Net
Rotate each tile to reconnect the whole network to its power source
Click or tap a tile to turn it anticlockwise; right-click (or Ctrl-click) turns it clockwise, and middle-click (or Shift-click, or a long press on a touch screen) locks or unlocks it. A locked tile cannot be turned. Arrow keys move the cursor tile, wrapping round the edge; Enter or A turns it anticlockwise, D clockwise, F half a turn, Space or S locks it, and J jumbles every unlocked tile. Ctrl or ⌘ with the arrows moves the power source; Shift moves the display origin on wrapping boards. Ctrl or ⌘ Z undoes; Shift Z redoes.
Progress saves on this device.
How to play
Every square holds a piece of wire. Turn the pieces so that every one of them joins the power source, the square marked with a dot. Wires that the power reaches are drawn thick; the count shows how many tiles are powered. The puzzle has exactly one solution, and it never contains a loop.
On a wrapping board the wires continue across one edge to the opposite one; the display origin moves which tiles are shown at the top left without changing the puzzle. Lock a tile when you are sure of it: locked tiles cannot be turned, and two locked tiles whose wires do not match are marked with a dashed error line, as is any loop.
Undo and Redo follow your history; Restart returns to the starting position and can be undone. Solve completes the puzzle for you, which does not count as a win.
Engine: Simon Tatham’s Net, from the Portable Puzzle Collection. MIT license and credits.