Logic Masters Deutschland e.V.

Sandwich/Anti-knight/Diagonal sudoku

Ruleset:

• Standard: Normal sudoku rules apply.
• Diagonal: Each of the long, marked diagonals must contain all of 1-9.
• Anti-knight: No two cells, that can reach each other by a knight's move, may contain the same value.
• Sandwich: The numbers outside the grid, denote the sum of the cells 'sandwiched' between 1 and 9 in the row/column.
• One single cell has a gray square. This means that the cell must contain an even number.

This is a bit of a rehash of an older puzzle, I made a year ago.
The ruleset is extensive, I know - sorry.

Link to puzzle in the Fox editor: PUZZLE

Have a nice day :)