PlaySudoku.us
Hard · Puzzle #590
1
4
6
5
3
9
1
4
7
2
3
6
2
3
6
1
5
4
1
8
9
6
5
3
8
8
7
Retired architect Howard Garns, who invented the modern Sudoku, never knew it became a global phenomenon — he died in 1989.
Retired architect Howard Garns, who invented the modern Sudoku, never knew it became a global phenomenon — he died in 1989.
"Chess is the art of analysis." — Mikhail Botvinnik
"Chess is the art of analysis." — Mikhail Botvinnik