Marble Sort Level 312 Walkthrough & Solution
Marble Sort Level 312 walkthrough: Central Tunnel and Ice Block Trap. Follow the verified order and keep the conveyor clear for the final clears.
Levels · 312
Levels 460–460
Levels 487–487
Levels 500–500
Levels 517–517
Levels 550–550
Marble Sort Level 312 Walkthrough & Solution
Level 312 Board Overview: Central Tunnel and Ice Block Trap

The verified walkthrough identifies the opening board as Central Tunnel and Ice Block Trap. The first confirmed moves are: Open by choosing the yellow, red, and pink stones so they pour into the head-row yellow, red, and pink receivers, while steering clear of the cyan and dark blue stones that sit exposed. Then: Empty the head-row brown receiver next, pulling the brown stones off the tray’s far-left rim. The next safe order is recorded below so the belt does not fill with bait.
The Trap in Marble Sort Level 312
- Opening bait: With the entire first row gone, the second layer slides forward demanding Brown, Pink, Green, and Pink, so start pulling from the central Tunnel only when the corresponding bottom Boxes are active.
- Board order: Tap the exposed Pink and Green elements to feed the current front row, and as the nearby slots clear, let the ice on the inner columns shatter.
- Belt discipline: Use only the first verified clears here; do not spend belt space on a color without an active receiver.
Marble Sort Level 312 Step-by-Step Walkthrough
Opening: follow the safe first clears

- Open by choosing the yellow, red, and pink stones so they pour into the head-row yellow, red, and pink receivers, while steering clear of the cyan and dark blue stones that sit exposed.
- Empty the head-row brown receiver next, pulling the brown stones off the tray’s far-left rim.
- With the entire first row gone, the second layer slides forward demanding Brown, Pink, Green, and Pink, so start pulling from the central Tunnel only when the corresponding bottom Boxes are active.
Midgame: open the next receiver path
After the opening clears, let the next exposed groups move only when their receiver is ready.
- Tap the exposed Pink and Green elements to feed the current front row, and as the nearby slots clear, let the ice on the inner columns shatter.
- After the inner-right lane thaws, snatch those green stones at once to fill the waiting green receiver, but keep the orange and yellow icy receivers on hold because no orange or yellow receiver is live yet.
- Clear the second layer of bottom Boxes to rip the board wide open, then clean up the garbage you left behind while the third layer requests Light Blue.
Cleanup: finish the remaining sequence
The final phase follows the remaining source order. Pause whenever the belt starts to fill.
- Now finally tap the Light Blue box you saved from the very start, and route the central Tunnel’s final marbles quickly before they sit on the belt.
- Send the stray purple and orange stones at the top corners only after their receivers rotate to the front slot, then clear the leftover cyan and green stones on the right side to fire the final clear.

Level 312 Tips Recap
- With the entire first row gone, the second layer slides forward demanding Brown, Pink, Green, and Pink, so start pulling from the central Tunnel only when the corresponding bottom Boxes are active.
- Clear the second layer of bottom Boxes to rip the board wide open, then clean up the garbage you left behind while the third layer requests Light Blue.
- Send the stray purple and orange stones at the top corners only after their receivers rotate to the front slot, then clear the leftover cyan and green stones on the right side to fire the final clear.
Related Articles
blog
Marble Sort Dispensers & Locks Guide: Key Order
Learn how Dispensers and Locks work in Marble Sort: find the hidden Key, use Pop-It and Numbered Dispensers without clogging the belt, and beat Level 805.
blog
Marble Sort Locked Pallet Guide: Key Queue Timing
Master the Locked Pallet in Marble Sort: how the key queue works, why keys ignore color, and the timing tricks that stop locked boxes from stalling your run.
blog
Marble Sort Tunnel Guide: Release Boxes Safely
Learn how the Marble Sort Tunnel works: what the number really means, how to release stored boxes safely, Timeout Tunnel rules, and smart clearing strategy.
Was this helpful?
Thanks for the feedback!