Marble Sort Level 661 — Walkthrough and Solution

Marble Sort Level 661 is a pure logic puzzle with no hidden elements; the board is a straightforward test of sequencing and restraint. The key to victory is recognizing that the bottom row of the upper grid offers three apparent moves, but only two are safe at the start. You must resist the urge to tap the Dark Grey group on the lower right until later, as no matching container is immediately available.

The upper area is a 3x4 grid of marble clusters. The lowest row, reading left to right, holds a Purple cluster, then a Light Blue cluster, and finally a Dark Grey cluster. Above that row sit additional clusters: the second row contains a Purple cluster on the left, an Orange cluster in the middle, and a Pink cluster on the right. The third row up has a Pink cluster on the left, a Dark Grey cluster in the center, and a Light Blue cluster on the right. The topmost row holds a Dark Grey cluster on the left, a Light Blue cluster in the middle, and an Orange cluster on the right. The lower section consists of four vertical tubes, each with a visible top marble.

Marble Sort Level 661 Walkthrough

Examine the receiving tubes at the bottom. From left to right, the top exposed marbles are Pink, Purple, Light Blue, and Purple. Underneath these visible marbles, the tubes hold deeper stacks: the leftmost tube has Pink on top, then Purple below it, then Dark Grey, and Light Grey at the base. The second tube has Purple on top, then another Purple, then Pink, and finally Dark Grey. The third tube begins with Light Blue, then Purple, then Light Blue again, and Pink at the bottom. The fourth tube starts with Purple, then has two Dark Grey marbles, then another Purple, and an Orange at the very bottom.

The critical imbalance is that the bottom-right Dark Grey cluster in the upper grid has no immediate receiving tube, because the Dark Grey containers are buried deep in the fourth tube and also present in the first tube. If you tap that cluster prematurely, the marbles will occupy the conveyor belt with no destination, causing a jam. Therefore, the correct strategy is to first clear the Purple and Light Blue blockers on the left and center, which will expose the needed Dark Grey and Pink containers.

How to Beat Marble Sort Level 661 — Step-by-Step

Phase one: Clear the initial blockers

1. Tap the bottom-left Purple cluster in the upper grid. This action sends those marbles onto the conveyor, and they will fill the two available Purple tubes (the second and fourth from the left).
2. Next, tap the bottom-middle Light Blue cluster. These marbles will drop and fill the Light Blue tube that is third from the left.
3. After clearing that Light Blue, a Purple cluster is now exposed directly above it in the middle row. Tap that Purple cluster to send more Purple marbles down, which will complete the second Purple tube (the second from the left) and reveal a Pink tube beneath.

Phase two: Release the Dark Grey and manage the conveyor

1. With the right side tubes now partially cleared, you can safely tap the bottom-right Dark Grey cluster. The Dark Grey marbles will move along the conveyor and then drop into the exposed Dark Grey tubes in the fourth column.
2. Now focus on the left side of the upper grid. Tap the Orange cluster that is now in the middle row (it was above the initial Purple cluster). These Orange marbles may need to wait on the conveyor for a short time, but they will later fit into the Orange tube that is at the very bottom of the fourth column.
3. Next, tap the Pink cluster on the right side of the upper grid (it is in the second row). These Pink marbles will fill the Pink tube that was revealed in the first column.
4. Keep an eye on the fourth column, as it contains a deep stack of Dark Grey and another Purple before reaching the Orange at the bottom. Prioritize feeding that column whenever you have a matching color available.

Phase three: Finish the remaining layers

1. Release the top-middle Dark Grey cluster. This should complete the remaining Dark Grey tubes in the lower section.
2. Pull the final Pink clusters from the left side of the upper grid (the top-left and the one in the third row). These will fill the remaining Pink tubes in the second and third columns.
3. Once the last Purple tube in the fourth column is cleared, the Orange marbles that have been waiting on the conveyor will automatically drain into the Orange tube at the bottom.
4. Finally, dump the remaining Light Blue clusters (the top-middle and any others) into the open Light Blue tubes to finish the board.

Tips & tricks

• Always check the bottom row of the upper grid against the top row of the lower tubes before making your first move.
• If a color has no exposed matching tube, leave that cluster untouched until you uncover the right container.
• When you must park marbles on the conveyor, keep them to a small number and clear them as soon as a matching tube opens.

Common mistakes

• Tapping the bottom-right Dark Grey cluster at the start, which floods the conveyor and leads to a jam.
• Ignoring the order of the stacks in the lower tubes, causing you to bury needed colors.
• Moving too quickly without planning ahead, leading to a situation where no valid move is possible.

Marble Sort Level 661 FAQ

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