More advance Sudoku strategies and tactics are used in the more challenging and difficult levels of the Sudoku puzzles and they can help in reducing the number of candidates per cell or to find the specific candidate for an explicit cell. These tactics require high level of concentration, and attentiveness from the puzzle solver as
Crosswords and Number Puzzles like Sudoku are Linked to Sharper Brain “Regular crosswords and number puzzles linked to sharper brain in later life.” ScienceDaily. www.sciencedaily.com/releases/2019/05/190516082349.htm The more regularly adults aged 50 and over played puzzles such as crosswords and Sudoku, the better their brain function, according to research in more than 19,000 participants, led by the