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Marble Sort Level 551 Solution: Numbered Tunnel Flood Trap

Medium ★★★☆☆ ~38 moves

Screenshots

Marble Sort Level 551 screenshot 1Marble Sort Level 551 screenshot 2Marble Sort Level 551 screenshot 3Marble Sort Level 551 screenshot 4

Step-by-step solution

Quick answer
  1. 1) Open by sending the Brown sphere on the lower-left of the Top Tray straight into the front Brown Box to start the chain.
  2. 2) Immediately tap the two Black marbles on the bottom right; they have no open box yet, so they sit on the Conveyor Belt and expose the Dark Blues hidden behind them.
  3. 3) Route those now-visible Dark Blue marbles into the bottom Box on the front left, then pull the remaining visible Browns from the upper left to finish the front row.
  4. 4) As that front line clears, the four numbered side Tunnels tick from 2 down to 0 and flood the board with Black and Purple marbles toward the chute.
  5. 5) Sort the Black marbles you parked on the belt into the newly opened Black boxes to free space, and route the spilled Purple into the active Purple bottom Box.
  6. 6) Resist the Light Blue and Orange marbles in the top center even though they look easy, since their receivers are still trapped in the back rows.
  7. 7) Once the Black and Purple bottleneck clears, the back rows demand Light Blue, Pink, and textured Green, so unload the center of the tray into those boxes.
  8. 8) Feed the textured yarn marbles (pink, green, yellow) to their receivers the moment those slide forward, and only pull a color when its box is one clear away.

Level 551 Numbered Tunnel Flood Trap

sphere Sort Level 551 looks as one straightforward shade-matching puzzle until one realize how tightly the opening taps are restricted by the bottom rows.

this dominant shades clogging this board first are Brown, Dark Blue, and Black.

the upper rack sits one wide, dense grid from spheres using several uniquely rough yarn-style marbles scattered throughout.

However, this real threat here sits this built from azure side Tunnels flanking this left and right edges.

Each from those Tunnels has a '2' stamped on it.

If one bring this bad shades down into this Conveyor track before dealing using this head line from lower cases , those side Tunnels shall activate at this worst possible time plus instantly end your run.

Level 551 Four-Tunnel Setup

one want into understand exactly how this board sits layered before making a single tap.

this very lower line resting just above this chute is chopped up.

over this far west, one hold one Brown marble and one Pink marble.

on this middle rests one wide, flat violet bumper blocking direct access into the center columns.

over this bottom right, you have two Black marbles.

Directly above this jagged lower line rests one chaotic pile of solid and yarn-textured marbles.

one shall spot solid violet, emerald, Light azure, emerald, rose, plus Dark Blue marbles spanning left to right.

Embedded higher onto over this grid sit this yarn-rough variants: one violet one over this west, one emerald one on this top middle, plus a yellow one on the right.

here sit four blue side Tunnels in total.

Two sit over this west edge, plus two sit on the right edge.

This number sends every time you clear a bottom Box .

the lower cases sit stacked deep plus dictate a very narrow opening route.

this absolute head line consists from exactly four cases : one Dark azure over this far west, followed via three Brown Boxes next to it.

this line directly past that front line shifts the required colors.

one shall spot two Dark azure cases , one Brown Box , and one Pink Box .

this third line rear shifts again, demanding one Dark azure Box and three Black Boxes .

This arrangement creates a massive bottleneck.

one absolutely should empty the Brown and Dark Blue Boxes first.

But this upper rack hides this bulk from this Dark azure spheres over this right side, directly behind the Black marbles.

amber plus Light azure spheres sit cleanly exposed on the middle of the tray.

Dropping them down first shall fill this Conveyor track , leaving one zero room into manage this chaotic flood that happens once this side Tunnels count down to zero.

Level 551 Level Overview

one hold into thread this needle between clearing this first bottleneck plus bracing with this extra marbles hidden in the side mechanisms.

Level 551 Cracking the Front Line Bottleneck

this Conveyor track needs into remain as empty as possible with the midgame transition.

choose this lower-left Brown marble in the Top Tray .

This sends it into the active front Brown Box .

Immediately choose this two dark spheres parked over the bottom right of the Top Tray .

one do not hold one head-line dark case yet, so those will sit on the Conveyor Belt .

Moving those dark spheres exposes this Dark azure spheres hidden behind them on the right side.

Channel those Dark azure marbles into the front-left bottom Box .

bring this remaining visible Brown spheres from this upper-west side from this upper rack into finish off this front line of Brown bottom Boxes .

As those first lower cases empty, this numbers over this side Tunnels shall send from 2 down into 1, and then to 0.

Level 551 Managing the Midgame Flood

Clearing that head line changes this entire landscape of the board.

this side Tunnels shall available and flood the board with new marbles.

As this side Tunnels hit 0, dark plus violet spheres will spill out directly toward the chute.

Look at your newly exposed bottom Boxes .

this second plus third rows slide forward, revealing dark, Purple, and textured Green Boxes .

Immediately sort this loose dark spheres that one previously parked on the Conveyor Belt .

Send them into this newly opened dark lower Boxes to free up desperately needed space.

Catch this newly spilled violet spheres plus route them into this active Purple bottom Box .

Resist this urge into bring this Light azure or amber spheres from the top center of the board.

Even though they look easy into take, their corresponding lower cases are still trapped in the back rows.

Level 551 Surviving the Final Clear

Once this dark plus violet bottleneck sits removed, the board finally opens up.

this rear rows from lower cases will slide into the active front position.

those demand Light azure, Pink, and textured Green marbles.

Now sits this time into unload the center of the Top Tray .

choose this Light azure plus amber marbles to clear out the middle columns.

Route this rough yarn spheres (rose, emerald, gold) into their matching cases as they slide forward.

Keep one close eye on your Conveyor Belt capacity.

If one bring one shade first, make sure its matching case sits zero more than one empty away, or one shall jam this belt right at the finish line.

Frequently asked questions

How do I beat Marble Sort Level 551?

Feed the colors that already have an open bottom Box first, keep your belt from filling up, and only release a new color when a matching Box is ready. Follow the move order in the solution above and you can clear Level 551 every time.

What is the main trap to avoid on Marble Sort Level 551?

The biggest mistake on Level 551 is tapping a color that has no active bottom Box yet — those marbles park on your Conveyor Belt and eat limited slots. Hold back any color that has no receiver waiting and the stage stays under control.

What colors do I need to match on Marble Sort Level 551?

Level 551 mainly revolves around Brown, Purple, Dark Blue. Focus on feeding Brown first when its Box is open, then introduce Purple as the lower lanes free up so you never choke the belt.

How should I open Marble Sort Level 551?

Begin by checking the lower part of the tray and only select colors that already sit in an open Box down below. Clearing those first few matching blocks unlocks the rest of the board without jamming your sorting space.

How many moves does Marble Sort Level 551 take to complete?

Level 551 is a color-sequenced stage that clears cleanly when you stick to the exact order above. The step-by-step solution walks each move so you can finish it with the fewest taps and no wasted belt slots.

Is there a video walkthrough for Marble Sort Level 551?

Yes. The embedded video on this page walks through Marble Sort Level 551 move by move, and the screenshots below show each stage of the layout so you can follow along and beat it.