Adim is a real pinky stretcher and difficult chord to play. The index finger is placed on the second fret of the G string. Next the middle finger plays the third fret of the C string and the ring finger is on the third fret of the A string. We then have to reach the pinky all the way to the fifth fret of the E string. It will be hard to keep the top joints straight up so try and place as little as the fingertip as possible to avoid muting nearby strings. It is definitely awkward and uncomfortable for your hand when first played.