Playing sudoku regularly helps improve memory. You will be able to remember and apply complicated strategies without help eventually
The entire game is based on logical thinking and decision making thereby boosting these skills
As sudoku requires a lot of concentration and focus, it reduces anxiety and stress by distracting and immersing you in the game
Every break breaks your chain of thought, making you re-focus and motivating you to take fewer breaks. It thereby helps improve concentration and re-focussing skills
Successfully finishing a sudoku puzzle gives you a great sense of accomplishment and self-satisfaction and increases happiness