Marble Sort Level 517 Walkthrough Solution | Marble Sort 517

Marble Sort Level 517 Guide: The Mystery Box Wall and Twin Locks

This board is incredibly deceptive. You load into Marble Sort Level 517 and see a front line of easily accessible, brightly colored boxes. It looks like a simple matching game at first glance. It is not. The real nightmare lies just behind that front row: a massive, solid wall of grey Mystery Boxes heavily guarded by a twin Lock and Key setup.

Your dominant playable colors at the start are blues, greens, and reds. The bottom section demands an Orange, a Red, a Blue, and a Green to get moving. That is where the trap snaps shut. The top board does not have an exposed Orange box. If you blindly dump the visible colors onto your Conveyor Belt hoping to dig for an Orange, you will jam your belt and fail within the first ten moves.

The Dual Lock Pattern in Marble Sort Level 517

Let's break down exactly what you are looking at right now.

The Top Tray features a rainbow front line ready to drop: Light Blue, Blue, Red, Green, Yellow, Light Blue, and Purple. Sitting directly behind this row are three horizontal rows of Mystery Boxes. You have no idea what colors they hold until you drop the boxes in front of them.

Two yellow horizontal bars lock the upper half of the board. This is your Lock and Key mechanic. The left lock is tied to a green ring. The right lock is tied to an orange ring. You must clear a Green box and an Orange box to shatter these bars and access the top rows.

Flanking the sides of the board are two blue and red Gift Boxes stamped with a '3'. These will tick down and explode to reveal new boxes as you clear the items sitting next to them.

The bottom Boxes dictate your entire opening strategy. The front row asks for Orange on the far left, Red in the middle-left, Blue in the middle-right, and Green on the far right.

This creates immediate board pressure. You have Red, Blue, and Green sitting right there in the front of your Top Tray. You do not have Orange. The Light Blue, Yellow, and Purple boxes sitting in the front row are absolute bait. Touch them too early, and they will rot on your Conveyor Belt while you blindly tap Mystery Boxes trying to find that one required Orange box.

Marble Sort Level 517 Step-by-Step Walkthrough

You need surgical precision to survive the opening moves. Do not rush. Follow this release order to control your belt space.

Surviving the Opening Row in Marble Sort Level 517

The first few taps determine if you win or lose. We must handle the exposed matches first while actively ignoring the bait colors.

1. Clear the easy targets: Drop the Blue, Red, and Green boxes directly from the front row of the Top Tray into their matching bottom Boxes.
2. Break the first lock: Clearing that front Green box is crucial. It automatically triggers the green Lock and Key on the left side of the board. The left yellow bar will vanish, slightly opening up the top left corner.
3. Ignore the bait: Leave the Yellow, Purple, and right-side Light Blue boxes exactly where they are. Do not send them to the Conveyor Belt.
4. Make a calculated sacrifice: You still need an Orange box for the bottom left. Drop the left-most Light Blue box onto your Conveyor Belt. This exposes the first Mystery Box on the left side.
5. Fish for Orange: Tap the newly exposed Mystery Box. If it is Orange, drop it immediately to clear the bottom-left slot. If it is another color, let it sit on the Conveyor Belt and carefully tap the next Mystery Box behind it. You have enough belt space to absorb a few wrong pulls, but only because you ignored the Yellow and Purple bait earlier.

Triggering the Gift Boxes in Marble Sort Level 517

Once that first bottom row (Orange, Red, Blue, Green) finally clears, the board identity shifts completely.

6. Assess the new bottom row: The bottom section will shift up, revealing a heavy need for Light Blue and regular Blue Boxes, followed by Yellow and Pink further down.
7. Pop the timers: Because you cleared the left and right edges during your initial Mystery Box digging, the Gift Boxes on the sides will hit zero. They will burst open and dump a cluster of new playable boxes onto the board.
8. Hunt the Orange Key: The right side of the board is still blocked by the orange Lock and Key. Scan the newly revealed boxes from the Gift Boxes or dig slightly into the right-side Mystery Boxes to find an Orange box. Clear it the moment the bottom Boxes allow it. This shatters the right-side yellow bar.
9. Flush the Conveyor Belt: You likely have a Light Blue box (and maybe a random color from the mystery pulls) sitting on your belt. Now that the bottom row demands Light Blue, flush it off your belt immediately. Never leave a matching color sitting on the belt if a bottom Box is hungry for it.

Clearing the Back Row Stragglers in Marble Sort Level 517

With both locks broken and the Mystery Boxes mostly cleared out, the top back row is completely exposed.

10. Pace the back row: You can clearly see White, Orange, Brown, Pink, and Yellow sitting at the very top. Do not drop these indiscriminately.
11. Follow the bottom cycle: Only drop the Pink and Yellow boxes when the lower Boxes explicitly ask for them. The bottom stacks run deep with Orange and Green near the very end. Let the top-row White and Brown boxes rest in the Top Tray until their specific slots appear at the bottom. Keep your belt strictly for temporary storage, and you will secure the win.