Stack Sort
Stack Sort asks you to reorganize a grid of mixed blocks until you obtain columns each composed of a single unique color. First, you observe the available stacks and spot the colors already partially grouped. Then you transfer blocks between columns to bring identical elements closer and create a more readable structure. The principle seems straightforward, but it relies on precise choices, because each move changes the overall balance of the board. If you use a useful column too early, you risk blocking an important sequence. Otherwise, by keeping enough space to maneuver, you more easily prepare the next groupings and keep multiple solutions open.
The difficulty mainly comes from the order of actions. A color that is well advanced may make you want to finish it immediately, yet it is sometimes wiser to delay that stack to clear another area of the board. You must evaluate what can be solved right away, what requires preparation, and what must wait until a column serves as a transit zone. The puzzles progressively become more demanding, not because the rules change, but because the combinations require better spatial reading and more anticipation. Each situation pushes you to compare options, correct a bad idea, and then rebuild a cleaner strategy. This clear logic, combined with a pleasant 3D visual presentation, makes each success very satisfying. Have fun!