Solution code: row and column of the gray cell which contains the 7 (18 digits)
on 9. November 2021, 18:37 by grkles
That was fabulous! I really, really enjoyed it.
on 8. November 2021, 09:28 by Playmaker6174
Wow, what a wonderful and fun puzzle! It took me way longer than it should be to notice the missing pencil mark, almost challenged my scanning to the limit. Very rewarding at the end :)
on 19. October 2021, 02:23 by Willy Wonka
Loved this puzzle! Very narrow solve path but if you can find the steps then they are not too difficult to understand. Great fun!
on 17. October 2021, 21:33 by ICHTUES
I added the given colour in r7c9, because the puzzle had 2 solutions until now. Thanks very much to Vebby, who pointed that out and had the idea of giving exactly that last given.
on 17. October 2021, 21:23 by polar
Beautiful puzzle. Some lovely logic steps in there - thank you!
on 17. October 2021, 11:50 by cdwg2000
Can you detail the "extra-region 1-9" mentioned in the topic? Thank you!