Logic Masters Deutschland e.V.

I tried to make a hard but not a brutal puzzle with these rules and I ended up with this sudoku. I hope you will enjoy solving and any feedback would be appreciated.

Rules:
1) Normal Sudoku rules apply:
Place the digits 1-9 into each cell of the grid. None of the rows, columns or boldly outlined 3x3 boxes contain repeated digits.

2) Normal Arrows rules apply:
The digits along each arrow must sum to the digit in the circled cell. Digits may repeat along an arrow if permitted by other rules.

3) Anti-knight rules apply:
Cells a chess knight's move apart cannot contain the same digit.

4) Normal Renban rules apply:
Digits along each renban line must be a set of consecutive digits in any order, and must not repeat.


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