Sudoku Truck… I mean Trick Check out this example row: 1 2 3 4 5 6 7 8 9 4/5 2 8 6/9 6/9 7 3 4/5/9 1 Look at cells 1 and 8. Both of those have 4 and 5 as possibilities but cell 8 also has 9. We know a row has to have both a 4 and […]