7
1
9
2
7
6
1
4
1
9
2
5
7
9
5
3
1
8
4
2
7
4
6
5
4
2
6
5
1
8
7
1
5
6
"Chess is the art of analysis." — Mikhail Botvinnik
"Chess is the art of analysis." — Mikhail Botvinnik
There are Sudoku apps that generate over 1 billion distinct puzzles — you could solve a new one every day for 2.7 million years.
There are Sudoku apps that generate over 1 billion distinct puzzles — you could solve a new one every day for 2.7 million years.