PlaySudoku.us
Expert · Puzzle #67
7
5
6
3
7
6
3
5
7
4
3
1
7
9
4
3
9
7
4
1
2
6
4
1
9
3
In combinatorics, the pattern formed by Sudoku clue cells is studied as a problem in 'hitting sets' and transversals.
In combinatorics, the pattern formed by Sudoku clue cells is studied as a problem in 'hitting sets' and transversals.
"The greatest enemy of knowledge is not ignorance; it is the illusion of knowledge." — Stephen Hawking
"The greatest enemy of knowledge is not ignorance; it is the illusion of knowledge." — Stephen Hawking