Marble Sort Level 187 Walkthrough Solution | Marble Sort 187

Marble Sort Level 187 Guide: The Lock and Key Trap

Marble Sort Level 187 is entirely about discipline. You load in and immediately see a massive Lock and Key mechanism holding the entire top row of marbles hostage. You cannot touch those top blocks until you dig down the right side of the board to grab that key.

The color palette here is dense. You are dealing with a heavy mix of Orange, Light Blue, Light Green, Yellow, and White marbles right up front. The sides of the board are guarded by four Tunnels, two on the left and two on the right. Every single one is stamped with a "2", meaning they are hiding queued marbles that will complicate your midgame.

You need to break the lock. But rushing it will instantly jam your Conveyor Belt.

The punishing board pattern in Marble Sort Level 187

Look closely at the bottom Boxes. Your starting front line demands Orange, Light Blue, Light Green, and another Light Blue.

Now look at the Top Tray. The absolute front row gives you White, Yellow, Orange, Light Blue, and Light Green.

Do you see the trap?

White is sitting right there in the bottom-left corner of the active Top Tray. It looks so easy to grab. Do not touch it. If you look at your lower Boxes, the first White Box is buried three rows deep on the far left. If you send those front White marbles down to the Conveyor Belt early, they will sit there, hogging precious space while you desperately try to uncover the colors you actually need.

The right side of the board is your true priority. The key to the upper lock is sitting directly on a Yellow block on the right side of the central cluster. You have to carve a path to it.

Clearing the initial front line of the Top Tray is highly satisfying in Marble Sort Level 187 because it perfectly matches the bottom targets. Releasing the Orange, Light Blue, and Light Green front marbles will immediately clear out your front line of bottom Boxes.

Once that first layer clears, the board identity changes. You will instantly face three Yellow Boxes lined up in the second row. This is your golden window. You must use this Yellow demand to dig straight down into the middle and right side of the Top Tray to grab the key.

The Conveyor Belt pressure gets severe once the lock breaks. The moment that top row opens, you expose Dark Blue and Red marbles, while simultaneously triggering the side Tunnels to start pushing new blocks into play.

Marble Sort Level 187 Step-by-Step Walkthrough

Follow this exact release sequence. The Conveyor Belt has zero room for error on this board.

Beating the opening bait in Marble Sort Level 187

The opening moves dictate whether you survive the midgame. You must filter the front row perfectly.

1. Ignore the White marbles on the far left of the Top Tray. Treat them as invisible.
2. Tap the Orange marble sitting in the middle of the front row.
3. Tap the Light Blue marble right next to it.
4. Tap the Light Green marble on the far right of the front row.
5. These drops will perfectly fill the Orange, Light Blue, and Light Green bottom Boxes waiting in the front row.
6. The moment those clear, three Yellow bottom Boxes will slide forward.
7. Grab the Yellow marbles from the front-left of the Top Tray.
8. Keep pulling Yellow from the center mass. Your absolute goal here is to expose the Yellow block on the right side that holds the key.
9. Tap the keyed block to drop it into the remaining Yellow Box.

Surviving the tunnel pressure in Marble Sort Level 187

Hitting that key changes everything. The top row unlocks, dropping Light Blue, Dark Blue, Green, Orange, and Red into the active pool. The side Tunnels also become active threats.

1. Check your new bottom Boxes. You will see Purple starting to dominate the right side of the lower tray.
2. You do not have Purple in the easy center. You have to start pulling from the side Tunnels.
3. Carefully tap the right-side Tunnels to extract Purple marbles. Do not spam tap. The Tunnels hide multiple blocks, and over-pulling will flood the Conveyor Belt.
4. Now you can finally process that White bait from the very beginning. The White bottom Box on the left side should be exposed or just one clear away.
5. Drop the White marbles from the top left. This clears out a massive chunk of the left-side blockage.
6. Send down the Dark Blue marbles that just unlocked from the top row.
7. Keep your eyes on the remaining number "1" or "0" on the side Tunnels. Clear the left Tunnels to match up the remaining Light Green and Pink marbles.
8. Use the final open Conveyor Belt slots to hold the Red and Pink marbles while the last Light Blue Box slides into place.

Clear the remaining side blocks systematically. Never leave more than three unmatched marbles on the belt once the Tunnels open up, and Marble Sort 187 will be done.