Galaxies Symmetry Puzzle Unblocked

Galaxies Symmetry Puzzle hands you an empty grid with dots scattered across it and one clean rule: cut the board into shapes so that each shape spins around its own dot and lands back on itself. There are no numbers to add up and no colors to match, just geometry and patience. James Harvey wrote it for Simon Tatham’s puzzle collection, and every board is checked by a solver before it reaches you. This unblocked copy keeps all the original sizes and both difficulty settings.

The Shape of a Galaxy

Each square on the board ends up inside exactly one galaxy, and each galaxy owns exactly one dot. Picture sticking a pin through the dot and turning the shape halfway round. If the outline matches itself, it is symmetric, and that is what every galaxy needs.

You mark the answer by placing walls on the lines between squares. A galaxy is valid when its outline is closed, its single dot sits at the true center, it is symmetric and no leftover walls cut through its middle. Valid galaxies light up as you go, which gives you a running check. The puzzle ends when the only walls left are the ones dividing one galaxy from the next.

Boards come in 7x7, 10x10 and 15x15, each at Normal or Unreasonable. A Custom option lets you pick any size and difficulty.

Galaxies Symmetry Puzzle controls

To do this	Keyboard	Mouse	Touch
Add or remove a wall	Arrow keys to move, then Enter on a line	Left-click the line	Tap the line
Pull a note 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
Reposition or discard an arrow	—	Right-drag it elsewhere, or off the grid	Press and hold it, then drag
New board, undo, redo	N, U, R	Menu buttons above the grid	Menu buttons above the grid

Working a Board From Scratch

Start with the forced walls. If two dots sit in the centers of side-by-side squares, those squares cannot share a galaxy, so the line between them must be a wall. Sweep the board for these first.

Pair every square with its twin. Whenever you decide a square belongs to a dot, the square mirrored through that dot belongs to it as well. If the twin would fall off the board or onto another dot’s turf, the first square cannot belong there.

Hunt for squares with one option. Tucked-away corners often have only one dot whose mirror image fits. Claim them early and the edges of the puzzle firm up.

Leave yourself notes. Drag an arrow out of a dot and drop it on a square you have assigned but not yet fenced in. The arrow keeps pointing back to its dot even as you move it.

Trust the shading. A closed region that refuses to light up usually has a hidden inner wall or a square whose twin is missing.

Save Unreasonable for when Normal feels routine, since it can demand trial and error.

Why It Stands Apart

Most grid puzzles are about counting. This one is about seeing, and the moment a lopsided blob suddenly snaps into a neat pinwheel is very satisfying. It suits players who like spatial reasoning more than arithmetic. For more line-drawing logic, try Loopy Loop Puzzle or the diagonal grid of Slant Diagonals.