Each of the digits 1-9 does appear twice in the lightgreen marked cells. Both grids have the same solution.
Solution code: Column 4, followed by column 6
on 23. January 2021, 19:53 by rcg
Nice Arvid.
on 3. June 2011, 18:58 by sternchen
Richtig schönes Rätsel!!
on 3. June 2011, 16:00 by bartdelft
Sehr gutes Ratsel. Ich freue mich schon auf daB nachste.
GruBe, Bart
on 3. June 2011, 15:55 by bertvenlo
Schones Ratsel Arvid. Wenn kommt daB nachste ?
GruBe, Bert
on 1. June 2011, 17:59 by Mody
Sehr schöner gut lösbarer Killer :)
on 1. June 2011, 15:53 by ibag
Hat mir gut gefallen!
on 1. June 2011, 12:12 by Richard
Nice puzzle! While testing this puzzle for Arvid I found some nice, interesting moves that lead to a quick breakthrough.