Marble Sort Level 311 Walkthrough & Solution
Marble Sort Level 311 walkthrough: Iced Box and Four- Key Trap. Follow the verified order and keep the conveyor clear for the final clears.
Levels · 311
Levels 460–460
Levels 487–487
Levels 500–500
Levels 517–517
Levels 550–550
Marble Sort Level 311 Walkthrough & Solution
Level 311 Board Overview: Iced Box and Four- Key Trap

The verified walkthrough identifies the opening board as Iced Box and Four- Key Trap. The first confirmed moves are: Open by releasing the big blue and brown textured stones along the tray’s bottom-most rim, which pour straight into the live blue and brown receivers over on the left. Then: Reach to the far-right edge, choosing the pink stone down at the base of that column to top off the live right-side receiver. The next safe order is recorded below so the belt does not fill with bait.
The Trap in Marble Sort Level 311
- Opening bait: As the outer lanes sink, collect the green key-stone at the far left and the violet key-stone at the far right, while ignoring the orange pile hovering above the rim since your belt only fits a handful.
- Board order: When the inner-left and inner-right lanes settle, the center frost cracks, so free the red, blue, and pink icy receivers on the center block’s left half.
- Belt discipline: Use only the first verified clears here; do not spend belt space on a color without an active receiver.
Marble Sort Level 311 Step-by-Step Walkthrough
Opening: follow the safe first clears

- Open by releasing the big blue and brown textured stones along the tray’s bottom-most rim, which pour straight into the live blue and brown receivers over on the left.
- Reach to the far-right edge, choosing the pink stone down at the base of that column to top off the live right-side receiver.
- As the outer lanes sink, collect the green key-stone at the far left and the violet key-stone at the far right, while ignoring the orange pile hovering above the rim since your belt only fits a handful.
Midgame: open the next receiver path
After the opening clears, let the next exposed groups move only when their receiver is ready.
- When the inner-left and inner-right lanes settle, the center frost cracks, so free the red, blue, and pink icy receivers on the center block’s left half.
- Right after the frost falls apart, take the blue key-stone and the orange key-stone and rush them onto the belt without delay.
- Work off the opening tier to uncover the violet and green receivers underneath, moving only stones that match the current live head-row receivers to dodge a belt jam.
Cleanup: finish the remaining sequence
The final phase follows the remaining source order. Pause whenever the belt starts to fill.
- When the final pair of keys registers, the right-side lock snaps open, so pour the pink and brown backlog hard into those fresh right-side receivers.
- As the top tiers thin out and the two ‘3’ pipes kick in, hold the belt nearly empty, then pair whatever spills out with the leftover receivers to close the stage.

Level 311 Tips Recap
- As the outer lanes sink, collect the green key-stone at the far left and the violet key-stone at the far right, while ignoring the orange pile hovering above the rim since your belt only fits a handful.
- Work off the opening tier to uncover the violet and green receivers underneath, moving only stones that match the current live head-row receivers to dodge a belt jam.
- As the top tiers thin out and the two ‘3’ pipes kick in, hold the belt nearly empty, then pair whatever spills out with the leftover receivers to close the stage.
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