This square jam is a quick one. I recall setting this sometime around the time I was setting Card VII of The 22 Major Look-Airna (25) . Creator's time: 0:30 Rules: Standard Araf Rules \ Divide the grid into regions of orthogonally connected cells. Each region must contain exactly two circles and have an area that lies between the two numbers in the circles, exclusive. Difficulty : 2/14 Online interface (puzz.link)
Here's another oldie. Creator's time: 1:59 Rules: Standard Araf Rules \ Divide the grid into regions of orthogonally connected cells. Each region must contain exactly two circles and have an area that lies between the two numbers in the circles, exclusive. Difficulty : 4/14 Online interface (Penpa+)