1234 Sudoku (Fun With Sudoku #134)

1234 Sudoku appeared in the recent 10th World Sudoku Championship. Before this championship, I had not come across this Sudoku type, so I decided to create it for practice. I have kept the design of two hearts for this Sudoku. Similar design I used for one of my Classic Sudoku puzzles which I created last year for Sudoku Mahabharat.

This 1234 Sudoku, I am posting as 134th Sudoku in the Fun With Sudoku Series. Can you solve this 1234 Sudoku puzzle?

Rules of 1234 Sudoku

Place one 1, two 2s, three 3s, and four 4s in every row, column, and outlined 10-cell region. Adjacent cells must contain different digits.

1234 Sudoku (Fun With Sudoku #134)

1234 Sudoku (Fun With Sudoku #134) Solution

Previous Sudoku Kropki Sudoku (Fun With Sudoku #133)

Next Sudoku Either Or Sudoku (Fun With Sudoku #135)

Solution of Daily Sudoku League puzzle titled Free Blocks Sudoku (Daily Sudoku League #145)

Free Blocks Sudoku (Daily Sudoku League #145) Solution