A black dot means: one digit has a double value of the other. A white dot means: two neighbouring digits have a difference of 1. When no dot is between two cells, none of the constraints appears.
Solution code: Row 12
on 9. December 2022, 20:27 by Nick Smirnov
Penpa:
https://tinyurl.com/2osy5f9k
Phew, what a puzzle! I remember that in the mid-2000s I stumbled upon some 16x16 sudokus in a book of some British lady whose name I can't recall. I found them extremely boring, although I liked 9x9 sudokus from this book (despite that they were most definitely computer generated and by today standards I wouldn't touch them).
But this gem was exciting until the very end. Plain old kropki tricks get a second wind here. And I see that your passion for negative constraint accompanies you for quite some time. ;-)
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Reply: thanks for your kind words!
And yes: I am convinced life is much more interesting with the negative constraints!
on 14. May 2010, 14:41 by Richard
@uvo: Wow! That must have been hard work!
To be honest, I really don't know if it's unique without the extra constraints. The puzzle was built on the extra constraints, acutally. ;-)
on 14. May 2010, 14:35 by uvo
If I am not mistaken, the solution is unique even if you ignore the Windoku part... I realized there was additional information when I was almost finished. Took me several hours that way :-)
on 20. December 2009, 23:13 by Carambu
War eigentlich gar nicht schwer. Aber die ständige Angst einen Fehler reinzubatzen.
on 19. December 2009, 21:36 by miez
Wow! Tolles Rätsel! Hat nur ein paar Wochen gedauert...
on 2. December 2009, 01:23 by Eisbär
Aaarrrggggggggggghhhhhh what a nightmare!!!!!!!!!! But still I liked this one... thanx Richard!
on 28. November 2009, 19:03 by sternchen
Vielen Dank...kann mich nur anschließen....ein tolles Rätsel! Gerne mehr davon:-)
on 28. November 2009, 01:21 by pin7guin
Super! Hat echt Spaß gemacht. Danke, Richard!
Und: Macht Appetit auf ein 25er... ;-)
on 27. November 2009, 18:01 by cornuto
Ein Traum von Rätsel. Herrlich. Vielen Dank.
on 27. November 2009, 17:26 by r45
Wunderschön, das Rätsel. Ein Genuss für jeden Kropki-Liebhaber und die, die es bald werden.
on 27. November 2009, 17:10 by Statistica
Man muss hochkonzentriert bis zum Schluss sein. Größer darf's nicht werden ;-)
on 27. November 2009, 16:28 by ibag
Ein Riesenspaß!!! Thank you, Richard!
on 27. November 2009, 12:25 by flaemmchen
Pünktlich zum Wochenende wieder ein schönes Kropki-Rätsel :-))) Danke Richard!