Logic Masters Deutschland e.V.

I've wanted to do more lockout lines, and Isaiah's recent lockout/indexing puzzle inspired me! He did give me a bit of grief for the global entropy :P

Rules:

- Normal Sudoku rules apply.

- Global entropy - every 2 by 2 box of cells must contain at least one low digit (1, 2, or 3), one medium digit (4, 5, 6), and one high digit (7, 8 or 9).

- Lockout Lines - digits along a lockout line must not be between the two end digits in the diamonds, which must differ from each other by at least 4.

- 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.

- Dutch Whispers - neighboring digits on an orange Dutch Whisper line differ in value by at least 4.

- Renban - digits on a purple Renban line form a set of consecutive numbers in some order.

- Palindrome - digits on a gray palindrome line read the same backwards and forwards.

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Accessibility - the palindrome line is the line cutting from R5C3 to R3C5, intersecting the lockout line at R4C4. The Renban is in the upper right corner of Box 5; the Dutch Whisper is in the lower left corner. Neither of them intersect the Lockout Lines.

Sudokupad

Puzzle: