Marble Sort Level 420 — Walkthrough and Solution

Marble Sort Level 420 is a fortress-style puzzle with a giant wooden Crate dead center, blocking the upper half and hiding four clusters. The entire top is draped in Surprise Bags, and the flanks are guarded by Connected Boxes and numbered Tunnels. Your Conveyor Belt is tiny, so the opening demands are brutal: you must feed the front-row bottom Boxes before anything else.

The bottom row starts with three Red Boxes on the left, a Magenta Box next to them, then empty space, and on the far right a Dark Blue Box and a Light Blue Box. Behind those, the second row waits with more demands. The Top Tray's front line shows Light Blue, Red, Dark Blue, and Dark Blue from left to right, but those Blues are decoys. The left edge has a Connected Box linking Dark Blue to Magenta, and the right edge links Yellow to Light Pink. Below these, four Tunnels are marked with 4s and 3s, ready to spit out hidden clusters once cleared.

Marble Sort Level 420 Walkthrough

Your first mission is to wipe out the three Red Boxes on the left and the single Magenta Box beside them. Do not touch the front Blues or the right-side Yellow/Light Pink Connected Box—they will jam your belt. The only safe way to start is by pulling the left Connected Box, which drops both Dark Blue and Magenta together.

The trap here is that the front row looks inviting, but the bottom Boxes don't match those colors. The Magenta from the left link will fill the Magenta Box instantly, while the Dark Blue sits on your belt, ready for later. The Red clusters are hidden behind the front Blues, so you must dig carefully to expose them without pulling the Blues.

How to Beat Marble Sort Level 420 — Step-by-Step

Phase one: Clear the Red and Magenta front

1. Tap the Connected Box on the left edge of the Top Tray, releasing Dark Blue and Magenta together. The Magenta drops straight into the Magenta bottom Box, clearing it, while the Dark Blue parks on your belt.
2. Next, locate the Red cluster in the front row of the Top Tray—there's one sitting right after the Light Blue. Tap it to start filling the first Red Box.
3. Now, shift your focus to the right side of the Top Tray. Find the Red cluster that's accessible behind the Light Blue, and tap it—this delivers Red to the second Red Box.
4. Finally, grab the other Red cluster on the far right side of the Top Tray, which is reachable without touching the Yellow/Light Pink Connected Box. This completes the third Red Box, clearing the entire front row of bottom Boxes.

Phase two: Shatter the Crate

1. With the front row gone, the second row of bottom Boxes slides forward, now demanding Dark Blue and Light Blue. That Dark Blue you've been holding on your belt will auto-fill the Dark Blue Box—let it go.
2. Now tap the front Light Blue cluster you ignored at the start. It drops into the Light Blue Box, clearing it.
3. Next, tap the front Dark Blue cluster, which also was a decoy earlier. This will fill the Dark Blue Box and clear the second row.
4. You're now at the clusters touching the central Crate. Look for any playable color adjacent to the wood—likely Red or Magenta—and tap it. This is the third adjacent cluster needed to break the Crate.
5. After the Crate explodes, four hidden clusters are revealed in the center, typically containing Red, Green, White, and another key color. Do not tap them yet.

Phase three: Manage the Surprise Bags and finish

1. Start tapping the central Surprise Bags one at a time. Each bag reveals a color that drops to your belt—check if it matches an active bottom Box. If it does, guide it to its Box immediately.
2. If a bag drops an unwanted color, you must have empty belt space to hold it temporarily. Never tap a Surprise Bag when your belt has only one or two free slots, because a dead pull could clog you.
3. Only pull the right-side Connected Box (Yellow and Light Pink) when you see a Yellow or Light Pink bottom Box in the front position. This prevents belt jams.
4. Finally, drain the side Tunnels. They each hold three to four clusters. Since the Crate is gone, you have ample belt space, so tap them repeatedly, matching colors to bottom Boxes as they appear, until the board is clean.

Tips & tricks

• Always keep at least two empty slots on your Conveyor Belt before pulling a Surprise Bag.
• If you accidentally pull a Blue early, you can still recover by using it to fill a later Blue Box, but it will slow you down.
• Memorize the order of bottom Box demands: Red, Red, Red, Magenta first, then Dark Blue, Light Blue, and so on.

Common mistakes

• Tapping the front Blues at the start, which clogs your belt with useless colors.
• Pulling the right-side Connected Box too early, dumping Yellow and Light Pink when no Boxes need them.
• Ignoring belt management and tapping Surprise Bags blindly, leading to a full belt and a dead run.

Marble Sort Level 420 FAQ

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