Fifteen
played
Took 3 times to the park to get it to work with a Garmin Oregon, but some of the problems were location and my impatience. It plays slowly on my Oregon. Have to wait for the screens to come up themselves, if you click on a command while it is thinking, it will freeze up. Also, tried it 4 times in one place in the park, then returned and tried it 3 times again in the same place. Was forced to move due to a softball game. Moved 300' north in same park and it worked first time there, not quickly, but twice a quick as the bad spot in the park. Enjoyed the puzzle part and finding the correct columns and rows to put the correct number.