Clock Faces Sudoku
Inspiriation for this type comes from WSC 2018.
Solve online in F-Puzzles or in CtC-App (thanks Nick Smirnov!)
Apply classic sudoku rules. Four digits around a white circle are placed clockwise in a strictly increasing order starting from any one of the four cells. Four digits around a black circle are placed anti clockwise in a strictly increasing order starting from any one of the four cells. All possible circles are marked.
Solution code: Row 3, followed by column 1.
on 3. November 2021, 06:07 by Richard
Added links for online solving. Thx Nick!
on 21. October 2021, 16:44 by glum_hippo
Very enjoyable!
on 21. October 2021, 12:39 by Nick Smirnov
f-puzzles:
https://f-puzzles.com/?id=yf4o8r2q
CTC App:
https://tinyurl.com/u4w84uwe
on 20. August 2020, 15:32 by Phistomefel
Very nice one, Richard! This puzzle gave me an idea and I think I am going to do it just like cam. :-)
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@Phistomefel: you are more than welcome! :-) Fortunately sudoku types are not copyrighted, otherwise SVS would only contain less then 15 episodes!
Looking forward to your creation. ;-)
on 20. August 2020, 14:54 by Phistomefel
@panthchesh: Your Penpa-implementation of Richard's puzzle is missing a white circle in the crossing R56C67.
on 20. August 2020, 07:31 by Richard
@cam: by the looks of it, you didn't wait long indeed! :-) :-)
I am not a great fan of Klein's bottles in sudoku, so I don't think I'll share your enthusiasm vice versa. ;-)
on 20. August 2020, 05:55 by panthchesh
here is a penpa for you to use: https://tinyurl.com/y5qmjpc3
Thanks @Phistomefel!! :)
on 15. August 2020, 20:14 by cam
Gorgeous puzzle! I can't wait to steal this style :D
on 26. April 2019, 17:31 by Rollo
@bob: the last numbers in row 3 and row 7 are wrong.
on 6. November 2018, 01:11 by zhergan
Very nice and tricky. Thanks Richard..