PlaySudoku.us
Hard · Puzzle #527
6
5
5
4
6
4
8
5
9
3
5
1
4
1
3
8
9
1
8
9
8
4
6
1
7
2
9
4
"In science, there are no shortcuts to truth." — Karl Popper
"In science, there are no shortcuts to truth." — Karl Popper
"Candidates must be mentally prepared for every new game as if it were the last." — Mikhail Botvinnik
"Candidates must be mentally prepared for every new game as if it were the last." — Mikhail Botvinnik