improve at sudoku

11:52

11:30

11:42

6:27

1:50

29:22

12:59

20:42

5:59

12:37

12:37

1:28

12:37

10:00

10:00

12:37

2:02

10:00

17:00

9:06

2:30

13:38

3:15

18:34

3:43

21:22

4:03

9:59

30:03

22:37

17:13

14:43

1:02

15:09

15:12

14:49

29:20

14:04

1:32:41

7:17