Marble Sort Level 712 Walkthrough Solution | Marble Sort 712

Marble Sort Level 712 Guide: The Giant Question Mark Blockade and Lock Trap

Look at this board. It is a trap from the first second. Marble Sort Level 712 hits you with a massive question mark wall right in the middle of the Top Tray. You have four keys trapped at the very top, and a row of active Boxes at the bottom demanding colors that are nowhere to be found.

This level demands perfect sequencing. One reckless tap into the hidden grey section, and your Conveyor Belt will permanently jam. The puzzle here is not just matching colors. It is figuring out how to dig through a blind wall without suffocating your board.

The Question Mark Wall pattern in Marble Sort Level 712

Every piece of this board is designed to bottleneck your progress. You need to understand exactly where everything is before you make a single move.

The Top Tray is divided into brutal layers. At the very top, you have four distinct vertical channels. From left to right, these hold a Blue, Purple, Orange, and Green Lock and Key marble. Directly beneath each key are two glass marbles of the matching color. You cannot touch any of these early on.

Beneath the glass marbles sits the defining obstacle of Marble Sort Level 712: a massive 14-block grey barrier covered in question marks. This hidden zone acts like a giant Surprise Bag. You have no idea what colors are inside, but you are forced to dig into it.

Below the grey barrier sits a row of flat colored panels—Pink, White, and Yellow. Finally, at the very bottom of the Top Tray, you have a 3x3 block of playable marbles: Red, Light Green, and Orange.

Now look at your starting bottom Boxes. From left to right, the active front line asks for Red, Orange, White, and White.

This is the brilliant, agonizing trap of Marble Sort Level 712. You have exposed Red and Orange marbles to clear the left side. But you have two active White Boxes on the right, and zero visible white marbles to fill them. The white marbles are buried inside that grey question mark wall. The right side of your Conveyor Belt is basically dead weight until you fish those missing colors out of the blind zone.

Further down in the bottom Boxes, locks are waiting. If those locked Boxes slide to the front before you release the corresponding keys from the top, the level is over.

Marble Sort Level 712 Step-by-Step Walkthrough

You have to play the opening perfectly. Space is your most valuable resource. Do not panic-tap the hidden barrier.

Surviving the blind opening in Marble Sort Level 712

Your first taps must clear out the visible freebies to make room for the blind pulls.

1. Clear the Red Box. Tap the exposed red marbles at the bottom left of the Top Tray and send them to the front-left Red Box.
2. Clear the Orange Box. Do the exact same thing for the front-left Orange Box using the visible orange marbles on the bottom right.
3. Start fishing for White. You now have breathing room on the Conveyor Belt. You must carefully tap into the grey question mark barrier to find white marbles for the two active White Boxes on the right.
4. Tap slowly. Do not spam the grey blocks. Tap one at a time. If it is a junk color you do not need right now, let it sit on the Conveyor Belt. The moment you reveal a white marble, feed it to the White Boxes.
5. Clear the White Boxes. Once both White Boxes are out of the way, the bottom board shifts, revealing a new row of demands.

Breaking the lock trap midgame in Marble Sort Level 712

Clearing the initial front line rips the grey barrier apart. The midgame opens up, and it is incredibly messy.

The hidden layer reveals a jumble of Yellow boxes, a Mystery Box on the left side, Light Blue boxes, and Purple boxes. More importantly, you finally have a clear path to the four key columns at the top.

1. Watch the Conveyor Belt flood. The moment the barrier breaks, you will likely get flooded with Light Blue and Pink marbles. Look at your new front-line Boxes. Prioritize clearing any Light Blue or Pink Boxes immediately to keep your belt from overflowing.
2. Hunt the Keys. Your bottom Boxes are now exposing purple and blue locks. You must shift your focus to the top four columns.
3. Dig out the Orange and Green columns. Break the glass marbles under the Orange and Green keys on the right side. Send those keys down as soon as their matching bottom Boxes appear.
4. Manage the Mystery Box. On the left side of the newly revealed layer, there is a Mystery Box. Do not touch the marbles blocking it until you have at least three empty slots on your Conveyor Belt. You need space to absorb whatever random color it demands.

Clearing the final locks in Marble Sort Level 712

The late game is entirely about managing the left side of the Top Tray.

1. Drop the Purple Key. Clear the purple glass marbles in the second column. Funnel the Purple key into the locked purple Box sitting in the middle-left of the bottom rows.
2. Drop the Blue Key. Break the blue glass marbles in the far-left column. Send the Blue key down to unlock the final bottom Box.
3. Clean up the stragglers. Once all four keys have hit their locks, the board is defused. Mop up the remaining Yellow and Light Green Boxes to finish the stage. Keep your taps methodical and never let the Conveyor Belt fill past the final slot.