Logic Masters Deutschland e.V.

Rules:

• Classic Sudoku: Every row, column and 3x3 box must contain every number from 1 to 9.
• Region Sum Lines: Box borders divide a blue line into multiple segments which have the same sum. All such lines must have the same sum.
• Palindrome Lines: Digits along a grey line read the same backwards and forwards.
• X: Two digits separated by an X clue sum up to 10.

Play it online in SudokuPad.