French Wrench
(Published on 24. November 2025, 21:31 by SennyK)
German + Dutch = French? I do not know whether this math is correct, but you can find out by solving the puzzle ;-)
I hope you will enjoy and I would be really grateful for all the comments and ratings.
Normal sudoku rules apply.
German whisper: Neighbouring/adjacent digits along a green line have a difference of at least 5.
Dutch whisper: Neighbouring/adjacent digits along an orange line have a difference of at least 4.
Parity: Neighbouring/adjacent digits along a red line alternate between odd and even.
4-modular: Any sequence of 4 adjacent digits along a turquoise line must include exactly one digit from each of the four modulo 4 groups: {1, 5, 9}, {2, 6}, {3, 7}, and {4, 8}.
Kropki dots: Digits in cells joined by a white dot are consecutive. Digits in cells joined by a black dot are in a 1:2 ratio (i.e., one digit will be double the other). Not all dots are given.
If you liked this puzzle, I recommend trying out my other puzzles: The Erica Series:★☆☆☆☆: 1, 2, 4, 5, 6, 12, 15, 17, 23, 26, 27
★★☆☆☆: 3, 7, 8, 10, 11, 13, 14, 16, 18, 20, 24, 25
★★★☆☆: 9, 19, 21, 22 Shading/Ying-Yang:
★★☆☆☆: Pretty Odd Shaded Area
★★★☆☆: (+5)-Yang, Negative 8 YY
★★★★★: Why-Why? Fog of War:
★☆☆☆☆: Erica 12, Erica 17
★★☆☆☆: It's What You Do in the Dark That Puts You in the Light, Find It All, What the Fog?, Erica 20
★★★☆☆: Broken Flashlight in the Dark Pencil Puzzle/Sudoku Hybrid:
★★☆☆☆: Masyu (Short) Sudoku
★★★☆☆: Tetromino Sudoku
Various Puzzles:
★☆☆☆☆: Blown Fuses in Electrical Installation, Let Me Introduce Myself, French Wrench
★★☆☆☆: Symmetrical Fan, Night Club, Important Hour on the Clock, What Was the Sum Again?, Disgroup Joints, 10-Arrows, Antiking Dutch Skyscrapers
★★★☆☆: Cops & Robbers, Positive Symmetry, Doppelgänger Killer 1-25
★★★★☆: Liars. Liars Everywhere.
Solution code: Ninth (9th) row of the grid from left to right.
Comments
on 26. November 2025, 10:03 by Myfyr MJ
Very nice puzzle but I found it very hard, 57 minutes, but I was also watching Coronation Street at the same time!
on 26. November 2025, 02:12 by rychuuu123
Fun puzzle! It was a little bit harder than "usual" 1* (Or maybe I missed the trick). For me was the Box 7 which broke the puzzle ;)
on 25. November 2025, 22:30 by VitP
careful examination of box 9 is required to keep it to level 1
on 25. November 2025, 14:32 by Ragna
Fun puzzle! Thank you. :-)
SK: Thank you for your kind comments :-)
on 25. November 2025, 14:07 by sparkymanu
Nice wrench ! I had more trouble than your usual 1* puzzles, I wonder if this one should go 2 ? I feel like dutch is so much harder than german whisper to go through
SK: Thanks for solving! I have published it as 2*
