PlaySudoku.us
Medium · Puzzle #50
3
9
1
5
6
6
7
2
8
4
2
3
7
4
5
6
8
8
1
6
2
4
9
6
8
6
7
5
1
9
3
9
"Concentration is the secret of strength in politics, in war, in trade — in short, in all management of human affairs." — Ralph Waldo Emerson
"Concentration is the secret of strength in politics, in war, in trade — in short, in all management of human affairs." — Ralph Waldo Emerson
"Absence of evidence is not evidence of absence." — Carl Sagan
"Absence of evidence is not evidence of absence." — Carl Sagan