Suchen auf Abwegen

Suchen auf Abwegen
As you know, Marienberg is best known for its mining history. In the 18th century, the so-called Fabianhalde was one of the most productive ditches in the Marienberg area. The geocache "Suchen auf Abwegen" revolves around this heap.

These are the coordinates of the cache:

N 50° 39' z.x31" E 13° 9' 56.y36

As you can see, some digits are still missing. To find out, you have to solve a few puzzles. For the variable x go to the following coordinates: N50°39'20.325'' E13°10'5.6352''
Find out how many hours the vet clinic is open in a week. x is calculated as follows: x=8-number of opening hours per week
Now walk from this clinic to the intersection with the following coordinates:
 N50°39'23.623'' E13°9'59.011''
On your way you will see some gates. Count any gate that is part of the fence. Form the checksum for the variable y from their number.
The Fabianhalde is near your current position. Find out in which year it was sunk and calculate the  checksum from the year. z is now calculated as follows: z=2+checksum of the year of sinking
Congratulations! Your coordinates are now complete. Have fun finding the cache.

Note: It's pretty hard to find the cache in the winter!

Contains: First finder gift of 1 euro, logbook, exchange items, pencil