The objective is to fill the 9×9 grid with numbers so that each column, row, and each 3×3 sub-grid contains all of the digits from 1 to 9. The puzzle usually only has one solution. There are various different levels of these puzzles including beginner, intermediate and advanced.

Sudoku is extremely addictive and can be very painstaking so breaks are recommended as often as possible. Whilst enjoying the game makes sure to take plenty of notes so that you do not have to start from the beginning again.

Whilst playing Sudoku I often find drinking a cup of tea and having biscuits extremely enjoyable. The puzzles have often been found in newspapers everywhere to help keep the mind intact and provide hours and hours of fun.

Sudoku is an alternative to crosswords, Word searches, and all other types of puzzles that keep the brain occupied.

I recently found two of these puzzles in a newspaper next to a advertisement for a prestige car hire company who offer Range Rover hire and Aston Martin car hire.