Rules
• Normal sudoku rules apply.
• Yin Yang: colour the grid using two colours, such that all cells of the same colour are orthogonally connected, and no 2x2 area is fully one colour.
• First seen odd/even (FSOE): odd clues outside the grid give the first odd digit seen from that direction; even clues give the first even digit seen from that direction
• Coloured FSOE: each FSOE clue only sees digits of one yin yang colour, while digits of the other colour are completely meaningless for that clue.
Which colour corresponds to each clue must be determined.
• Fog: some clues are covered in fog. Placing correct digits in the grid may lift some of the fog to reveal more clues.
Note: you may place colours or labels outside the grid to assist your solve. Those won't interfere with the solution checker.
Have fun and keep flutchin'.
Yours, Dying Flutchman
Please click the image to solve.
This is the fourth puzzle exploring the combination of yin yang rules with column and row clues. If you like this puzzle, you might be interested in the earlier ones as well.
Yin Yang Skyscrapers
Yin Yang X-sums
Yin Yang Sandwiches
Solution code: Row 5.
Enter 9 numbers, with each switch in yin yang colour indicated by a * (e.g. 12*3456*78*9)
on 15. November 2025, 03:40 by Jewel
Extremely fun puzzle with a really satisfying solve, I'd definitely love to see more Yin Yang foggy FSOE!
on 11. November 2025, 16:32 by jinkela114514
Nice puzzle, but it should be a 5* difficulty for me.
on 10. November 2025, 08:57 by grrz
Very nice puzzle! It’s not hard, it’s just tricky to track and mark digits in YY and parity at the same time
on 9. November 2025, 22:45 by War
Excellent puzzle. If you're familiar with yin yang puzzles than this should be very approachable!
on 9. November 2025, 20:26 by bansalsaab
Thanks Flutchman for correcting and you infact made it harder.
on 9. November 2025, 20:19 by CitrusGremlin
Lovely and difficult puzzle. Took me about two hours. Thanks for correcting it.
| Difficulty: | ![]() |
| Rating: | 99 % |
| Solved: | 56 times |
| Observed: | 2 times |
| ID: | 000Q1N |
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