Water Sort

01 / Goal & rules

1. Pour the contiguous top-color run from one tube to another. The destination must be empty or have the same top color.
2. Each tube holds four layers. Pour only as much of the run as fits; the total amount of every color is conserved.
3. Every nonempty tube must contain four layers of one color to win. A half-full uniform tube is not complete. Easy has 3 colors, normal 4 and hard 5, with two spare tubes.

02 / Controls & guided practice

1. Select a source tube, then a destination. Select the same tube again to cancel.
2. Undo reverses the previous pour, but adds a move and an additional undo penalty.

Choose Learn by doing above to try coached moves on a real practice board. Your current game is preserved; tutorial results are never recorded.

03 / How scoring works

1. On completion: max(0, 1,000,000 − moves×3,000 − undos×5,000 − hints×200,000). Unfinished tubes score 0.

Time is informational and is not part of this score formula. Scores are derived from game state; different games use different scales.

04 / A thought for your next move

1. Try keeping one spare tube free as workspace.
2. Plan how to expose buried colors, not just how to match current tops.