PlaySudoku.us
Medium · Puzzle #665
2
5
9
3
3
6
4
4
7
2
8
6
9
5
1
2
4
3
1
9
2
4
6
7
9
2
6
1
8
9
9
1
2
8
"Equipped with his five senses, man explores the universe around him and calls the adventure Science." — Edwin Hubble
"Equipped with his five senses, man explores the universe around him and calls the adventure Science." — Edwin Hubble
Before using pencil marks, see how far you can get on a hard puzzle with pure mental tracking.
Before using pencil marks, see how far you can get on a hard puzzle with pure mental tracking.