Fill in the squares with 1 to 9 according to the following rules:
1) The numbers in each row, column, or diagonal must not be repeated.
2) The numbers in each 3×3 square (surrounded by thicker borders) must not repeat.
Fill in the squares with 1 to 9 according to the following rules:
1) The numbers in each row, column, or diagonal must not be repeated.
2) The numbers in each 3×3 square (surrounded by thicker borders) must not repeat.