Logic Masters Deutschland e.V.

Normal Sudoku rules apply. Each row, column and 3x3 box contains each number from 1 to 9 exactly once.

Killer Sudoku rules apply. The sum of all numbers in a cage (marked with dashed lines) must match the small number printed in its corner. No number appears more than once in a cage.

Sandwich Sudoku rules apply. The numbers outside the grid show the sum of the digits sandwiched between 1 and 9 in that row or column.

Inequality sign between two cells shows which one contains the lower/higher digit.

The letters are clones of each other, which means they contain the same digits in the same order:

K=B

I=I

1st L= 1st L

2nd L = 2nd L

The coloring is just design.

The puzzle is also available online.