PlaySudoku.us
Easy · Puzzle #601
1
6
3
2
9
4
5
2
6
1
2
7
1
8
4
7
8
6
3
1
9
3
1
8
2
1
2
4
8
3
2
7
5
9
1
4
8
6
4
8
6
3
9
8
6
7
4
3
2
1
"It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change." — Charles Darwin
"It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change." — Charles Darwin
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.