Which chamber opens first in Block Out Level 690?

The tall green upper-right chamber retracts first; its reveal must pass through the shared center before the lower rooms open.

What is the last piece in Level 690?

A purple bent piece turns through the lower-right pocket and exits through the bottom-right purple gate.

Block Out level guide

expert 8 colors

Level 690 surrounds one H-shaped transfer stem with four covered chambers and saves a purple bent block for the bottom-right exit.

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

Remove the exposed red top bar and nearby cyan/green edge pieces, then shift the central pink horizontal away from the junction.
Send the first yellow horizontal toward its side gate and clear the upper-left cyan blocks without filling either neck.
When the tall green cover retracts, take its outer red and yellow bends before lowering the larger green and cyan pieces.
Feed the reveal through the central stem one color at a time, sending each piece onward to a gate.
Reduce the lower-left wooden cover; after it opens, clear its green/yellow edge before pulling cyan and pink into the stem.
Send the lower-left cyan and pink pieces out before reducing the red lower-right cover to zero.
Move the red reveal's yellow L into the open center, then clear its cyan square group along the right wall.
Remove the remaining red, yellow, cyan, and pink pieces from the upper rooms so the H stem is empty.
Turn the final purple bent piece through the lower-right pocket and send it down through the purple gate for confetti.

Colors in this level:

Green, Red, Yellow, Cyan, Blue, Pink, Purple, Brown

Leaving the long central pink bar across a neck while another chamber is ready to open.
Sending the lower-right purple block out before the yellow L and cyan group have used its staging pocket.

Send long bars through the stem instead of storing them across a neck.
Clear yellow and cyan from the red lower-right reveal before turning the final purple block.

Board notes 5 details

Layout: Two upper and two lower rooms share a narrow H stem; a tall green cover, wooden lower-left cover, small pink center cover, and red lower-right cover surround cyan, red, yellow, green, pink, and purple pieces.
Goal: Open the upper-right chamber, feed both lower reveals through the same stem, and keep the bottom-right pocket free for the final purple bend.
Opening: Clear the red top bar and cyan/green edge pieces, shift the central pink horizontal away from the junction, and send the first yellow bar toward its gate.
Danger Zone: A long pink bar across either neck blocks multiple chambers; after the red reveal, moving purple first removes the staging cell needed by its yellow L and cyan group.
Mechanics: Four covers retract around a permanent H-shaped corridor, forcing every reveal to reuse the same center in a different direction.

Which chamber opens first in Block Out Level 690?
The tall green upper-right chamber retracts first; its reveal must pass through the shared center before the lower rooms open.
What is the last piece in Level 690?
A purple bent piece turns through the lower-right pocket and exits through the bottom-right purple gate.