Marble Sort Level 313 Walkthrough Solution | Marble Sort 313

Marble Sort Level 313 Guide: The Lock and Key Arrow Trap

Marble Sort Level 313 is an absolute trap if you start tapping blindly. You are looking at a heavily restricted board dominated by Green, Light Blue, Pink, and Purple marbles. The layout forces you into a very tight opening sequence. If you pick the wrong side of the board to clear first, you will jam your lower tray almost immediately.

Look at the starting grid. You have seven distinct columns in the Top Tray. The outer edges—columns one, two, six, and seven—are stacked heavily with downward-pointing Arrow Box tiles. These tiles refuse to budge until the block directly below them drops. You are forced into a strict bottom-up path on the flanks.

Dead center sits a massive iron padlock. This Lock and Key obstacle chains columns three, four, and five completely shut. You cannot touch the Purple, Green, Blue, or Brown tiles hiding behind that lock. The golden key is stranded way up in the top-left corner. It rests on a pink square, buried under a stack of Green, White, and Purple Arrow Box obstacles. This single key dictates your entire opening strategy.

Your starting bottom Boxes dictate the first possible moves. You have four active slots in the front row: Purple, Light Blue, White, and another Light Blue. Behind them, waiting in the queue, are more Light Blue, Green, and Black Boxes. You have to match these exactly while carving a path to that top-left corner.

The Lock and Key Choke Point in Marble Sort Level 313

Understanding the board layout is the only way to beat Marble Sort 313. The center is dead space until the lock breaks. This leaves you with only the left and right flanks.

The left flank holds your win condition. Column one starts with a Green base, topped by a White Arrow Box, a Purple Arrow Box, a Pink tile, and finally the golden key. Column two supports it with Pink, Green, Brown, and White tiles. You must excavate this side.

The right flank is pure bait. Columns six and seven are loaded with Black and Light Blue bases, topped with Green, Brown, Pink, and Red Arrow Box tiles. If you start clicking the right side indiscriminately just because the colors match a future box, the Conveyor Belt will fill up. The game wants you to pull down those right-side tiles, clog your belt space, and fail before you ever reach the key on the left.

The bottom Boxes shift the exact moment you clear the front row. The moment the initial Purple and Light Blue Boxes fill and disappear, a new set of demands pushes forward. You have to keep the Conveyor Belt lean so you have room to hold off-color marbles while digging through the left-side Arrow Box column.

Marble Sort Level 313 Step-by-Step Walkthrough

You need a surgical approach to the opening. Leave the right side completely alone until the center of the board is unlocked.

Digging for the Key in Marble Sort Level 313

Your only objective right now is breaking that center chain. Everything else is a distraction.

1. Check your front bottom Boxes. You need Purple, Light Blue, and White.
2. Tap the bottom Purple tile in column four and the bottom Light Blue tile in column five. Even though these are right below the lock, their bottom-most tiles are free to drop.
3. Pull the Light Blue from the bottom of column seven. This clears your first Light Blue Box.
4. Shift your entire focus to the far-left columns. Pull the bottom Green tile from column one and the Pink tile from column two.
5. As the Green and Pink bottom Boxes slide into place, feed them the newly unlocked White and Green Arrow Box tiles from the left flank.
6. Keep pushing strictly up columns one and two. Do not touch the Black or Light Blue Arrow Box columns on the right.
7. Tap the final pink tile in the top-left corner to grab the key. The massive chain in the center will shatter.

Surviving the Midgame Jam in Marble Sort Level 313

Once the chain drops, the board changes completely. The center block is now fully exposed, revealing a tall stack of Green, Blue, Black, and Brown tiles. This is where most players fail.

1. Assess your new bottom Boxes. You will likely be staring at Green, Black, Purple, and Brown targets pushing to the front row.
2. Pull from the newly opened center columns first. The center stack is dangerously high. Drain the Purple and Green tiles from the middle.
3. Watch your Conveyor Belt closely. The midgame is ruthless. If you pull down the remaining Pink or White Arrow Box tiles from the right flank without an active Pink or White Box at the bottom, your belt will clog instantly.
4. Hold back any off-color tiles. A pileup of mismatched pinks and whites on the belt will end your run right here.
5. Only tap the right-side Arrow Box tiles when you specifically need a Black or Light Blue tile to finish an active lower Box.

The Final Cleanup in Marble Sort Level 313

With the left side empty and the center draining, the board finally opens up.

1. Focus on clearing the remaining Black and Brown Boxes.
2. Drop the last few Arrow Box tiles from columns six and seven. Because the center is clear, you will have plenty of room on the Conveyor Belt to hold any stubborn colors.
3. Match the final Light Blue and Green marbles to clear the remaining bottom Boxes and finish the level.