After you have found your knack for playing easy sudoku puzzles on 24/7 Sudoku, you will want to up your game with our Medium Sudoku puzzles! These sudoku games are a bit harder than the easy puzzles, although they still can be solved with simple logic. Yet, these sudoku puzzles no longer have superfluous clues, and you must work harder for your Sudoku win. Sudoku is a fun game, popular with all ages from kids to adults, as it employs simple puzzle game logic. The goal is to enter the numbers 1 through 9 into the sudoku board in every 3x3 square, row and column only once. This Medium Sudoku game will most likely requre you to use notes. You can use the notes by clicking the pencil button in the bottom right corner. The sudoku tiles on the outside will disappear to only show the numbers only. In this mode you can click a number to add a note or just type the note into the open sudoku slot. A helpful hint from 24/7 Sudoku: When there are only two slots a possible number can be entered into, put those into the notes. While playing, from time to time you may notice only one of the possible placements is left, and you have a quick move to progress toward sudoku victory!