Normal sudoku rules apply: place the digits 1 to 9 in every row, column, and 3x3 box.
Anti-knight: Cells separated by a knight's move (in chess) may not contain the same digit.
Killer: Digits in a cage sum to the small clue in the cage's top-left corner. Digits may not repeat within a cage.
Solve online in SudokuPad.
Solution code: Row 2 (9 digits)
today, 05:19 by vitray
This is somewhere between 1 and 2 difficulty