Golf Field - Wooden Puzzle Brain Teaser

In this sliding block puzzle the golfer must successfully manage a difficult path of water, trees and sand traps before they can successfully sink the golf ball.
The objective here is to slide the pieces around until the small ball, sitting on the tree (inside the large square) is down the hole that lies at the far end of the course so the ball will roll down the hole built into the puzzle and out of the front, all that in the minimum number of moves. Once you master one starting position, you can try other positions. See on the below picture 16 more starting position options: