killer sudoku

sudoku

Triples

10

first second third
7 2 1
6 3 1
5 4 1
5 3 2

Nine

first second third
6 2 1
5 3 1
4 3 2

Eight

(needs 1)

first second third
5 2 1
4 3 1

Seven

first second third
4 2 1

Six

first second third
3 2 1

Quadruples

19

first second third fourth
9 7 2 1
9 6 3 1
9 5 4 1
9 5 3 2

and more... not sure how useful this is