PlaySudoku.us
Hard · Puzzle #241
4
3
9
8
3
4
5
2
9
3
5
9
1
2
6
3
2
1
8
7
5
9
8
7
6
2
When a row, column, and box all intersect, the intersection cell is the most constrained — always check it first.
When a row, column, and box all intersect, the intersection cell is the most constrained — always check it first.
Sudoku appeared as a puzzle category on Jeopardy! during the height of its US popularity in 2005–2006.
Sudoku appeared as a puzzle category on Jeopardy! during the height of its US popularity in 2005–2006.