Is BLOCK/08 free to play?

Yes. BLOCK/08 is a free browser game. There is nothing to install and no account to create. Open the page and play.

Do I need an account to save my progress?

No. Your level progress, stars, streak and achievements are saved automatically in your browser's local storage on your device.

What are bolted lights?

Bolted lights first appear at Classic level 13. They are already filled and cannot be covered, so every movable block must build around them. Two bolted lights first appear at level 37.

What is a fixed block?

From Classic level 25, some puzzles begin with one whole colored block already placed. It counts toward the completed map and cannot be selected, moved, cleared or covered.

How do I keep my daily streak?

Complete the Daily puzzle once per day. Clearing it on consecutive days grows your streak; missing a day resets it to zero.

Can I replay a level I already cleared?

Yes. Open the level map, browse to any chapter you have reached, and tap a lit bulb to replay that level, for example to improve its stars, active-time best or optional Mastery mark.

How to Play BLOCK/08

BLOCK/08 is a polyomino puzzle: a glowing map appears on an electronic light board, and your job is to complete it exactly with the movable blocks in your tray. Blocks can be rotated and flipped, nothing may overlap, and nothing may spill outside the lights. Some puzzles also begin with bolted lights or a whole colored block that is already fixed as solved work. When every required cell is filled, the board clears. This page covers the rules, all four game modes, the three Hint tiers, optional Mastery and the real first-48 learning curve.

The basics

Read the map. Uncovered lights show the space your tray blocks must fill. A bolted light is already filled and blocks every piece; a colored fixed block is already part of the solution.
Pick a block from the tray on the right (or the bottom bar on phones).
Turn it. Press R to rotate 90°, F to flip. On touch screens use the Rotate and Flip buttons.
Place it. Drag the block onto the board; a live preview shows green for a legal spot and red for an illegal one. You can also select a block and simply tap its landing cell.
Recover without losing progress. Placed a block badly? Drag it elsewhere, press Z to undo, use “Take back”, or clear the whole board. Any valid clear still unlocks the next level; these recovery actions only matter for the optional Mastery mark.

The four modes

Daily: one puzzle per day, identical for every player in the world. Clear it to grow your 🔥 streak. It cannot be rerolled, so bring your best.
Classic: the main journey. The curated first 48 levels use four six-level learning beats per chapter, alternating new ideas, practice, local peaks and recovery instead of rising every level.
Rush: 90 seconds on the clock. Clear as many boards as you can; faster clears earn bigger bonuses, and your best score is saved.
Learn: six guided lessons covering placement, rotation, flip, a bolted light, a whole fixed block and narrow-entrance topology.

Stars, streaks and achievements

Every Classic and Daily clear is rated out of three stars. A clear within its par time earns three stars; a slower clear earns two. Observe keeps that time-based result but removes the speed bonus and optional Mastery. Orient caps the clear at two stars; Place and Assisted layouts cap it at one. Completion itself always advances Classic progress and is the only requirement for a Daily streak. Stars are saved per versioned puzzle, and the map lets you replay any lit bulb.

On canonical Classic levels 1–48, ◆ marks optional Mastery: finish without Hint or Clear, use no more than one Undo, and stay within that puzzle's reference number of rotations and flips. The game also records your best active solve time. Mastery is recognition only; it grants no power and never gates the next level.

What changes as you climb

Levels 1–6: two or three blocks introduce placement and rotation, ending with a short recovery board.
Levels 7–12: three or four blocks introduce flip, concavity and edge exclusion.
Levels 13–24: one bolted light is already filled and cannot be covered. Four- and five-block puzzles teach how to build around it.
Levels 25–30: each puzzle has five blocks in total, including one whole colored block that starts fixed. Movable blocks now use deterministic scrambled orientations.
Levels 31–36: five-block puzzles use narrow entrances, chambers and corridors as placement-order clues.
Levels 37–42: five-block puzzles combine two bolted lights with shallow, visible wrong branches; level 42 returns to one light as a recovery.
Levels 43–48: five- and six-block synthesis boards combine the learned constraints without adding another control rule.
After level 48: the current versioned procedural long line grows toward eight blocks. Bolted lights return at level 121, the board changes to 10×10 at level 241, and two bolted lights become standard at level 301.

Strategy tips

Corners first. Cells with only one or two lit neighbours accept very few shapes. Fill the corners and narrow spurs of the map before the open middle.
Place the awkward blocks early. Long bars and crosses have few legal homes; squares and small elbows are flexible. Spend your freedom on the fussy pieces while the board is still open.
Count before you commit. If a placement would strand a region of, say, three cells and none of your remaining blocks has three cells, it is wrong — take it back now, not four moves later.
Around a bolted light, think in rings. Treat the locked cell as solved space and an obstacle. Check which orientations collide with it before committing.
Use a fixed block as evidence. Its edges eliminate overlaps and often reveal which remaining shape must fill a neighbouring chamber.
Chasing stars or Mastery? Plan before placing. Stars reward a fast clear; Mastery additionally tracks Hint, Clear, Undo and transform discipline.

Frequently asked questions

Is BLOCK/08 free to play?: Yes: free, in your browser, with nothing to install and no account to create.
Do I need an account to save progress?: No. Progress, stars, streaks and achievements are saved automatically in your browser on your device. See the privacy policy for details.
What happens if I miss a Daily?: Your streak resets to zero, but the flame starts again with your very next Daily clear.
Can I replay old levels?: Yes. Open the level map (▦), browse chapters, and tap any lit bulb to improve stars, active time or ◆ Mastery.
Does the game work on phones?: Yes. The block tray docks to the bottom of the screen, and while dragging, the preview floats above your finger so it never hides the landing spot.

▶ Ready? Play BLOCK/08 now