Either by Dr. MacKenzie or the devil, possibly both! It needs a priest to perform an exorcism.
I think it's the single hardest putting surface I have ever played.
Today, under 70 degree weather, I was determined to break my streak of 3 putting this hole.
The pin was back middle. It played about 170. I hit a strong tee shot that ended up about 20 feet pin high to the left of the hole. I knew it was fast and slightly down hill with about a 4 foot break. I stroked what I thought was a good putt and some demoniac power then grabbed the ball, slowing it down to half it's speed and propelling it dead right. It started a slow trickle, and then picking up speed.
It finished some 70 to 80 feet away.... My next putt was 30 feet short.
Pasa has many greens like this. It is the poster child for greens built in 1929 that do not fit todays agronomy and equipment.
It doesn't look that hard from the tee. It doesn't appear to have the slope as the the 16th or 18th but is the single hardest green to putt at all of Pasatiempo.
Do not stare at the photo, it may possess you.