How to Play Block Out! - Color Sort Puzzle: Complete Beginner Guide

Block Out! - Color Sort Puzzle looks like a matching game. It is really a routing game. Every block has to travel across a shared board to the one door that accepts its color, and every move changes the space available to every other block. The levels start generous and then tighten the lanes, add more colors and introduce moving obstacles. Players who tap quickly usually make the board worse. Players who read the board first make it look easy.

This guide explains the rules from the ground up, then gives you a repeatable way to choose the next move. If you are stuck on a specific board, the full level library covers every level number in the 1–843 run, with walkthrough pages for the 839 boards that have a published solve.

The goal: clear every colored block

Each level gives you a set of colored blocks and a set of doors in the same colors. A block disappears when it reaches the door that matches its color. The level is complete when no blocks remain.

The complication is that blocks do not have their own private track. They share the same board, the same open cells and often the same central lanes. A block that is harmless in one position can become a wall in another. That is why the order of moves matters more than the number of moves.

Blocks, lanes and doors

Before your first slide, identify three things:

• The doors. Note every color and where its door sits on the edge of the board. The door layout is the map for the whole level.
• The blocks. Count how many blocks each color has. A color with several blocks will take longer to clear, but it also gives you more chances to route one through an open lane.
• The shared space. Look at the middle of the board and the corners. The middle is usually the fastest route and the first place to jam. The edges are usually the best waiting space.

Do not think of a block as “belonging” to the nearest door. Think of it as traffic that has to reach a destination without blocking the traffic behind it.

How to move a block

Slide a block along an open lane toward its matching door. A move is legal only when the cells between the block and its destination are clear. If a lane is blocked, pushing harder does not help; you need to move the block that is blocking the mouth of the lane first.

Use short moves. A long slide across the board feels efficient, but it can park a block in front of a door another color still needs. Short moves keep more options open and make it easier to undo a mistake.

If the board jams completely, restart early. A fresh board is almost always faster than trying to untangle a position where no block has a route.

Read the board before you slide

The most useful habit in Block Out! is a ten-second pause before the first move. Ask four questions:

1. Which color has the fewest available routes?
2. Which block is currently blocking the most other blocks?
3. Which door is closest to being permanently sealed?
4. Where can I park a spare block without closing a lane?

The answers tell you what to move first. A block with only one route should usually move while that route still exists. A block sitting in the middle should usually move before the board fills around it. A door with blocks on both approaches needs attention before you open a second front.

The three-pass scan

A reliable way to plan a board is to scan it three times.

The scan is not a guarantee that the first move is perfect. It is a way to avoid the most common mistake: clearing a large group while a small block quietly loses its last route.

A simple clear order that works

When two or three plans look equally good, use this order:

• Clear the most constrained color first. The color with the fewest usable routes is the one most likely to become impossible.
• Clear the color with the most blocks before the board gets busy. More blocks means more trips through the shared lanes.
• Finish one color before opening a second front. Splitting attention between two colors is how the board becomes unreadable.
• Leave the shortest routes for last. A short final route stays usable even when the board is crowded.
• Never park a block in front of an unused door. Even one move in front of a door can turn a simple finish into a dead board.

If a color has only one block left, do not automatically save it for last. That last block may be the thing blocking another color. Clear it when its route is open, then use the freed space.

Space is the real resource

Most failed attempts do not run out of moves. They run out of usable space. A board with three open cells can still be solved if the cells connect the right lanes. A board with ten open cells can be lost if they are all on the wrong side of a wall of blocks.

Keep the center open for as long as possible. Use the edges as waiting space. When you need to park a block, choose a spot that does not sit directly in front of a door or at the mouth of a shared lane.

Elevators: wait for the lane to line up

Elevators move blocks or create a moving route between lanes. The mistake is treating an elevator like a normal open cell. Timing matters. If the platform is not level with your lane, the block cannot cross cleanly, and a forced move can leave the block stranded.

Watch one full elevator cycle before committing a block to it. Then send the block when the platform is aligned and the route on the other side is clear. If you miss the window, wait for the next cycle instead of forcing a slide.

Block generators: leave the drop column empty

Generators add new blocks to the board. They are designed to punish players who clear a column without thinking about what will fall into it. Before you clear the space beneath a generator, ask whether the new block will help you or block the lane you just opened.

The safest pattern is to keep the drop column clear until the generated block has somewhere useful to go. If the generator is about to fill the only route to a door, clear that color first. A generator is not random noise; it is a scheduled obstacle you can plan around.

Common mistakes that jam the board

• Moving the biggest block first because it looks satisfying. The biggest block may have the most routes, not the fewest. Check the constrained blocks first.
• Clearing the center before the edges. The center is the route most blocks need. Filling it with waiting blocks is the fastest way to lose.
• Opening two colors at once. Two half-cleared colors create twice as many blockers. Finish one front before starting another.
• Ignoring a door because it is far away. Distance is not the problem. A blocked approach is. Check every door approach, even the quiet ones.
• Forcing an elevator move. A mistimed elevator move can strand a block in a lane with no exit. Wait for the cycle.
• Restarting too late. If no block has a route, the board is already dead. Restart while you still remember the layout.

Difficulty curve and the nine level logs

The game's tier labels are a useful guide to what changes, even though every board still follows the same core rules.

This site breaks the full 1–839 run into nine field logs. Each log explains the problems to expect in that stretch and links every available level page:

• Levels 1–100
• Levels 101–200
• Levels 201–300
• Levels 301–400
• Levels 401–500
• Levels 501–600
• Levels 601–700
• Levels 701–800
• Levels 801–839

When to use a walkthrough

Use a walkthrough when the board has been stuck for more than a few minutes, when a door has no visible approach, or when an elevator or generator keeps undoing your progress. Watching a full clear is faster than guessing at the same jam ten times.

Most level pages on this site include a gameplay image, the difficulty rating and an embedded video. The video is the best way to see the timing of moving obstacles. The written strategy notes are the best way to understand why a move works.

Quick checklist

Before every move, check these five points:

• Is the block's route actually open?
• Does the move put the block in front of a door I still need?
• Does it close the center lane for another color?
• Is a generator about to drop a block into the space I am clearing?
• Is an elevator aligned with the lane I want to use?

If the answer to any of the last four is “yes” or “not sure”, stop and look at the board again. A slow move that keeps the board open is better than a fast move that seals a door.

Frequently asked questions

Is Block Out! hard to learn?

No. The basic rule takes one level to understand: slide a block into the matching door. The difficulty comes from doing that without blocking the routes other blocks need. The first hundred levels teach the idea gently; later levels assume you already know it.

Should I clear the biggest color first?

Not always. Clear the color whose routes are most likely to disappear first. A large color with several open lanes can wait. A small color with one narrow approach usually cannot.

What should I do when the board is full?

Count the open cells and trace the route for each remaining block. If no block has a complete route, restart. If one block has a route, clear that block and re-check the board before planning the next move.

Do I need to watch a video for every level?

No. Most boards can be solved by applying the same clear order. Use a video when the layout is hard to read from a still image, when a moving obstacle changes the timing, or when you have been stuck long enough that guessing is costing more time than watching.