Normal sudoku rules apply. Cells separated by a knight's move (in chess) cannot contain the same digit. The grey line is a palindrome: its digits read the same in either direction. Clues outside the grid give the sum of the indicated diagonals.
Normal sudoku rules apply. Cells separated by a knight's move (in chess) cannot contain the same digit. The grey line is a palindrome: its digits read the same in either direction. Clues outside the grid give the sum of the indicated diagonals.