Place all of the digits 1-9 in each row, column & 3x3 box.
Non-consecutive: No two orthogonally connected cells may contain consecutive digits.
Yin-yang: Shade some cells such that all shaded cells form a single orthogonally connected group and all unshaded cells form a single orthogonally connected group. No 2x2 region may be fully shaded nor fully unshaded.
Palindrome: The sequence of values along a grey line reads the same when starting at either end.
Doublers: The value of any unshaded cell is the digit in that cell. The value of a shaded cell is double the digit in that cell.
solve in SudokuPadSolution code: unshaded digits in column 7
on 18. July 2025, 12:09 by cyddrdrd
The solution code is really friendly :)
on 29. June 2025, 21:37 by phil_the
Updated image to match the SudokuPad version
on 29. June 2025, 19:10 by peacherwu2
How come it's different in SudokuPad?
(Phil) apologies, I must have uploaded the wrong version by mistake.
on 19. June 2025, 13:37 by DiMono
What a cool break-in! Great puzzle.
on 29. May 2025, 15:08 by Snookerfan
Great puzzle! Brutal and fun, thank you!
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