What opens first in Block Out Level 670?

The narrow 3-cover opens before the tall cyan 2-cover on the left.

What should stay clear throughout the level?

Keep the horizontal rail across the middle free for the left-cover wave and the late yellow pieces.

Block Out level guide

expert 9 colors

Level 670 opens a narrow 3-cover and tall cyan 2-cover around a striped-cap column, then ends with a yellow-heavy four-cell finale.

If the player asks you to sign in, open the video on YouTube instead.

Clear the framed pink and green bars near the bottom gate, then remove accessible lower red and green pieces.
Move the right cyan column and small purple blocks away from center so the long yellow pieces can turn.
Open the narrow 3-cover and hold the revealed cyan striped-cap column against the left side of the middle chamber.
Route right-side yellow, pink, cyan and green pieces through matching gates while preserving the horizontal rail.
Retract the tall cyan 2-cover and pull its upper-left red, orange, yellow and pink wave toward center one color at a time.
Move the revealed pink and purple bent pieces through the lower half before the large blue/green shapes use the rail.
Clear blue and green pieces from both towers, leaving the gold-marked cells and yellow groups accessible.
Remove the green cross and lime L, then route the surrounding yellow T, L and rectangular pieces to top/bottom gates.
Send the final isolated yellow rectangles through their matching gates to empty the board.

Colors in this level:

Cyan, Blue, Yellow, Green, Lime, Pink, Purple, Red, Orange

Parking a long yellow piece on the center rail before the tall left cover opens.
Trying to clear the final yellow cluster while the green cross still occupies its turning area.

Board notes 5 details

Layout: A cyan 2-cover fills the left tower, a narrow purple/orange 3-cover stands beside it, and the right U holds yellow, cyan, purple, green, pink and blue pieces around four gold-outlined cells.
Goal: Open the narrow cover, route around the cyan striped-cap column, then clear the left tower and yellow finale across one shared center rail.
Opening: Remove the framed pink/green bottom bars, clear lower red/green pieces and move the right cyan column plus small purple blocks away from center.
Danger Zone: A yellow T, pink vertical or blue L across the horizontal rail traps the left-cover wave; the late green cross must also leave before the final yellow groups.
Mechanics: Two covers marked 3 and 2 open around a persistent cyan column, a gold-railed middle chamber and four gold-outlined cells.

What opens first in Block Out Level 670?
The narrow 3-cover opens before the tall cyan 2-cover on the left.
What should stay clear throughout the level?
Keep the horizontal rail across the middle free for the left-cover wave and the late yellow pieces.