Logic Masters Deutschland e.V.

• Normal sudoku rules apply.
• Adjacent digits along the orange curve must have a difference of at least 4.
• Cells with circles contain odd digits.
• Green/grey lines are palindromes: their digits read the same in either direction. Different shades indicate different palindromes, and all of them are 4 cells long.
• Digits joined by a black dot are in 1:2 ratio. Not all possible dots are given.

Online in Sudokupad

Note: r4c2 and r6c8 are part of the orange curve.