Marble Sort Level 781 Walkthrough Solution | Marble Sort 781

Marble Sort Level 781 Guide: The Numbered Column Trap

Stuck on Marble Sort Level 781? Yeah, this one looks simple but it's a total logic trap. The board is dominated by those central, multi-marble columns, and if you tap them in the wrong order, you'll jam the Conveyor Belt instantly. This level is all about controlling the flow from those special stacks.

The Top Tray is shaped like a capital "I". At the very top, you have single-use marbles: yellow, purple, light blue, red, and orange. Below them, the real puzzle begins: three vertical columns marked with numbers 1, 2, and 2. Just below that, another two columns marked 2 and 1. These release multiple marbles at once. The bottom Boxes are a mix of light pink, purple, red, yellow, and blue, creating a high-traffic sorting problem from the very first tap.

The Central Stack Puzzle in Marble Sort Level 781

The entire solution to Marble Sort 781 revolves around the release order of the central numbered columns. Mess this up, and you’re done.

Here’s the layout you're facing. The lower central stack has a 2 light pink column in front of a 1 red column. This is the key. You physically cannot access that red marble until you have released the two light pinks. This forces your opening move. Releasing two pinks with nowhere to go will clog the machine, so your first priority is to create a destination for them.

The upper central stack has a 1 red, a 2 dark blue, and a 2 light pink. The 2 dark blue is a major chokepoint. There are only two dark blue marbles available for the entire level, and they are both in that one stack. Releasing them too early is a fatal mistake. You have to wait until you have two open dark blue Boxes ready to receive them.

The "bait" move here is trying to clear the reds first. It looks tempting because you have a few single red marbles available, but the most important red is trapped behind those first two light pinks. Don't fall for it. You must solve the pink problem first.

Marble Sort Level 781 Step-by-Step Walkthrough

Follow this exact sequence to manage the Conveyor Belt and clear the board without jamming. Do not deviate from the order of the central column releases.

Unlocking the Lower Stack in Marble Sort Level 781

Your first goal is to clear a path to the 1 red column that's stuck in the lower central stack. This requires a precise opening.

1. Target the leftmost column. The top Box needs three light pink marbles.
2. Tap the leftmost light pink pop-it square, located just above the Conveyor Belt. One marble will drop.
3. Now, tap the 2 light pink column in the lower central stack. This will release two more pink marbles.
4. You now have three light pink marbles on the Conveyor Belt. Guide all of them into the leftmost Box. It will clear.
5. Success. You’ve cleared your first Box and, more importantly, you have now unlocked access to the 1 red column that was trapped behind the pinks.

Clearing the Path with Reds and Pinks in Marble Sort Level 781

With the lower stack unlocked, we can start making progress on the rest of the board. The goal is to clear Boxes one by one without flooding the belt.

1. Focus on Column 3. The top Box is red and needs three marbles.
2. Tap the single red square from the top-left of the Top Tray.
3. Tap the red pop-it square above the Conveyor Belt.
4. Finally, tap the newly accessible 1 red column in the lower central stack.
5. Send these three red marbles into the third Box from the left. It will clear, revealing another red Box beneath it.
6. Switch to the far right. Now we'll clear the top Box in column 4, which needs three light pinks.
7. Tap the remaining light pink pop-it square.
8. Tap the 2 light pink column from the upper central stack.
9. Direct these three pinks into the far-right Box to clear it.

Solving the Dark Blue Problem in Marble Sort Level 781

The mid-game is about clearing the remaining single-color Boxes to reveal the final layers. Use your single yellow, purple, and orange marbles from the top to clear their matching Boxes. As you work your way down, you'll eventually expose the dark blue Boxes. This is the final puzzle.

1. Continue clearing Boxes using the single marbles and the remaining red column. The key is to clear columns 3 and 4 until the dark blue Boxes at the bottom are visible.
2. Do not touch the 2 dark blue column until both dark blue Boxes are the top active Box in their respective columns.
3. Once both dark blue Boxes are ready, tap the 2 dark blue column in the upper central stack.
4. Send one dark blue marble to the Box in column 3 and the other to the Box in column 4. Clearing these opens up the final stage.
5. After the dark blues are gone, all that's left is to use the remaining marbles, including the light blues and any leftovers from the central stacks, to clear the final Boxes. The pressure is off, and you can sort the remaining colors to finish Marble Sort Level 781.