The grid is made up of magnetic and neutral plates. Each magnetic plate has two halves: one positive (+) and one negative (−). Halves with the same symbol can not be horizontally or vertically adjacent. The numbers outside the grid indicate how many magnetic halves of each kind can be found in that row or column.
The diagram forms a torus. E.g. rows and columns have to be regarded as circles.
Solution code: Row 3 followed by column 3, + and - for the poles, N for neutral fields.
on 18. January 2013, 13:30 by Statistica
Klasse. Optisch ansprechend, toll konstruiert und viele neue Schlussweisen durch das Toroidale.
on 13. January 2013, 13:35 by Luigi
Ibag.... find ich gut! ;-))))