This is a series of puzzle caches based upon the UCI World Tour. Each puzzle builds on the next and they will get increasingly more challenging as you progress through the series. The puzzles will lead to a trail of caches along official cycle routes and therefore are best done by bike. The caches are small and will not contain swaps but could cope with a small TB or geocoin.
The Paterberg is one of the most iconic climbs on the ronde van vlaanderen (Tour of Flanders). The road was owned by a farmer who was a cycling enthusiast and wanted the ronde van vlaanderen to go past his farm. So he cobbled the whole street and the rest is history. The weight limit on the Paterberg is A.B tonnes. At one point on the climb there is a double metal gate on each side of the road. On the left hand side as you ascend the hill behind one of these gates is a house. It has C skylights.
Subtract (C-1)(B-5)(A-1) from your Northing for Stage 12.
Subtract (C*2)(B-5)(A-C) from your Westing for Stage 12.
You can validate your puzzle solution with certitude.