3
8
6
2
7
5
6
7
9
1
4
6
2
3
6
8
4
8
9
7
6
7
8
8
7
1
3
6
4
8
5
4
2
Solving Sudoku exercises the prefrontal cortex — the brain region responsible for planning and decision-making.
Solving Sudoku exercises the prefrontal cortex — the brain region responsible for planning and decision-making.
"Chess is life in miniature. Chess is struggle, chess is battles." — Garry Kasparov
"Chess is life in miniature. Chess is struggle, chess is battles." — Garry Kasparov