Normal sudoku rules apply. Digits along an arrow sum to the number in the circle. Along a thermometer, digits increase from the bulb. Exactly one 3x3 box is a magic square, in which each 3-cell row, column and diagonal sums to the same number.
Normal sudoku rules apply. Digits along an arrow sum to the number in the circle. Along a thermometer, digits increase from the bulb. Exactly one 3x3 box is a magic square, in which each 3-cell row, column and diagonal sums to the same number.