Normal sudoku rules apply. Orthogonally adjacent digits must not be consecutive. A digit in a circle or square must not be a multiple or divisor of any orthogonally adjacent digit. Grey circles contain odd digits. Grey squares contain even digits.
Normal sudoku rules apply. Orthogonally adjacent digits must not be consecutive. A digit in a circle or square must not be a multiple or divisor of any orthogonally adjacent digit. Grey circles contain odd digits. Grey squares contain even digits.