1. Keep one tube flexible
On a board with two empty tubes, it is tempting to treat both as free parking. That often creates the first real dead end. If you put red in one and green in the other while their matching layers remain buried, every other tube must now accept only its own top colour. A single mismatch can stop all progress.
Use an empty tube with an exit plan. Suppose moving orange exposes blue, and blue can immediately pour onto another blue run. That sequence is productive: the orange temporarily occupies the buffer, the blue consolidation creates space, and the orange can later move onto its match. A random top colour with no visible partner is much more expensive.
2. Consolidate before you complete
Joining two matching top runs is usually strong because it creates room and turns scattered pieces into one block. But filling a tube to four is not automatically the best move. If completing purple consumes the only open destination while the remaining tubes have incompatible tops, you may have finished one colour and frozen five others. Look one move beyond the satisfying completion.
Once a tube is complete, leave it alone unless breaking it clearly unlocks the board. A finished tube reduces the active puzzle by one colour and one container. Repeatedly borrowing from completed colours makes the position harder to reason about.
3. Work from exposed information
You do not need to memorise every hidden layer. Focus on the top two. A useful move either joins the visible top colour or reveals a second colour that has somewhere to go. If neither is true, the pour probably only rearranges the problem.
Harder boards sometimes require a temporary “wrong-looking” move into an empty tube. That is fine when it opens a chain: reveal blue, join blue, expose yellow, finish yellow, then return the temporary colour. The empty tube is a workspace, not a trophy to keep untouched forever.
