Picture a pinwheel: spin it halfway and it looks the same. Every region you carve in this puzzle has to pass that test. You get a grid dotted with small circles, and your task is to wall it off into shapes, each built around exactly one dot.
Galaxies Symmetry Puzzle unblocked runs straight in the browser. It is part of Simon Tatham's Portable Puzzle Collection, with the game written by James Harvey, and every board is checked by a solver before you see it.
How to play Galaxies Symmetry Puzzle
Each square must end up in one region, and each region holds one dot at its exact center. Turn the region 180 degrees around that dot and its outline has to land on itself. A dot can sit in a square, on the line between two squares, or at a point where four squares touch.
You build the answer by placing walls on grid lines. Click or tap a line to add a wall, and again to remove it. When a closed area has one dot in the middle, is symmetric and has no stray walls inside, it lights up. The board is solved when every wall separates two different regions.
For notes, drag an arrow out of a dot and drop it on a square you think belongs to it. Pick a 7x7, 10x10 or 15x15 board, each in Normal or Unreasonable, or set your own size under Custom.
Controls
| To… | Keyboard | Mouse | Touch |
|---|---|---|---|
| Draw or erase a wall on a grid line | Arrow keys to move, then Enter on a line | Left-click the line | Tap the line |
| Drag a reminder arrow out of a dot | Enter on a dot to pick up, Enter again to drop | Right-drag from the dot to a square | Press and hold the dot, then drag |
| Move or delete an arrow | — | Right-drag it elsewhere, or off the grid | Press and hold it, then drag |
| New game, undo, redo | N, U, R | Menu buttons above the grid | Menu buttons above the grid |
Tips
- Think in pairs. Whenever you give a square to a dot, its twin on the far side of that dot belongs too.
- Start with lonely squares. When just one dot can claim a square symmetrically, that square is already decided.
- Separate close neighbors. Two dots centered in side-by-side squares always need a wall between them.
- Drop arrows as you go. They remind you which dot owns a square before you have walled it in.
- Check the glow. A closed shape that stays dark has a problem, often a missing twin square or an inner wall.
Galaxies Symmetry Puzzle questions
How is Unreasonable different from Normal?
Normal boards can be cracked by steady logic. Unreasonable boards may make you guess and backtrack, so lean on the unlimited Undo.
Is there a hint or solve button?
Yes, the menu has a Solve option that fills in the answer. You can also restart the same board or start a new one.
Can I play with a touchscreen?
Yes. Tap a line to toggle a wall, and press and hold a dot to drag a reminder arrow. On a 15x15 board, a sideways phone gives you bigger squares.
