The name of this puzzle is Blindflug - the German word for 'blind flight'. This puzzle is so easy, you surely could solve it blind :-).
Normal Sudoku rules apply. Place the digits 1-9 once each in each row, column and box.
German Whispers: Adjacent digits on a green line must differ by at least 5.
Kropki dots: Digits separated by a coloured dot must differ by exactly the amount given:
White: Difference of 1.
Blue: Difference of 2.
Orange: Difference of 4.
Yellow: Difference of 6.
Digits separated by a black dot must be in a 1:2 ratio.
Fog of war: Placing correct digits may or may not clear fog around the grid.
To clarify the colours: The kropki dots in R2C4-R2C5 and R7C4-R8C4 are orange, the dot in R5C7-R6C7 is yellow and the one in R5C7-R5C8 is blue.
You can solve the puzzle here:
Solve on Sudokupad
Solution code: Row 9
on 12. September 2025, 12:11 by VitP
very scary, so i closed my eyes and solved it blind
on 12. September 2025, 05:56 by Pairot
Very impressive use of the fog!
on 12. September 2025, 00:37 by Mutiny
it was stressful! nice job!
on 12. September 2025, 00:02 by Buttafingazz
Very enjoyable, and almost stressful!
on 11. September 2025, 20:48 by Rockon101000
Lovely break in which I very much enjoyed. Took me 11:21.
| Difficulty: | ![]() |
| Rating: | 88 % |
| Solved: | 131 times |
| Observed: | 2 times |
| ID: | 000P53 |