PlaySudoku.us
Easy · Puzzle #239
1
7
4
5
2
8
3
8
4
7
6
6
9
1
7
1
6
3
2
8
8
9
4
6
2
3
5
8
1
3
2
5
4
8
9
7
8
1
4
5
1
8
2
7
3
Finnish mathematician Arto Inkala created what is widely considered the world's hardest Sudoku in 2012.
Finnish mathematician Arto Inkala created what is widely considered the world's hardest Sudoku in 2012.
"Science is the great antidote to the poison of enthusiasm and superstition." — Adam Smith
"Science is the great antidote to the poison of enthusiasm and superstition." — Adam Smith