Subsequent to our report on the PuzzleRun-App (see here) we present the fourth sample of the Logic Masters club. It is a Magnets evolving into an Anti-Magnets.
The development of a magnet into an anti-magnet takes place on a charged plate. This plate is both magnet and anti-magnet. All the other charged plates belong to exactly one of the two puzzle types. Neutral plates can not be assigned by all means.
Solution code: Row 4 and column 4, + and - vor charged, N for neutral fields.