2
5
6
1
7
1
7
5
8
9
8
7
2
1
2
7
8
9
8
5
4
8
6
2
9
8
6
5
3
1
1
8
4
1
9
2
"Chess is the art of analysis." — Mikhail Botvinnik
"Chess is the art of analysis." — Mikhail Botvinnik
"Mathematics is the queen of the sciences." — Carl Friedrich Gauss
"Mathematics is the queen of the sciences." — Carl Friedrich Gauss