Normal sudoku rules apply.
Clones: There are 3 shapes in the grid that repeat 3 times each. Groups of the same shape are clones, which repeat the same digits in the same relative positions. Note: The clones have been marked in different ways in different online solving tools; see below.
Mathrax: White circles have math operators that show relationships to diagonally connected cells the clue touches. + shows the sum, - shows the difference, * shows the product, and / shows the quotient. A ? indicates any number, but is the same for both diagonal pairs it touches. The "O" indicates that all four digits touching that circle are odd.
Solve online:
Lösungscode: Row 4, followed by column 4 (18 digits, no spaces).
am 26. April 2022, 15:49 Uhr von Playmaker6174
A fascinating and quite challenging puzzle, once I got some grips early on the puzzle started to unveil itself and the result was very rewarding :)
am 20. April 2022, 19:27 Uhr von Mr.Menace
Cool puzzle with some nice interactions!
am 20. April 2022, 12:25 Uhr von grkles
Fixing Penpa links and puzzle image to add missing circle.
am 20. April 2022, 11:40 Uhr von Vebby
Really interesting logic! Challenging break-in, but fairly smooth after that.
Till the error is corrected, future solvers please note that the puzzle image here and in the Penpa links is missing one white circle between r67c67 (refer other links).
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@Vebby - good catch, thanks so much! The missing circle has been added to the penpa links and the puzzle image.