Block Out Level 137 Strategy: How to Clear the Board

To solve Level 137 in Block Out, immediately clear one full column to serve as an open sorting buffer, then consolidate exposed colors onto matching base foundations. Avoid spreading split colors across multiple partial stacks, and do not store unrelated tiles in your open buffer column unless you have an immediate sequence to unload them.

Opening Strategy: Freeing a Buffer Column

The layout of Level 137 buries matching pieces under alternating color layers. Without an empty slot, moving any piece restricts board mobility and risks an early deadlock.

Identify the shallowest column: Scan the board for the column that requires the fewest transfers to empty out completely.
Shift top blocks to matching targets: Transfer exposed top blocks onto matching colors in adjacent columns.
Avoid non-matching drops: Do not move a tile onto an unmatched column unless that move immediately frees the final piece needed to clear your target buffer slot.
Preserve the empty slot: Once a column is completely clear, keep it open as a temporary transit point rather than filling it with mixed blocks.

Mid-Game Sorting and Deadlock Prevention

Once a buffer column is open, shift your focus to consolidating colors that have pieces exposed across multiple stacks.

Obstacle	Mechanical Impact	Tactical Response
Fragmented top layers	Blocks access to lower matching pieces	Merge matching surface tiles into the column with the deeper foundation of that color.
Limited holding space	Increases risk of board lockups	Use the empty column strictly for single-step transfers, returning pieces immediately.
Trapped reciprocal stacks	Mutual block (Color A over B in one stack, B over A in another)	Place Color A in the buffer, merge all Color B blocks into the second stack, then drop Color A on top.

When moving pieces during this phase, maintain two operational rules:

Prevent checkerboarding: Do not stack alternating colors within the same column unless you have already mapped the exact sequence to remove them on subsequent turns.
Protect base tiles: Check the bottom color of each column before placing an unmatched block above it. Adding unrelated blocks on top of a single base piece traps that color until the entire upper stack can be dismantled again.

Endgame Sequence: Closing Stacks

As the board narrows to the final two or three colors, shift your priority from opening space to finishing columns.

Lock the nearest completed color: Target the color that requires the fewest remaining tiles to complete. Drop the final matching pieces to finish and remove that column from play.
Cycle remaining fragments through the buffer: Use the open transit slot to isolate stray blocks from the final active colors.
Collapse remaining stacks: Group the remaining unified sets into their designated columns to finish the stage.