Loop Sort level guide
Loop Sort Level 139 Walkthrough
Loop Sort Level 139 stacks two horizontal rails around four inner bays. Clear red, brown, light-blue, green, and pink in short waves, then use the rail checks to reveal the lower blue, white, orange, and yellow traffic.
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How to Solve Loop Sort Level 139 — Full Solution
- Release the visible red source and let it travel across the upper horizontal rail to the right-side stop, establishing the first clear wave.
- Route inner brown through the upper rail and left connector, then send inner light-blue on a separate pass without overlapping at the connector handoff.
- Add inner green and pink to the upper rail only after the left connector is clear and the previous colour has reached its right-side stop.
- Let each upper wave travel the full rail length and reach the right stop before switching to the lower rail through the left-side turn.
- Follow the checked panels to open the lower blue, white, and covered reserve layers, routing each through the lower rail one colour at a time.
- Finish the orange and yellow traffic through both rails and wait for all seven colour groups to show checks across the upper and lower sections.
Colors in this level:
Red, Purple, White, Brown, Light-blue, Green, Pink, Orange, Yellow
Common Mistakes to Avoid
- Filling both rails before an inner receiver has checked.
- Sending a second colour through the left connector while the first wave is still handing off.
Quick Tips for Loop Sort Level 139 (spoiler-free)
- Keep the upper rail clear after the first red wave.
- Send inner brown and light-blue as separate waves.
- Do not fill the lower rail until the inner receiver checks.
Board notes 5 details
- Layout
- Two rounded horizontal rails are joined by a left turn and end at short right-side stops. Four inner vertical bays sit between them, with three top sources and four checked or covered lower reserve panels.
- Goal
- Check seven colour groups across the upper rail, inner bays, and lower rail while covered panels reveal the late blue, white, orange, and yellow layers.
- Opening
- Start with the visible red source, then route inner brown and light-blue separately before adding green and pink.
- Danger Zone
- The left connector is the rail handoff and the right stops hold queues; filling both rails can hide the inner receiver for the next reveal.
- Mechanics
- Inner bays hand cargo from the upper rail to the lower rail, and the bottom row mixes checked panels with covered reserve trucks.
Frequently Asked Questions
What should I release first in Loop Sort Level 139?
Start with the visible red source, then route the inner brown and light-blue bays one at a time.
Why must the rails be solved in short waves?
The left connector is the only handoff and the right stops retain queues, so long overlaps hide the next inner receiver.