Normal sudoku rules apply. The grey highlighted regions contain the digits 1 to 9 once each. Cells separated by a knight's move (in chess) cannot contain the same digit. Digits along an arrow must sum to the digit in that arrow's circle.
Normal sudoku rules apply. The grey highlighted regions contain the digits 1 to 9 once each. Cells separated by a knight's move (in chess) cannot contain the same digit. Digits along an arrow must sum to the digit in that arrow's circle.