Loop Sort level guide
Loop Sort Level 21 Walkthrough
Loop Sort Level 21 uses a square perimeter around three center trucks and three south sources. Start with the lower-center purple stream, let it clear the left turn, then route the exposed blue, green, and yellow groups before the late red clean-up.
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How to Solve Loop Sort Level 21 — Full Solution
- Tap the lower-center truck and release its purple cubes through the lower-center entry; let them travel left on the bottom rail and up the left side of the square.
- Keep the south-right red-over-orange stack closed until the purple stream has cleared the left turn.
- After the upper center faces are exposed, send blue on its own loop pass and then release the adjacent purple group to its matching open truck.
- Route green from the blue-red-green center truck only when its receiver is open, then put yellow through the right-side return rather than mixing it with red.
- Clear the revealed lower-center cargo and south stacks; finish with the remaining red group and wait for all six trucks to show checks.
Colors in this level:
Purple, Orange, Red, Blue, Yellow, Green
Common Mistakes to Avoid
- Releasing south-right red while purple is still using the lower-left corner.
- Treating an orange-covered center truck as if its later blue, green, or yellow strip were visible at the start.
Quick Tips for Loop Sort Level 21 (spoiler-free)
- Give purple the first lower-center exit and keep red out of that opening queue.
- Read the blue-purple-yellow and blue-red-green center faces only after their covers have changed.
- Use the last red release as the lower-rail clean-up.
Board notes 5 details
- Layout
- A square loop surrounds three horizontal center trucks. The upper two begin orange-covered and the lower one releases purple; beneath the loop, the south-left stack shows orange-purple-red-orange, the center is covered, and the south-right stack shows red over orange. Purple leaves through the lower-center entry, moves left across the bottom, and climbs the left rail.
- Goal
- Complete six truck groups, from 0/6 to checked purple silhouettes. After three checks, the upper center groups visibly read blue-purple-yellow and blue-red-green while the lowest center truck is still covered.
- Opening
- Tap the lower-center purple-facing truck first and give its purple cubes the lower-left pass before opening the south-right red-over-orange stack.
- Danger Zone
- Red from the south-right stack shares the lower rail with the first purple pass. Releasing it before purple clears the lower-left corner can put red ahead of the newly exposed center receiver sequence.
- Mechanics
- A compact square perimeter connects three stacked center groups to three south sources; checks expose new color strips and remove completed trucks from play.
Frequently Asked Questions
What is the first move in Loop Sort Level 21?
Release purple from the lower-center truck. It takes the lower-left path and clears the first route before red can crowd the same rail.
Why should red be late in Level 21?
The red-over-orange south-right stack enters the same lower rail used by the opening purple stream. Waiting preserves the center receivers' exposed order.