Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Purple clues are X-Sums. Orange clues are simultaneously X-Sums, Sandwich, and Little killers.

• X-Sums: A clue outside the grid gives the sum of the first X digits of that row or column from the direction of the clue, where X is the digit placed in the cell next to the clue.
• Sandwich: A clue outside the grid gives the sum of the digits appearing between the 1 and the 9 in that row/column.
• Little killer: A clue outside the grid gives the sum of all digits along a diagonal leaving the clue. In this puzzle. both diagonals sum to the clue.

The values for the X and Y clues must be deduced. They have a difference of 3.

https://sudokupad.app/u1b775w6qj

Example

The 6 is an X-Sum clue and sums the first three digits: 3+2+1=6

The 5 is an X-Sum clue and sums the first two digits: 2+3=5. The 5 is also a Sandwich clue and the digit between the 1 and 6=5. Finally, the 5 is a Little Killer clue. Both diagonals are 3+2=5 and 1+1+3=5.