Zeroing In
by FullDeck and Missing a Few Cards
GAS
- Killer cages
- Anti-knight
The brief
Normal sudoku rules apply. Every row, column and box must contain a complete set of the digits 1-9. Normal killer cage rules apply: digits in a cage cannot repeat and must sum to the total in the top left corner of the cage. Normal anti-knight rules apply: cells separated by a chess knight's move cannot contain the same digit.