Marble Sort Level 691 — Walkthrough and Solution

Marble Sort Level 691 is a puzzle that hides its true difficulty behind a deceptive layout. The solution is to clear the front row of Boxes first, then handle the Connected Boxes before the Mystery Boxes, while always keeping the Conveyor Belt uncluttered.

The board has a tall central pillar of marbles, with colors arranged from top to bottom as Pink, Blue, Blue, Purple, Cyan, Light Green, and Purple. On the left side, there is a cluster of Dark Red, Cyan, and Green. The right side holds an L-shaped formation containing Dark Red, Orange, Pink, Red, Yellow, and Cyan. At the very bottom of the central pillar, you can easily reach Orange, Pink, Light Green, and Yellow marbles. Behind the front row of Boxes, there is a set of Connected Boxes for Orange and Light Green, plus a group of Mystery Boxes on the lower right.

Marble Sort Level 691 Walkthrough

The first four Boxes you see are Light Green, Pink, Yellow, and Dark Green, arranged from left to right. Once you clear these, the Connected Boxes (Orange and Light Green) become active, and the Mystery Boxes will reveal themselves after the Dark Green and Yellow Boxes are done.

The key trap is that the central pillar has Blue and Purple marbles that you cannot yet drop, because no matching Boxes are available initially. If you tap them early, they will jam the Conveyor Belt. The correct order is to feed only the colors that have open Boxes, and to keep the belt empty for the Connected Boxes.

How to Beat Marble Sort Level 691 — Step-by-Step

Phase one: Clear the front row

1. Tap the Light Green marbles at the bottom of the Top Tray to fill the Light Green Box on the left.
2. Tap the Pink marbles adjacent to them to fill the Pink Box.
3. Route the Yellow marbles from the bottom shelf to the Yellow Box on the right.
4. Locate the Dark Green marbles on the lower left and right sides, then drop them into the Dark Green Box.

Phase two: Resolve the Connected Boxes

1. Once the front row is clear, the Orange and Light Green Connected Boxes appear. Find Orange marbles on the left shelf and in the right wing.
2. Find Light Green marbles in the lower part of the central pillar.
3. Empty the Conveyor Belt of any other colors, then feed Orange and Light Green marbles alternately so that both Connected Boxes fill at the same time.
4. When both are complete, they clear, revealing a Purple Box in the third row.

Phase three: Handle the Mystery Boxes and finish

1. After the Dark Green Box clears, the Mystery Boxes on the right reveal their colors. Pause and identify them.
2. If a Mystery Box asks for Purple, tap the Purple marbles in the central pillar and lower left.
3. If a Mystery Box asks for Blue, you can now safely drop the two Blue marbles from high in the central pillar.
4. Keep an eye on the Dark Red marbles on the far edges of the left and right wings; they are likely needed for the final hidden Boxes.
5. Process the central pillar from top to bottom, but only pull a color when its matching Box is visible. Keep the Conveyor Belt as empty as possible.

Tips & tricks

• Always keep the Conveyor Belt clear: if you have more than two marbles waiting, stop and clear the matching Boxes first.
• When the Connected Boxes appear, dedicate the entire belt to Orange and Light Green until they are done.
• Before tapping the central pillar, verify that the color you are about to drop has an open Box.
• Use the Mystery Box reveals as a guide: they often dictate which color to process next.

Common mistakes

• Dropping Blue or Purple from the central pillar too early, which clogs the belt and blocks the Connected Boxes.
• Forgetting to clear the front row completely before touching the central pillar, which delays the Connected Boxes.
• Ignoring the Dark Red marbles until the end, only to find you have no space to handle them.

Marble Sort Level 691 FAQ

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