Logic Masters Deutschland e.V.

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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Sudokupad

Puzzle: