Hello, I learned Sudoku from "The Sudoku Guy" on You Tube and it became fun and challenging. To start, it's best to look at 3 horizontal rows at once and determine where any 2 of the same given numbers are located and then you know which box and row the third number is going in and you can pencil it in if it can go in more than one cell. Pencil notes are necessary ! I love the Wallaby photo!