Pipes 10×10: the medium board
A hundred tiles, and the classic size for this puzzle. Expect to work from the edges inwards, get stuck in the middle and find the step that unlocks a whole region.
On Hard some of those steps need a short what-if: “if this tile pointed there, two lamps would face each other”.
Rules
Click a tile to rotate it. The puzzle is solved when the pipes form one network from the pump to every lamp, with no pipe pointing at nothing and no closed loop. Water shows how far the pump reaches, and the counter above the board shows how many lamps are lit.
Mouse and keyboard
- Click: rotate clockwise; Ctrl+click: rotate back.
- Right click: pin a tile you are sure of; a pinned tile does not rotate.
- Keyboard: arrows move the cursor, Space or Enter rotates, P pins, Ctrl+Z and Ctrl+Y undo and redo.
Touch screen
- Tap: rotate.
- Long press: pin a tile.
- The Pin button under the board swaps the two: a tap pins, a long press rotates.