Anti-King Sudoku

Anti-King Sudoku is a sudoku variant. Its change is basic. It adds a clue: no same number can appear one cell diagonally adjacent from itself. This is a good, clever twist. The rules are similar to normal Sudoku: Place a digit from 1-9 into each row, column and 3x3 box only once. No pair of diagonally adjacent cells may contain the same digit. Enjoy the puzzle!