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

This Sudoku Puzzle has 52 steps and it is solved using Full House, Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Skyscraper, undefined, Naked Pair techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 2 → 5 (Full House)
2. Row 6 / Column 8 → 8 (Naked Single)
3. Row 6 / Column 7 → 7 (Full House)
4. Row 3 / Column 3 → 2 (Hidden Single)
5. Row 4 / Column 2 → 6 (Hidden Single)
6. Row 5 / Column 1 → 8 (Hidden Single)
7. Row 1 / Column 3 → 1 (Hidden Single)
8. Row 6 / Column 2 → 2 (Hidden Single)
9. Row 7 / Column 3 → 6 (Hidden Single)
10. Locked Candidates Type 1 (Pointing): 7 in b1 => r79c1<>7
11. Locked Candidates Type 1 (Pointing): 5 in b2 => r6c6<>5
12. Row 6 / Column 6 → 4 (Naked Single)
13. Row 5 / Column 2 → 4 (Hidden Single)
14. Row 9 / Column 2 → 7 (Full House)
15. Row 7 / Column 4 → 4 (Hidden Single)
16. Row 9 / Column 1 → 4 (Hidden Single)
17. Row 4 / Column 4 → 8 (Hidden Single)
18. Skyscraper: 9 in r7c1,r8c4 (connected by r6c14) => r7c5<>9
19. X-Wing: 9 c35 r49 => r9c79<>9
20. Naked Pair: 3,5 in r19c9 => r37c9<>5
21. W-Wing: 8/9 in r7c7,r9c5 connected by 9 in r8c49 => r7c56,r9c7<>8
22. Row 9 / Column 7 → 3 (Naked Single)
23. Row 1 / Column 7 → 6 (Naked Single)
24. Row 9 / Column 9 → 5 (Naked Single)
25. Row 1 / Column 1 → 7 (Naked Single)
26. Row 3 / Column 1 → 6 (Full House)
27. Row 3 / Column 7 → 9 (Naked Single)
28. Row 7 / Column 7 → 8 (Full House)
29. Row 1 / Column 9 → 3 (Naked Single)
30. Row 7 / Column 8 → 1 (Naked Single)
31. Row 9 / Column 3 → 9 (Naked Single)
32. Row 7 / Column 1 → 5 (Full House)
33. Row 9 / Column 5 → 8 (Full House)
34. Row 6 / Column 1 → 9 (Full House)
35. Row 6 / Column 4 → 5 (Full House)
36. Row 3 / Column 9 → 1 (Naked Single)
37. Row 4 / Column 3 → 7 (Naked Single)
38. Row 5 / Column 3 → 5 (Full House)
39. Row 5 / Column 4 → 7 (Full House)
40. Row 8 / Column 4 → 9 (Full House)
41. Row 8 / Column 9 → 7 (Full House)
42. Row 7 / Column 9 → 9 (Full House)
43. Row 1 / Column 5 → 4 (Naked Single)
44. Row 4 / Column 6 → 2 (Naked Single)
45. Row 4 / Column 5 → 9 (Full House)
46. Row 1 / Column 8 → 5 (Naked Single)
47. Row 1 / Column 6 → 8 (Full House)
48. Row 3 / Column 8 → 4 (Full House)
49. Row 3 / Column 5 → 7 (Naked Single)
50. Row 3 / Column 6 → 5 (Full House)
51. Row 7 / Column 6 → 7 (Full House)
52. Row 7 / Column 5 → 2 (Full House)