SUDOKU YESTERDAY’S SOLUTION

Start at number 1. Use the same logic from an easy puzzle to fill in every empty box with all of the possible numbers for that box. If possible, put in definites. In a hard Sudoku, you won’t be able to solve from the start, so just fill in what you know it could be. This will help later when you have two or three options per box and you can’t remember what they are.