“sudoku” is a Japanese word (meaning “digit single”), it got that name only around 1986.
A 9×9 square must be filled in with numbers from 1-9 with no repeated numbers in each line, horizontally or vertically.
To make it more challenging , there are 3×3 squares marked out in the grid, and each of these squares can’t have any repeat numbers either.
Search Easy Solutions
Many puzzles have one or two blank spaces in a box or a line.
You'll be one step closer to a solution by completing these blanks.
Keep Scanning the Entire Puzzle
Avoid focusing too intently on a single area of the grid if you become stuck. Let your eye wander throughout the grid in search of a different spot with fresh possibilities.
Stay calm and enjoy the hunt.
Though you want to complete a puzzle, keep in mind that the goal is to appreciate the challenge and exercise your brain as you unwind. Take a break if you start to feel frustrated