Sudoku Variants Series (292) - Coordinates Sudoku
(Published on 28. October 2020, 00:00 by Richard)
Coordinates Sudoku
Inspiration for this type comes from stephane.bura.
Solve online in Penpa+ (Thanks stephane!).
Apply classic sudoku rules.
Each 3x3 block contains information about the digit that is placed as background of that block. If two neighbouring digits X and Y are connected horizontally, vertically or diagonally by a line, the digit must appear in at least one of the cells (row X, column Y) or (row Y, column X). If two neighbouring digits X and Y are not connected by a line, the background digit is not written in one of the cells (row X, column Y) and (row Y, column X). In the example: the 1 must appear at least in one of the cells with a circle, but is not allowed in one of the cells with a cross because there is no line between 2/3 and 3/4.)
Solution code: Row 9, followed by column 9.
Comments
on 20. November 2021, 16:32 by Richard
Added link for online solving. Thx Stephane!
on 3. September 2021, 11:57 by pin7guin
Nicht abschrecken lassen!
Das Rätsel ist gut logisch lösbar - und braucht wirklich volle Konzentration...
on 8. August 2021, 00:11 by Krokant
Gorgeous puzzle. :)
on 14. January 2021, 16:08 by Mody
Wunderschön und kniffelig
on 6. December 2020, 15:25 by Richard
Only 25 solves in five weeks? No other enthusiasts?
on 13. November 2020, 21:28 by ibag
Oh ja, Gelegenheit für Schusselfehler gabs hier reichlich. Ich durfte es auch ein paarmal machen. - Aber hat Spaß gemacht!
on 10. November 2020, 21:39 by ffricke
Sehr schönes Rätsel, das ich dreimal anfangen durfte, da hier höchste Konzentration nötig war.
on 29. October 2020, 19:50 by HaSe
Sehr geil
on 29. October 2020, 06:06 by glum_hippo
I'd recommend the following clarification: "If two neighbouring digits X and Y are not connected by a line, the background digit is not written in _either_ of the cells" - that is, I would replace 'one' with 'either'
on 28. October 2020, 23:11 by zuzanina
Wow!! :-)
on 28. October 2020, 18:29 by stephane.bura
Wonderful opening and surprises along the way :)
Thanks Richard!
on 28. October 2020, 12:17 by marcmees
very nice. thanks
on 28. October 2020, 11:54 by cdwg2000
Very good, but the difficulty may be four stars.
on 28. October 2020, 10:06 by stephane.bura
This is fantastic! :)
Here's the grid on Penpa+ https://git.io/JTX6g
on 28. October 2020, 08:43 by r45
Höchst interessanter Einstieg, super.
on 28. October 2020, 03:03 by Rollo
:-)
