The whole diagram has to be divided into rectangles of two orthogonally adjacent cells respectively. In each rectangle the contents of the cells are swapped and then an Oc2podspath has to be drawn through the diagram:
Draw a continuous tour by connecting each cell with two adjacent cells. The path moves horizontally, vertically or diagonally from cell to cell. The path might intersect itself. The numbers prescribe how sharp the path in the center of that cell turns. Put in each cell a fitting and correct angle. Each cell with value 1 contains a sharp curve; each cell with value 2 contains a right angle; each cell with value 3 contains a gentle curve and each cell with a 4 is passed straight.
Example:
Solution code: All cells of the changed diagram in normal reading direction
on 18. February 2013, 14:28 by CHalb
Stichwort hinzugefügt
on 23. January 2013, 15:57 by CHalb
Anleitung präzisiert
on 23. January 2013, 15:42 by Toastbrot
@Rollo: Danke für den Hinweis auf das veränderte Diagramm.
on 21. January 2013, 20:08 by CHalb
Anleitung korrigiert; hier sind's ja Felder und keine Kreise.
on 20. January 2013, 15:54 by Rollo
Lösungscode: Alle "Kreis"inhalte des veränderten Diagramms!