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

This Sudoku Puzzle has 66 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Skyscraper, undefined, Locked Pair techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 7 / Column 6 → 6 (Naked Single)
2. Row 2 / Column 9 → 1 (Naked Single)
3. Row 7 / Column 2 → 1 (Naked Single)
4. Row 2 / Column 7 → 2 (Naked Single)
5. Row 2 / Column 4 → 6 (Hidden Single)
6. Row 5 / Column 8 → 8 (Hidden Single)
7. Row 9 / Column 7 → 1 (Hidden Single)
8. Row 9 / Column 8 → 6 (Hidden Single)
9. Row 9 / Column 2 → 8 (Naked Single)
10. Row 8 / Column 1 → 6 (Hidden Single)
11. Row 4 / Column 2 → 6 (Hidden Single)
12. Row 7 / Column 8 → 4 (Hidden Single)
13. Row 7 / Column 4 → 9 (Full House)
14. Row 6 / Column 7 → 6 (Hidden Single)
15. Row 8 / Column 3 → 2 (Hidden Single)
16. Row 3 / Column 1 → 4 (Hidden Single)
17. Row 1 / Column 7 → 4 (Hidden Single)
18. Row 3 / Column 8 → 9 (Hidden Single)
19. Row 1 / Column 8 → 5 (Full House)
20. Row 1 / Column 5 → 9 (Hidden Single)
21. Row 5 / Column 1 → 2 (Hidden Single)
22. Locked Candidates Type 1 (Pointing): 5 in b1 => r2c5<>5
23. Locked Candidates Type 1 (Pointing): 5 in b7 => r9c456<>5
24. Locked Candidates Type 1 (Pointing): 3 in b9 => r8c45<>3
25. Naked Pair: 3,7 in r5c26 => r5c347<>3, r5c47<>7
26. Row 5 / Column 7 → 9 (Naked Single)
27. Row 8 / Column 7 → 3 (Naked Single)
28. Row 4 / Column 7 → 7 (Full House)
29. Row 8 / Column 9 → 9 (Full House)
30. Naked Pair: 3,7 in r59c6 => r134c6<>3, r1c6<>7
31. Locked Candidates Type 1 (Pointing): 3 in b2 => r69c4<>3
32. Skyscraper: 7 in r1c4,r5c6 (connected by r15c2) => r6c4<>7
33. X-Wing: 7 r26 c15 => r9c5<>7
34. W-Wing: 8/5 in r4c6,r8c4 connected by 5 in r3c46 => r6c4<>8
35. Locked Pair: 1,4 in r56c4 => r46c5,r9c4<>4
36. Row 9 / Column 4 → 7 (Naked Single)
37. Row 9 / Column 6 → 3 (Naked Single)
38. Row 5 / Column 6 → 7 (Naked Single)
39. Row 9 / Column 5 → 4 (Naked Single)
40. Row 5 / Column 2 → 3 (Naked Single)
41. Row 3 / Column 2 → 2 (Naked Single)
42. Row 1 / Column 2 → 7 (Full House)
43. Row 3 / Column 6 → 5 (Naked Single)
44. Row 3 / Column 4 → 3 (Full House)
45. Row 4 / Column 6 → 8 (Naked Single)
46. Row 1 / Column 6 → 2 (Full House)
47. Row 1 / Column 4 → 8 (Naked Single)
48. Row 1 / Column 3 → 3 (Full House)
49. Row 2 / Column 5 → 7 (Full House)
50. Row 4 / Column 1 → 9 (Naked Single)
51. Row 6 / Column 5 → 3 (Naked Single)
52. Row 8 / Column 4 → 5 (Naked Single)
53. Row 8 / Column 5 → 8 (Full House)
54. Row 4 / Column 5 → 5 (Full House)
55. Row 4 / Column 3 → 4 (Naked Single)
56. Row 4 / Column 9 → 3 (Full House)
57. Row 6 / Column 9 → 4 (Full House)
58. Row 9 / Column 1 → 5 (Naked Single)
59. Row 9 / Column 3 → 9 (Full House)
60. Row 5 / Column 3 → 1 (Naked Single)
61. Row 5 / Column 4 → 4 (Full House)
62. Row 6 / Column 4 → 1 (Full House)
63. Row 2 / Column 1 → 8 (Naked Single)
64. Row 2 / Column 3 → 5 (Full House)
65. Row 6 / Column 3 → 8 (Full House)
66. Row 6 / Column 1 → 7 (Full House)