PlaySudoku.us
Medium · Puzzle #423
8
7
3
4
9
1
9
8
6
1
3
5
8
9
1
1
3
7
9
4
8
3
7
2
3
5
8
7
4
9
7
9
8
9
The BBC produced a television game show based on Sudoku in 2005, during the height of the puzzle's popularity.
The BBC produced a television game show based on Sudoku in 2005, during the height of the puzzle's popularity.
The 'Skyscraper' technique links two X-Wing candidates via a shared column — advanced but powerful on expert grids.
The 'Skyscraper' technique links two X-Wing candidates via a shared column — advanced but powerful on expert grids.