — undo one or two moves rather than pouring at random.
Practise the routine on levels 6 to 10 in the browser game. Those boards have four colours and two spare bottles, which is enough room to recover from one mistake but not two.
When you feel stuck
- Undo early. The best moment to undo is the move right after the one you regret, not ten moves later.
- Use the hint as a teacher, not a crutch. Guess the move first, then press hint and compare. When they differ, work out why the suggested move keeps more space open.
- Restart without guilt. A fresh attempt on a board you now understand takes two minutes and teaches more than grinding a lost position.
Where to go next
The strategy guide turns these habits into a way of comparing two candidate moves, and common mistakes lists the specific errors to watch for. When you reach the hard tier, the techniques page gives you named patterns to reach for.