Killer Sudoku
Classic rules plus cages: dotted groups must add up to their sum, with no repeated digit inside a cage.
2
7
3
5
8
9
1
8
4
6
2
7
4
1
4
8
9
7
3
4
1
3
7
2
8
5
6
8
6
2
7
1
2
3
9
7
Classic rules plus cages: dotted groups must add up to their sum, with no repeated digit inside a cage.