Loop Sort level guide
Loop Sort Level 421 Walkthrough
Loop Sort Level 421 folds one long route around two vertical receivers and hides expanded upper and lower source banks behind red covers. Separate the early orange, yellow, white, and purple waves before routing the late brown, gray, green, and pink reveals.
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How to Solve Loop Sort Level 421 — Full Solution
- Release exposed orange and let the wave pass the right turn beside the central receivers.
- Route yellow, white, and purple separately from the visible upper stacks.
- Clear lower red and black, then send green and light blue as matching space opens.
- After the upper cover retracts, route the revealed brown and gray before returning to orange and red.
- Re-read the opened lower bank and clear pink, green, light blue, yellow, and orange one wave at a time.
- Finish gray, clear the yellow/light-blue source, then release the final solid light-blue wave and confirm both receivers and every outer source check.
Colors in this level:
Brown, Gray, Pink, White, Yellow, Green, Red, Light blue, Black, Purple, Orange
Common Mistakes to Avoid
- Releasing a second color while orange still occupies the shared right turn.
- Guessing cargo beneath either red cover.
- Following the original bank layout after a cover has exposed new trucks.
Quick Tips for Loop Sort Level 421 (quick clues)
- Wait for orange to clear the right turn before adding another color.
- Re-read both source banks whenever a red cover retracts.
- Keep red and black separate around the lower bend.
Board notes 5 details
- Layout
- Two vertical receivers occupy the center of a rectangular loop, with covered source banks above and below the route.
- Goal
- Complete both central receivers and every outer truck revealed by the two red covers.
- Opening
- Let orange clear the shared right turn, then route visible yellow, white, and purple as separate waves.
- Danger Zone
- Traffic from both source banks converges at the right turn, and the red covers conceal several late stacks.
- Mechanics
- Two staged covers expand the visible board and reveal late brown, gray, light-blue, green, red, orange, and pink cargo.
Frequently Asked Questions
Which turn do the two source banks share?
The narrow right turn shared by traffic from the upper and lower source banks.
What do the red covers contain?
Their contents are hidden initially; the verified run reveals additional brown, gray, light-blue, green, red, orange, and pink stacks.