PlaySudoku.us
Evil · Puzzle #765
6
1
3
2
4
1
5
4
3
7
6
8
7
8
4
9
7
7
4
2
1
9
6
6
9
Competitive Sudoku solvers can hold the full pencil-mark state of a 9×9 grid in working memory, updating it mentally as they go.
Competitive Sudoku solvers can hold the full pencil-mark state of a 9×9 grid in working memory, updating it mentally as they go.
The Times Sudoku Championship in the UK has been held annually since 2005, drawing hundreds of competitors.
The Times Sudoku Championship in the UK has been held annually since 2005, drawing hundreds of competitors.