Block Out: How to Solve Level 845

To solve Level 845 in Block Out, your immediate goal is to empty one full column to create a dedicated sorting buffer, then consolidate exposed colors one complete stack at a time. Spreading mismatched blocks across available spaces quickly locks the board into an unrecoverable state.

Board Elements and Sorting Priority

Before making any transfers, assess the layout to identify which column can be emptied fastest and which colors are easiest to group.

Board Element	Role in Level 845	Handling Priority
Empty Column	Transit lane for routing pieces	Critical (keep at least one available)
Exposed Matching Tops	Readily accessible consolidation targets	High (merge to free underlying blocks)
Deeply Buried Segments	Colors trapped beneath dissimilar layers	Medium (uncover via planned merges)
Completed Stacks	Finished four-block monochromatic sets	Low (leave alone once assembled)

Opening Moves: Clearing Your First Buffer

Do not spread blocks across multiple columns during the opening phase. Instead, direct every transfer toward clearing out a single column.

Locate columns that contain matching exposed colors on their top layers.
Move stray top blocks onto matching segments that sit lower down in adjacent columns.
Focus removals entirely on one designated column until it is completely vacant.
Keep that newly emptied space open as a working buffer rather than filling it with an unorganized block.

Mid-Stage Consolidation Rules

Once a transit column is open, the middle phase requires strict move discipline to avoid running out of free slots.

Target one color at a time: Identify the color that has the highest number of exposed segments across the board. Move those pieces into a single target column until the four-block set is complete.
Preserve column capacity: Avoid moving a block into an empty space unless that move immediately enables a chain of follow-up merges.
Uncover the next working color: When transferring a top block, prioritize moves that expose a color you are actively assembling.

Breaking Late-Game Blocking Loops

The endgame often produces a circular lock where Color A covers Color B, Color B covers Color C, and Color C traps Color A.

To break this loop:

Transfer the blocking cap of Color A into your open buffer column.
Route the exposed pieces of Color B into their matching column to complete the set.
Consolidate Color C into the space vacated by Color B.
Return Color A from the buffer to finish its stack.

Always verify that your destination column has enough open capacity before initiating a transfer. If all top blocks are mismatched and no buffer column remains open, the board is deadlocked and requires a level restart.