Marble Sort Level 661 Walkthrough Solution | Marble Sort 661

Marble Sort Level 661 Guide: The Dark Grey Opening Trap

This board is a masterclass in bait. You drop in, look at the bottom row of your active marbles, and think you have three easy moves. You do not. The entire challenge in Marble Sort Level 661 is built around an immediate color mismatch between the bottom row of your available marbles and the top row of your receiving containers.

The dominant colors controlling this board are Purple, Light Blue, Dark Grey, Pink, and Orange. Your Top Tray is a dense, completely visible grid of 3x3 marble clusters arranged in three columns and four rows. Below the Conveyor Belt, you have four columns of bottom Boxes waiting to be filled. There are no hidden mechanics here. No locks. No mystery elements. It is pure, raw order-of-operations logic. Make one wrong tap in the opening ten seconds, and your belt jams permanently.

The Raw Blocking Pattern in Marble Sort Level 661

To beat this board, you have to read the exact layout before tapping anything. Look at the bottom-most row of clusters in your Top Tray. From left to right, you have a Purple cluster, a Light Blue cluster, and a Dark Grey cluster. These are your only three starting options.

Now look down at the front line of your bottom Boxes. From left to right across the four columns, the top exposed Boxes are Pink, Purple, Light Blue, and Purple.

This is the central trap of Marble Sort Level 661. Notice what is missing from the bottom row? There is no Dark Grey Box available to receive marbles. If you tap that bottom-right Dark Grey cluster in the Top Tray right away, those marbles will instantly flood the Conveyor Belt and sit there. They have nowhere to go. Because the belt has extremely limited space, stranding a massive cluster of Dark Grey marbles right at the start will suffocate your midgame.

The entire layout of the lower Boxes dictates your pace. Let’s map the exact vertical stacks you are dealing with:

• Column 1: Pink sits on top, blocking Purple, Dark Grey, and Light Blue.
• Column 2: Purple sits on top, blocking a second Purple, Pink, and Dark Grey.
• Column 3: Light Blue sits on top, blocking Purple, Light Blue, and Pink.
• Column 4: Purple sits on top, blocking two Dark Grey Boxes, another Purple, and an Orange.

You cannot touch the left side of the Top Tray until you resolve the right side of the bottom Boxes. The heavy concentration of Purple in columns 2 and 4 makes Purple your absolute highest priority.

Marble Sort Level 661 Step-by-Step Walkthrough

Your opening moves require strict discipline. You must ignore the right side of the top board completely. Focus on the left and center.

Surviving the Opening Taps in Marble Sort Level 661

The first phase is all about clearing the initial Purple and Light Blue blockers without stranding useless colors on the belt.

1. Tap the bottom-left Purple cluster in the Top Tray. Send it straight down to the Conveyor Belt.
2. Watch these marbles funnel into the active Purple Boxes sitting at the top of column 2 and column 4. Clearing these opens up the board significantly.
3. Do absolutely nothing with the bottom-right Dark Grey cluster. Leave it pinned to the Top Tray. It is poison right now.
4. Tap the bottom-middle Light Blue cluster. This will drop down and feed directly into the active Light Blue Box at the top of column 3.
5. Look at what just opened up in the Top Tray. The cluster directly above the Light Blue you just cleared is Purple. Tap this middle-row Purple cluster immediately.
6. This second wave of Purple marbles will clear the second Purple Box in column 2, finally exposing the much-needed Pink Box beneath it.

Managing the Midgame Conveyor Crush in Marble Sort Level 661

Once the top layers are gone, the board transitions into a highly dangerous midgame. By clearing those initial Purple and Light Blue layers, you have exposed Orange and Pink clusters in the Top Tray. You have also exposed Dark Grey Boxes in the lower section.

1. Now is the time to finally release that bottom-right Dark Grey cluster from the Top Tray. Send it to the belt.
2. The Dark Grey marbles will route directly into the newly exposed Dark Grey Boxes in column 4.
3. Shift your attention to the left column of the Top Tray. You have an Orange cluster sitting above the now-empty space where the first Purple cluster was. Tap the Orange cluster.
4. You will likely need to float these Orange marbles on the Conveyor Belt for a moment. This is a calculated risk. You must get them out of the way to reach the Pink and Light Blue clusters trapped behind them.
5. Tap the Pink cluster on the top-right of the Top Tray. It will drop and fill the Pink Box that you uncovered in column 1.
6. Keep an eye on column 4. It holds a deep stack of Dark Grey and another Purple before you can finally reach the single Orange Box at the very bottom. You must prioritize feeding column 4 whenever a matching color is available.

Unlocking the Final Layers in Marble Sort Level 661

The endgame requires careful cleanup. If your belt isn't jammed with Orange, you are in the clear.

1. Release the top-middle Dark Grey cluster. This should finish off the remaining Dark Grey Boxes in the lower section.
2. Pull the final Pink clusters from the left side of the Top Tray. The remaining Pink Boxes in column 2 and column 3 should now be fully exposed.
3. Once the last Purple Box in column 4 clears, your stranded Orange marbles on the Conveyor Belt will automatically drain into the bottom Orange Box.
4. Dump the remaining Light Blue clusters into the final open Boxes to finish the board. Keep your taps methodical and never pull a color if its matching bottom container is buried more than two layers deep.