BLOCK OUT GUIDES

full guide

Level 21

Block Out Level 21 is a triple-boss ladder. Break the framed `9` panel first, unwind the colorful middle strip second, and only then start shrinking the lower `16` and `18` panels.

hard

ios / android · current iOS and Android catalog checked 2026-08-03

Blue Yellow Green Red Pink Purple

Confirm these board landmarks

Block Out Level 21 is a triple-boss ladder. Break the framed `9` panel first, unwind the colorful middle strip second, and only then start shrinking the lower `16` and `18` panels.

  • Block Out Level 21 is a triple-boss ladder.
  • Break the framed `9` panel first, unwind the colorful middle strip second, and only then start shrinking the lower `16` and `18` panels.
  • The board mixes Blue, Yellow, Green and more.
  • The opening layout is a color-sort grid.
  • Clear matched tiles to finish the level.
Compare with the documented source board

My board is different Compare with source

Video walkthrough

Quick tips

  1. Solve the framed `9` first.
  2. The lower `16` and `18` values are phase two and phase three.
  3. Think in chain clears. The best move is the one that sets up the next two moves, not just the quickest current match.

Step-by-step solution

Step-by-step solution

  1. 1

    Move 1

    Work the top counters and clear the upper color band so the framed `9` panel is exposed.

  2. 2

    Move 2

    Drop the `9` panel before touching the lower bosses.

  3. 3

    Move 3

    Use the freed middle corridor to rotate the pink, green, and blue bars.

  4. 4

    Move 4

    Start shrinking the lower `16` panel once the center is no longer packed.

  5. 5

    Move 5

    Let the `18` panel begin falling only after the `16` frame has already opened.

  6. 6

    Move 6

    Save the floor green exit for the late cleanup when the lower panels are thin.

  7. 7

    Move 7

    Finish with the remaining tall color bars after both bottom bosses have collapsed.

Common failure points

Trying to shrink the lower framed values while the top `9` is still alive.

Leaving the middle strip packed after the top boss has opened.

Sources

Sources

Verification status: source verified. Solutions are matched to the source board before publication.

FAQ

Why might my Level 21 board look different?

Game version, platform or staged rollout differences can change a board layout.

Should I use a booster?

This Variant records booster use as unknown. Match the board before treating that note as applicable.