Not everybody in class gets this valentine! Hard Valentine's Day Sudoku ups the sudoku ante with less possible answers that require advanced strategic play to solve. There are hundreds of Hard Valentine's Day Sudoku games available at Valentine's Day Sudoku.com for you to test your sudoku skills on. Have a really long time? Try, try, and try again! Can you solve the puzzle in 18 minutes or less? Hard Valentine's Day Sudoku has the comforts of home with a familiar board complete with hearts, arrows, and roses yet it will challenge you in a way Easy and Medium Valentine's Day Sudoku do not. However, the fundamentals of the Hard Sudoku game are the same. The sudoku board is comprised of nine rows and columns. Within the rows and columns are nine 3x3 sudoku squares. The sudoku objective is to fill each empty space with a row, column, and 3x3 square with the numbers 1 through nine. Each digit may be place only one in each row, column, or square in this strategy game. If you are having a hard time mastering the Hard Valentine's Day Sudoku game but it is time to catch the bus for work, that is not a problem! 24/7 Games is available on all your mobile devices as well. So whether you are at a romantic candlelight Valentine's Dinner, at the flower shop buying roses for your honey, or chomping down on some Russel Stovers in the break room you can play this challenging and free sudoku puzzle game!