PlaySudoku.us
Hard · Puzzle #175
7
4
3
4
5
6
9
1
3
2
9
7
7
8
5
1
9
2
4
7
8
7
1
6
2
6
3
If you solved one unique Sudoku puzzle per second, it would take you over 200 trillion years to solve every possible grid.
If you solved one unique Sudoku puzzle per second, it would take you over 200 trillion years to solve every possible grid.
Keep a mental note of which digits are 'almost placed' — appearing 8 times on the board. One more elimination will solve them.
Keep a mental note of which digits are 'almost placed' — appearing 8 times on the board. One more elimination will solve them.