Draw vertical/horizontal lines between the dots to divide the grid into regions. All regions have different shapes, that is, no two shapes can be the same after rotation and/or reflection. All region sizes are in the range given above the puzzle. Arrows always point from a smaller to a larger region.
(Rules and example (Range: 3-5) from WPC 2017 IB)
History of the puzzle
First appeared on WPC 2008/Part VII. Author of the puzzle was Anurag Sahay (India).