Marble Sort Level 687 — Walkthrough and Solution

Marble Sort Level 687 is a puzzle where a large diamond-shaped grid occupies the top tray, with the center packed with grey Mystery Boxes. On the far left and right, Pink and Light Blue marbles wait, but touching them early will cause a Conveyor Belt jam. The bottom boxes require a specific sequence: clear Light Pink, Red, and Yellow first, then shift to Green and Purple.

The top tray's defensive frame consists of Arrow Boxes pointing inward: on the left, a Pink Arrow points up, a White Arrow points right, a Yellow Arrow points right, and a Light Green Arrow points down. On the right, a Light Purple Arrow points up, while Dark Purple and Blue Arrows point left, trapping the center. The bottom of the top tray has three exposed boxes: one Light Green on the left, and two Red ones next to it. The lower boxes are stacked deep, with the first column hiding Green and White under Light Pink, and the fourth column a massive stack of Red.

Marble Sort Level 687 Walkthrough

The front-row bottom boxes demand Light Pink, Red, and Yellow. The lower boxes are structured so that the left column starts with Light Pink, the fourth column is a tall Red stack, and the middle columns will later reveal Green and Purple.

The key trap is that the outer Pink and Light Blue marbles are decoys; they will sit on the belt without a matching bottom box, clogging space. Also, the Arrow Boxes form a defensive frame that must be peeled back before the Mystery Boxes can be accessed.

How to Beat Marble Sort Level 687 — Step-by-Step

Phase one: Break the initial gridlock

1. Start by releasing the marbles on the exposed Red boxes at the bottom center of the top tray; this feeds the massive Red stack in column four.
2. Ignore the far-left Pink and far-right Light Blue marbles entirely for now.
3. Work the Arrow Box chains from the inside out, targeting those pointing outward or downward that are unblocked.
4. Carefully drop Yellow and Light Green marbles only when a matching bottom box is active or you have empty belt slots.
5. Clear the first Light Pink bottom box in column one, which reveals Green bottom boxes beneath.

Phase two: Manage the mid-board chaos

1. As the center Mystery Boxes flip, they skew toward Green, Purple, and Dark Blue; watch them closely.
2. Transition the left columns to Bright Green and Orange, and the right columns to Purple.
3. Monitor belt space constantly; avoid mixing Purple, Dark Blue, Red, Light Blue, White, and Yellow together.
4. Drop the Bright Green marble sitting on the Red box in the upper middle to unlock the upper Mystery Box layer.
5. Clear the Purple and Blue Arrow Boxes on the right only when a Purple bottom box is fully exposed.
6. Funnel Green marbles into the bottom left, where a large stack of Green boxes waits.

Phase three: Clear the final Mystery Boxes

1. Prioritize matching colors revealed by remaining Mystery Boxes to prevent blocking.
2. Instantly match any stray White or Yellow marbles that drop from newly opened boxes.
3. Save top-corner marbles to fill the thick, textured boxes on the far right.
4. Keep the belt clean by feeding final Red and Blue matches into their bottom boxes.

Tips & tricks

• Always have a clear plan for every marble you drop; the belt is your most limited resource.
• Use the Arrow Boxes to guide marbles into place, but never let them sit on the belt without a target.
• Prioritize clearing the Green stack in the bottom left, as it unlocks the mid-game.

Common mistakes

• Tapping the outer Pink or Light Blue marbles too early, causing a belt jam.
• Failing to clear the Light Pink bottom box early, blocking the left side.
• Letting the belt accumulate a rainbow of colors without immediate matching.

Marble Sort Level 687 FAQ

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