What's My Line
(Published on 11. October 2022, 18:51 by EPH)
This is an older puzzle, and I think this was my first use of the Anti-palindrome constraint. Please leave a comment below what you thought of this puzzle. Difficulty is around 2.5/5 I think. There is a tricky bit in the middle.
Normal sudoku rules apply.
Diagonals: each of the main diagonals must contain all of the digits 1 to 9.
Between line: all digits on the line must have values strictly between the values of the circles at the ends of the line.
Thermometer: values of cells on the thermometer are strictly increasing from the bulb end.
German whispers line (Green): consecutive cells along the line must have a difference of at least 5.
Renban line (purple): cells on this line have values that form a set of consecutive numbers, in any order, with no repetition.
Palindrome line (grey): cells equidistant from the middle must have the same value eg 146641.
Anti-palindrome line (red): cells equidistant from the middle must have values which sum to 10 eg 421986. Equivalently: the Nth digit from one end plus the Nth digit from the other end must sum to 10.
Solution code: Enter row 2 followed by row 6, with no spaces.
Comments
on 11. October 2022, 21:38 by sujoyku
I would rather estimate the difficulty between 3 and 4/5. But that also might be due to the fact that I was somewhat stuck missing out on some diagonal action. :)
In any case, this is a very nice puzzle and an enjoyable challenge. Thank you for sharing, EPH!
