2
5
6
3
8
7
7
9
4
7
8
5
4
8
5
6
2
7
9
5
9
3
7
6
7
6
1
5
9

This Sudoku Puzzle has 39 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), undefined, Uniqueness Test 1, Give Up techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 2 → 1 (Naked Single)
2. Row 7 / Column 2 → 4 (Naked Single)
3. Row 2 / Column 2 → 9 (Naked Single)
4. Row 9 / Column 2 → 6 (Naked Single)
5. Row 1 / Column 1 → 1 (Naked Single)
6. Row 2 / Column 3 → 4 (Full House)
7. Row 1 / Column 4 → 8 (Hidden Single)
8. Row 1 / Column 5 → 6 (Hidden Single)
9. Row 3 / Column 8 → 6 (Hidden Single)
10. Row 7 / Column 9 → 7 (Hidden Single)
11. Row 9 / Column 3 → 1 (Hidden Single)
12. Row 9 / Column 5 → 4 (Hidden Single)
13. Row 1 / Column 7 → 9 (Hidden Single)
14. Row 4 / Column 1 → 9 (Hidden Single)
15. Row 8 / Column 9 → 4 (Hidden Single)
16. Row 1 / Column 9 → 3 (Naked Single)
17. Row 1 / Column 8 → 4 (Full House)
18. Row 5 / Column 9 → 2 (Naked Single)
19. Row 5 / Column 1 → 8 (Naked Single)
20. Row 8 / Column 1 → 2 (Full House)
21. Row 8 / Column 3 → 8 (Full House)
22. Row 5 / Column 3 → 3 (Naked Single)
23. Row 5 / Column 4 → 4 (Full House)
24. Row 6 / Column 3 → 6 (Naked Single)
25. Row 4 / Column 3 → 2 (Full House)
26. Row 6 / Column 9 → 1 (Naked Single)
27. Row 4 / Column 9 → 6 (Full House)
28. Row 4 / Column 7 → 4 (Hidden Single)
29. Locked Candidates Type 1 (Pointing): 2 in b3 => r7c7<>2
30. W-Wing: 3/1 in r2c5,r4c6 connected by 1 in r7c56 => r2c6<>3
31. XY-Wing: 1/2/3 in r2c5,r39c4 => r2c4,r7c5<>3
32. Row 7 / Column 5 → 1 (Naked Single)
33. Row 2 / Column 5 → 3 (Full House)
34. Uniqueness Test 1: 1/2 in r2c47,r3c47 => r2c4<>1, r2c4<>2
35. Row 2 / Column 4 → 5 (Naked Single)
36. Row 8 / Column 4 → 9 (Naked Single)
37. Row 8 / Column 6 → 5 (Full House)
38. Row 6 / Column 6 → 9 (Hidden Single)
39. Give Up: Don't know how to proceed!