This was my attempt to defend my title for the Impostor Challenge - alas, I was beaten!
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- Normal Sudoku rules apply.
- Indexing - On a purple index line, the digit in the Nth cell along the line (starting from the diamond) indicates the position along the line where the digit N appears. Eg: 3214 would be a valid line; the 1st digit, 3, indicates that the 3rd digit is a 1, and so on.
- Palindromes - digits on a hollow gray palindrome line must read the same backwards and forwards.
- Ratio Kropki - digits separated by a black Kropki dot have a ratio of 2:1. No negative constraint.
- XV sums - digits separated by X sum to 10; digits separated by V sum to 5. No negative constraint.
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Puzzle:
Solution code: Row 9 left to right
on 27. September 2026, 00:42 by gwai77
Very nice and easy
on 25. September 2026, 04:55 by bugcat
what lovely logic! i think i finally understand indexing lines! thanks for this fun puzzle!
on 25. September 2026, 00:32 by sujoyku
What a lovely, very you puzzle! Thank you for setting and sharing this, Katie!
I am glad that I did not get fooled and recognized your true style. :)
on 24. September 2026, 23:45 by Vaurien
Lovely puzzle, and my 3000th solve on LMD, happy to have it fall on this solve!
on 24. September 2026, 16:02 by Nicho
Nice flow to solve once you figure out the starting options
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