Logic Masters Deutschland e.V.

I found this puzzletype here: https://www.janko.at/Raetsel/Linesweeper/index.htm

This is one I set myself:

Rules:

Draw a single closed loop in the grid (that doesn't branch or cross itself). A number in a cell indicates how many of the 8 adjacent cells are visited by the loop. The sections of the loop run horizontally and vertically between the centers of horizontally and vertically adjacent cells. The loop never visites a cell with a number in it.