Block Out Level 64 Walkthrough and Sorting Strategy

To complete Level 64 in Block Out, use empty tubes as temporary buffers to clear out top-layer blocks that cover mismatched base colors. Unlocking access to the bottom of each stack lets you combine matching colors into single tubes and systematically clear space.

Managing Tube Space and Buffer Slots

Success on Level 64 depends on maintaining open slots to prevent your board from locking up. Treat empty tubes as high-value assets rather than permanent storage.

• Consolidate matching colors immediately: If two tubes share the same top color, merge them into a single stack right away to free up an empty tube.
• Use empty tubes as short-term buffers: When relocating an single block to an empty tube, ensure that move enables a follow-up action that clears the tube within two steps.
• Protect your final open space: Keep your tube with the most open capacity available as a buffer until the final colors are sorted.

Recommended Sorting Sequence

Follow a structured move order to organize the board efficiently:

1. Clear top-layer blocks: Identify any top block that does not match the block directly beneath it and move it into an empty tube slot.
2. Expose base colors: Continue clearing mismatched upper blocks until the bottom colors of occupied tubes are fully accessible.
3. Consolidate primary stacks: Move matching exposed colors into the same tube to complete single-color sets.
4. Clean up remaining blocks: Use newly cleared tubes to sort any remaining orphaned blocks until every target set is organized.

Preventing Deadlocks with Reverse Planning

A deadlock occurs when all available tubes fill with mismatched colors, leaving no valid destination for a move. If your options become restricted, use reverse planning to break the bottleneck:

1. Identify the specific target color stuck at the bottom of a filled tube.
2. Trace upward to see which blocks are preventing access to that base color.
3. Prioritize clearing those upper blocking layers into open slots, even if it delays completing another color match.

Minimizing unnecessary moves relies on creating chain reactions—placing one block in a buffer to clear an entire color set, which immediately opens space to complete the next tube.