Classic Sudoku Puzzles (Fun With Sudoku #297, #298)

Any Sudoku Championship is not completed without Classic Sudoku or Standard Sudoku Puzzles. This is the basic Sudoku type and I keep on creating Classic Sudoku puzzles for different Sudoku Events. Here are a couple of Classic Sudoku puzzles that I created for the Asian Sudoku Championships 2018. Now, this championship is over and I am publishing these Classic Sudoku puzzles as part of the Fun With Sudoku Series as the 297th and 298th Sudoku Puzzle in this Series.
First Classic Sudoku Puzzle is themed Smiley Face. Hints given in this Sudoku puzzle make a smiling face. The second Classic Sudoku Puzzle is themed Circles which contains two touching Circles in the center of the grid.

Rules of Classic Sudoku Puzzle

Place a digit from 1 to 9 into each of the empty cells so that each digit appears exactly once in each row, column, and 3x3 outlined box.

Classic Sudoku Puzzles (Fun With Sudoku #297)

Answers to these Classic Sudoku puzzles can be viewed by clicking on the buttons below. Please try your best to solve this Sudoku puzzle before looking at the answer.

Classic Sudoku Puzzles (Fun With Sudoku #298)

These two Standard Classic Sudoku Puzzles I am publishing as #297th and #298th Sudoku puzzles in the Fun With Sudoku Series. Here are the next are previous Sudoku puzzles published in this series.

The previous Sudoku Puzzle is the Touchy Sudoku Puzzle (Fun With Sudoku #296)

The next Sudoku Puzzle is Anti Knight Sudoku Puzzle (Fun With Sudoku #299)