A troll under a bridge / Ein Troll unter einer Brücke
(Published on 11. November 2025, 01:23 by Caterpillar)
Classic 9x9 sudoku rules apply.
German whisper line (green) - neighbouring digits along this line must differ by at least 5.
Parity lines (red) - digits along these lines alternate between odd and even.
Region sum line (blue) - box borders divide this line into segments, each segment sums to the same number.
Nabner lines (yellow) - any digit on a nabner may not be consecutive with any other digit on the same line. Be advised there are FOUR STRAIGHT nabner lines, which touch/intersect. (for clarity they are: r1c2 to r4c2, r1c3 to r3c1, r2c1 to r2c4, r2c2 to r3c3).
White kropki dots stand between cells with consecutive digits.
The gray square must contain an even digit.
One of the Sudoku boxes is a magic square, wherein all rows, columns and both diagonals sum to 15. The player must determine which box this applies to.
Solution code: Row 7
Comments
on 18. November 2025, 23:29 by Scorps
Had to learn a couple of things about magic squares in order to solve but got there in the end! Nice puzzle, thanks for sharing.
on 11. November 2025, 14:44 by zonny
Really fun puzzle! Thanks!
on 11. November 2025, 14:24 by VitP
easy for experts, doable by non-experts --> level 2.
+1 for reading german
lol
on 11. November 2025, 12:04 by Snookerfan
Fun puzzle! Approachable when you read the rules carefully, which I did not at first. I really liked what the parity lines did. Thanks
