What is the first phase?

Route orange and red through the upper return, then clear gray and yellow before opening more lower sources.

What confirms the boundary level is complete?

Every lower slot shows a check mark after all seven groups are placed.

Loop Sort level guide

hard 9 colors

Loop Sort Level 250 is a seven-group boundary board with two short horizontal inner rows and a six-slot lower source bank.

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Route the opening orange and red waves through the upper return and complete their matching slots.
Clear gray and yellow while keeping both upper rows free for the next side entry.
Resolve purple and the first green and blue layers from the lower bank as the upper slots check.
Release brown and pink one at a time, using the empty upper row as the next matching destination.
Finish the late yellow, blue, green, and purple fragments through the remaining lower slots.
Confirm that all seven groups and every lower slot show check marks.

Colors in this level:

Orange, Red, Gray, Yellow, Purple, Green, Blue, Brown, Pink

Treat every checked upper slot as a dependency before opening the next lower source.
Keep the brown and pink lower sources staged until the upper rows open.
Use the two side entries one at a time during long red and yellow waves.

Board notes 5 details

Layout: A compact vertical board has two short horizontal receiver rows in the upper loop and six upright source slots below. The outer path enters from both side rails, and the lower bank exposes orange, red, gray, yellow, pink, purple, brown, blue, and green layers.
Goal: Clear seven groups through the two upper rows and six lower sources; the verified final frame shows every lower slot checked.
Opening: Route the opening orange, red, and gray traffic around the upper return, then clear yellow and purple through the side rails.
Danger Zone: Both side entries feed the same two upper rows. Opening several lower sources before the current receiver checks can leave red, yellow, or pink without a free matching slot.
Mechanics: Two horizontal inner rows and a six-slot lower bank create a compact staged sequence and close the 201-250 range without a level 251 dependency.

What is the first phase?
Route orange and red through the upper return, then clear gray and yellow before opening more lower sources.
What confirms the boundary level is complete?
Every lower slot shows a check mark after all seven groups are placed.