Hidden Clones Sudoku
Inspiration for this type comes from Eggr.
Solve online in Penpa+ (thx to Henry!) or F-Puzzles or CtC-app (thx Nick Smirnov!)
Apply classic sudoku rules.
An exact copy (without reflecting or rotating) of the grey shape must be placed twice elsewhere in the grid, including the digits it contains. These cloned shapes may not overlap each other or the original shape. Digits may repeat within a region.
Solution code: Row 7, followed by column 9.
on 4. September 2022, 07:53 by Richard
Added more links and tag for online solving. Thx Nick!
on 28. February 2022, 17:24 by Nick Smirnov
F-puzzles:
https://f-puzzles.com/?id=ydg8kueh
CTC App:
https://tinyurl.com/2p9xbrbh
on 9. July 2021, 06:38 by Richard
Added link for online solving. Thanks to Herry!
on 9. July 2021, 06:37 by Richard
@mackerel: it seems some part of your link is missing. :-)
on 1. July 2021, 05:31 by mackerel
f-puzzles: https://f-puzzles.com/
on 30. June 2021, 04:38 by henrypijames
Penpa+: https://git.io/Jc3WG